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[00:00:32] <MrSunshine> ye those are bullnosed .. they i know are flat .. mine is a ball end mill .. oh well have to check it tomorrow .. gonna take a photo of it and compare it to a circle in cad program .. then i will have black on white if its flat at the end or not =)
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[00:01:43] <_methods> you're just trying to determine if it has a flat on it?
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[00:03:44] <MrSunshine> ye
[00:03:57] <_methods> takin a pic and comparing it to a circle is probably the best way to go
[00:04:09] <_methods> unless you have an optical comparator laying around
[00:04:38] <_methods> you could run it along something and check the path with a radius gauge
[00:04:54] <_methods> if you have radius gauges
[00:04:59] <MrSunshine> do not have radius guage so i guess the best check i can do is to photograph it and compare it
[00:05:18] <_methods> yeah you need to make sure the camera is square to the mill
[00:05:34] <_methods> or you could cause a parallax error
[00:05:40] <_methods> i think it's parallax?
[00:05:47] <Jymmm> Put a steel rule on it
[00:06:17] <Jymmm> that will give you scale in the photo to resize as needed.
[00:07:09] <Tom_itx> use a 1" marble
[00:07:17] <Jymmm> and a silver dollar is exactly 1.5" =)
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[00:08:06] <Jymmm> 6" steel rule works good, as it has the graduations on it
[00:08:47] <Tom_itx> gawd everybody's in a hurry tonight...
[00:08:51] <Tom_itx> traffic was nuts
[00:08:58] <Jymmm> just lock the H/W when resziing photo
[00:09:09] <_methods> https://www.youtube.com/watch?v=wtProYWkpcM
[00:09:17] <_methods> in honor of thxgiving
[00:09:18] <Jymmm> Yeah it was, couldn't go faster than 70MPH
[00:09:34] <Jymmm> 80MPH on the way back
[00:09:57] <Jymmm> Oh, be warned...
[00:10:36] <Jymmm> If you exchange propane tanks at Lowes/Blue rhino, they are now RECERIFYING tanks, which are only good for 5 year instead of ten.
[00:10:44] <_methods> oh wtf
[00:10:55] <_methods> i'll just get big tanks and refill my own now i guess
[00:10:57] <Jymmm> Look for the double date stamps
[00:10:58] <_methods> assholes
[00:11:46] <Jymmm> It's still good for exchange, I did find a JUNE 2014 single date tank
[00:12:12] <Jymmm> But do keep an eye out for RECERTIFIED (dual dates)
[00:12:34] <_methods> thx for the heads up
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[00:13:27] <Jymmm> _methods: and the date has moved on the collar for 2014
[00:13:38] <Jymmm> _methods: it's closer to the TW
[00:17:13] <Jymmm> _methods: Original FEB1998+10 = EXP FEB2008. RECERTIFIED MAY 2012 + 5 = EXP MAY2017
[00:17:17] <Jymmm> http://www.thurstontalk.com/wp-content/uploads/2012/05/2012-05-29_13-05-58_985.jpg
[00:17:59] <MrSunshine> Jymmm, i know the dia of the mill so i guess that should be good enough to check if its flat on the end :P
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[00:19:03] <Jymmm> MrSunshine: I try to have things of know diameter around for such things =)
[00:19:22] <Jymmm> MrSunshine: I keep a silver dollar in the desk drawer as example
[00:21:25] <Jymmm> _methods:
http://junkyardsports.com/images/piggas.jpg
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[00:31:29] <_methods> hahahah now that's a tank
[00:33:01] <Jymmm> Sorry, it's 12 years, not ten
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[00:37:53] <Aero-Tec> got to love windows
[00:38:10] <Aero-Tec> I have the lathe and mill hooked up to a network
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[00:38:13] <Jymmm> Aero-Tec: The oldest and most profitable virus still going.
[00:38:22] <Aero-Tec> I can see the mill but not the lathe
[00:38:45] <Aero-Tec> every thing was working great till a power bump
[00:38:56] <Aero-Tec> so restarted everything
[00:39:28] <Aero-Tec> now I can see the mill but not the lathe
[00:39:48] <Jymmm> Aero-Tec: How? ping? windows explorer?
[00:39:51] <Aero-Tec> but if I go into my history I can find where I was accessing the lathe
[00:40:17] <Aero-Tec> click on it and the lathe is now accessible
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[00:40:24] <Aero-Tec> explorer
[00:40:47] <Jymmm> and what are the mill/lathe runing linux?
[00:40:58] <Aero-Tec> thing is doing a refresh in the network window and lathe is still missing
[00:41:03] <Aero-Tec> yes
[00:41:10] <Aero-Tec> linuxcnc
[00:41:30] <Jymmm> I blame the operator for that.
[00:41:48] <Jymmm> you didn't configure SMB for master browser
[00:41:49] <Aero-Tec> so with a history link I can get to lathe but the networking part of windows does not see it
[00:42:04] <Aero-Tec> ?
[00:42:20] <Aero-Tec> I had no problems before power bump
[00:42:23] <Jymmm> It's not like DNS
[00:42:28] <Aero-Tec> always worked fine
[00:42:52] <Aero-Tec> been doing this for over a year
[00:43:03] <Jymmm> and what do you have for DNS for all three machines?
[00:43:16] <Aero-Tec> just funny that now it does not show up but I can still get to it
[00:43:33] <Jymmm> yep, that makes sense.
[00:43:43] <Aero-Tec> what every the default was I guess
[00:44:01] <Aero-Tec> whatever
[00:44:28] <Aero-Tec> I did not mess with the DNS for linux
[00:44:44] <Jymmm> and you did for windows?
[00:44:51] <Aero-Tec> may have for windows, not sure been awhile if I did
[00:45:33] <Aero-Tec> the other my test machine show fine
[00:45:44] <Aero-Tec> oops
[00:45:56] <Aero-Tec> my code testing machine
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[00:47:59] <Aero-Tec> funny the code testing machine does not see the lathe ether
[00:48:05] <Aero-Tec> it is linuxcnc
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[00:54:20] <Aero-Tec> same thing
[00:54:59] <Aero-Tec> should I be restarting the lathe computer?
[00:55:31] <Aero-Tec> any ideas as to why the lathe is hidden?
[00:56:51] <Aero-Tec> should I be messing with the DNS?
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[00:59:31] <Aero-Tec> other then installing it I have not messed around with SMB
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[01:00:30] <Aero-Tec> not sure how one would setup master browser, or even what the means
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[01:15:46] <Jymmm> Aero-Tec:
http://ubuntuforums.org/showthread.php?t=1524474
[01:16:10] <Aero-Tec> got to love power bumps
[01:16:54] <Aero-Tec> my code test machine was not showing all the stuff it used to in linux window
[01:17:05] <Aero-Tec> so rebooted
[01:17:31] <Aero-Tec> now says error in HD
[01:17:55] <Aero-Tec> I hit f for fix
[01:18:03] <Aero-Tec> and that did not help at all
[01:18:46] <Aero-Tec> ok so I did a few restarts of it and now it is doing a check dish run
[01:18:52] <Aero-Tec> disk
[01:18:54] <Aero-Tec> lol
[01:19:54] <Aero-Tec> so it started but the icons along the top like time and stuff are missing
[01:20:28] <Aero-Tec> also the tool bar at the bottom is blank
[01:20:42] <Aero-Tec> no switch windows and stuff
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[01:22:27] <Aero-Tec> just desktop icons and the stuff on the top left, also has the firefox icon and help on the left
[01:22:55] <Aero-Tec> anyway to get the default stuff back?
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[01:27:10] <Aero-Tec> messed with it some and found out how to add things
[01:31:32] <Aero-Tec> Jymmm, thanks for the info
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[01:40:18] <LeelooMinai> What is the name for those things one can put into a collet and it will detect edges of metal opbjects and hopefully lets linuxcnc know where they are?
[01:40:37] <Tom_itx> touch probe
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[01:41:09] <LeelooMinai> O, right. ANy comments on them? Are they fully suported/useful?
[01:41:29] <Tom_itx> uh huh
[01:42:34] <Jymmm> edge finder?
[01:42:39] <Jymmm> electronic edge finder?
[01:43:32] <LeelooMinai> I think I have some edge finder thing with some metal disk, but I don't think it's designed to work with something like linuxcnc
[01:44:26] <Aero-Tec> well things are working now, it fixed itself
[01:44:28] <LeelooMinai> It's more for some manual technique, I forgot now:)
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[01:45:06] <Aero-Tec> all I did was restart the test computer a few times and do a refresh in the windows network window
[01:45:20] <Aero-Tec> it all show up like it should
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[01:47:37] <Aero-Tec> still having some problems with the lathe code
[01:47:40] <Aero-Tec> http://pastebin.com/giquCv6b
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[01:48:00] <Aero-Tec> it does work at times
[01:48:21] <Aero-Tec> but errors every so often
[01:48:52] <Aero-Tec> it goes to
[01:48:54] <Aero-Tec> Z0.75
[01:48:54] <Aero-Tec> X3.25
[01:49:02] <Aero-Tec> and errors
[01:49:14] <Aero-Tec> has done it 3 times so far
[01:49:32] <Aero-Tec> but I have made over 30 parts
[01:49:43] <Aero-Tec> so it has worked most of the time
[01:50:00] <Aero-Tec> posted the part of the code that errors
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[01:50:33] <Aero-Tec> fresh eyes would be gladly welcomed
[01:51:51] <Aero-Tec> some one said I should not use - in place of _ in variable names so I changed that
[01:53:06] <Aero-Tec> this last time is complained about #<SPINDLE_SPEED> variable
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[01:53:22] <Aero-Tec> before it would complain about some letter
[01:53:32] <Aero-Tec> so it has got better
[01:54:10] <Aero-Tec> the letters were e and I believe t
[01:54:41] <_methods> what are you using to post?
[01:54:47] <Aero-Tec> did not make sense
[01:55:05] <Aero-Tec> post?
[01:55:11] <_methods> yes post process
[01:55:15] <Aero-Tec> you meant to write and save the code?
[01:55:20] <_methods> yes
[01:55:25] <Aero-Tec> I hand code
[01:55:37] <_methods> ah
[01:55:42] <Aero-Tec> all hand coded
[01:55:43] <_methods> link to your code?
[01:56:15] <Aero-Tec> http://pastebin.com/giquCv6b
[01:56:54] <Aero-Tec> section of code where error hits
[01:57:04] <_methods> um you should probably put some basic safety stuff in your code
[01:57:10] <Aero-Tec> all 3 times in the exact same spot
[01:57:42] <Aero-Tec> does the
[01:57:44] <Aero-Tec> G0
[01:57:44] <Aero-Tec> Z0.75
[01:57:44] <Aero-Tec> X3.25
[01:57:55] <Aero-Tec> moves and then stops
[01:58:13] <Aero-Tec> not sure why
[01:58:21] <_methods> why do you have semicolons in front of your lines?
[01:58:38] <Aero-Tec> rems out the line
[01:59:08] <_methods> well standard practice to to put your EOL at the end of each line
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[02:00:20] <_methods> is a m30 or m2 not reqd by linuxcnc?
[02:00:47] <_methods> are you using incremental or absolute?
[02:00:58] <Aero-Tec> that is just a code snippet the m30 is later on
[02:01:21] <Aero-Tec> both at times, mostly abs
[02:01:33] <_methods> well what's active when your program starts
[02:01:40] <_methods> that could be causing you problems
[02:01:41] <Aero-Tec> inc is just for small sections so far
[02:01:58] <Aero-Tec> abs
[02:01:58] <_methods> well if inc is still active when you call that abs at the top of the prog.............
[02:02:21] <Aero-Tec> I have a INI
[02:02:51] <_methods> you have startup code in your ini?
[02:02:55] <Aero-Tec> ;CODE START
[02:02:55] <Aero-Tec>
[02:02:55] <Aero-Tec> G18 G40 G49 G90 G94 G80
[02:02:55] <Aero-Tec> M3
[02:02:55] <Aero-Tec> G20
[02:02:56] <Aero-Tec> G95
[02:02:57] <Aero-Tec> yes
[02:03:07] <Aero-Tec> every time
[02:03:18] <Aero-Tec> it is part of the gcode
[02:03:26] <_methods> kk
[02:04:48] <_methods> well i have no idea but this looks like it might cause a problem
[02:05:17] <_methods> ;G0 X[#3+#4]
[02:05:18] <_methods> G0 X[#<_RAIDIUS_OF_STOCK>+#<_CUT_START_OFFSET>] Z[-0.635-#<WIDTH_OF_CUTOFF_BLADE>]
[02:05:27] <_methods> looks like you have 2 rapids on the same line
[02:05:38] <_methods> 2 x rapids
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[02:06:25] <Aero-Tec> how can that be 2 rapids on the same line?
[02:06:28] <renesis> i dont see whatever you are seeing that
[02:06:38] <Topy44> i mentioned a pcb i was designing a few days ago, a safety- and interface-board for our linuxcnc-controlled laser cutter
[02:06:46] <renesis> one looks commented out and even if it wasnt it would run fine?
[02:06:48] <Aero-Tec> one line is remed out
[02:06:58] <renesis> even if it wasnt
[02:07:05] <_methods> oh i'm so used to ; as EOL
[02:07:11] <renesis> nothing wrong with g0 two lines in a row
[02:07:16] <Topy44> that goes absolutely sure that the laser cannot be turned on unless everything is ok (no endstop switches activated, lid closed, exhaust and cooling systems running, etc.)
[02:07:18] <_methods> that's an EOL on a real cnc
[02:08:30] <Topy44> and also handles controlling stuff like the interior lights, air assist and cooling as well as the rs485-controlled exhaust system from linuxcnc, plus giving back a ton of status info back to linuxcnc
[02:08:30] <Aero-Tec> I have used that for lots of hand coding of emc
[02:08:40] <Topy44> anyway. i just finished the pcb layout
[02:08:51] <Topy44> *drumroll* ...here it is:
http://t44.org/dump/2014-11-27_02-44-33.png
[02:09:17] <Aero-Tec> never was a problem yet
[02:09:27] <Aero-Tec> not that I know of anyway
[02:09:35] <_methods> yeah i have no idea if it worked before
[02:09:37] <LeelooMinai> Topy44: Looks nice
[02:09:51] <Topy44> and an eye-candy rendering of it:
http://t44.org/dump/2014-11-27_02-57-25.png
[02:10:23] <Topy44> all safety-relevant stuff is implemented in proper logic (not µC firmware), and all inputs are very, very well protected
[02:10:58] <LeelooMinai> Topy44: You don't trust the code? :p
[02:11:19] <Topy44> nope :) but more importantly: i don't trust a microcontroller to not mess up if it gets a nasty esd spike or something
[02:11:20] <Aero-Tec> only 3 errors and I made 30 parts with out any error stoppage
[02:11:39] <Aero-Tec> it stops when there is a error
[02:11:50] <XXCoder> easy, never power it. ;) topy jk
[02:12:15] <LeelooMinai> Topy44: Is it some big laser cutter?
[02:12:20] <Topy44> if it skips a couple instructions or something it might "forget" that the lid is open or that an endstop was activated and self destruct or burn someone's eye out :)
[02:12:22] <PetefromTn_> I don't understand your problem. If the code runs thru most of the time how could the problem be the code? What kind of error are you talking about?
[02:12:56] <_methods> do you initialize all your variables at the beginning of your code somewhere?
[02:13:07] <Aero-Tec> yes
[02:13:10] <LeelooMinai> Well, hard-wiring it is more foolproof indeed
[02:13:11] <_methods> hmm
[02:13:27] <Topy44> LeelooMinai: well, its bigger than most "hobbyist" machines but still relatively small. 120x70cm working area, 60W co2 laser (we want to upgrade it to 120W soon-ish)
[02:13:35] <Aero-Tec> last error was complaining about #<SPINDLE_SPEED>
[02:13:45] <Aero-Tec> not set or not defined
[02:14:04] <Aero-Tec> I can see if I cleared it or if it is still showing
[02:14:25] <Topy44> the whole project will be GPL-ed once the boards are ready and the firmware and corresponding userspace component is done
[02:14:35] <_methods> only thing i can think is something funky is in one of your variables?
[02:14:38] <LeelooMinai> All those mirrors and delicate tubes. I wish 60watt laser diodes vere cheap and available - I would just attch it to my cnc platform and have laser-cutter
[02:14:47] <Topy44> and i'll throw the leftover boards on tindie, in case someone else abuses linuxcnc for a laser cutter :)
[02:15:06] <Topy44> LeelooMinai: well, you also need an enclosure
[02:15:09] <LeelooMinai> Hmm, laser cutting is cnc too
[02:15:24] <Topy44> a 60W laser could quiet seriously burn your skin or blind you pretty much instantly
[02:15:42] <LeelooMinai> Topy44: Yes, I plan to make one anyways - as the platform is in my bedroom/liferoom/nerdcave
[02:15:44] <Topy44> (oh, and its completely invisible, for that extra bit of fun)
[02:16:23] <LeelooMinai> I would not operate a laser without some super-safe anclosure and camera inside it
[02:16:33] <Topy44> no need for a camera
[02:16:40] <LeelooMinai> Well, camera would be nice
[02:16:43] <Topy44> just get IR-opaque plastic shielding
[02:16:49] <SpeedEvil> The onlky eye-dangeroud bit of a CO2 laser is where it's collimated
[02:16:58] <SpeedEvil> once it goes through a lens - it's not an issue
[02:17:12] <Topy44> true
[02:17:13] <SpeedEvil> well - unless you've got your eye right up next to it
[02:17:24] <SpeedEvil> Simply as the eye is completely opaque
[02:17:24] <Topy44> small amounts of reflected radiation should be harmless
[02:17:24] <LeelooMinai> Isn't that how you test those?
[02:17:25] <Topy44> still
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[02:17:39] <SpeedEvil> The only issue is thermal damage on the surface of the eye
[02:17:47] <Topy44> we use some IR-opaque polycarbonate as loading door, works fine
[02:17:50] <SpeedEvil> it's orders of magnitude safer than a visible laser
[02:18:11] <SpeedEvil> more importantly
[02:18:12] <Topy44> SpeedEvil: if it was even close to focused the thermal damage would be enough though
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[02:18:36] <Aero-Tec> error was cleared already
[02:18:41] <SpeedEvil> The shielding around the laser keeps the cuttting fumes in
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[02:18:47] <SpeedEvil> and lets you vent them properly
[02:18:51] <Topy44> well yeah, that too
[02:18:53] <Aero-Tec> I can run some more and see when it errors again
[02:18:53] <SpeedEvil> they are far more dangerousingeneral
[02:18:59] <LeelooMinai> How bad cooking the surface of an eyball can be:)
[02:19:07] <Topy44> but you can also get reflections which can be pretty dangerous
[02:19:15] <Topy44> like if you hit some metal
[02:19:22] <SpeedEvil> Topy44: reflections of a beam that's gone through a lens aren't an issue
[02:19:29] <SpeedEvil> as they cannot be other than diverging
[02:19:33] <Topy44> hm, true
[02:19:51] <SpeedEvil> If something gets into your beam path prior to the lens - then in principle - sure
[02:19:56] <Topy44> but still. you don't want invisible high power lasers without proper enclosure. you just dont. :)
[02:20:15] <Topy44> well yeah, as is obvious by the paper we use to calibrate it
[02:20:15] <LeelooMinai> SpeedEvil: I am not current with it - are there any viable laser diodes that could cut stuff like acrylic yet?
[02:20:21] <Topy44> it...instantly vaporizes
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[02:21:10] <Topy44> LeelooMinai: well one problem is that the affordable higher power laser diodes are usually near-UV/blue
[02:21:21] <Topy44> and acrylic is transparent to that
[02:21:51] <LeelooMinai> Hmm, so the best spectrum is what - infrared?
[02:21:56] <Topy44> as we found out in an attempt to calibrate a different device based on a 2W near-UV laser, which instead engraved the wood under it :)
[02:22:03] <Aero-Tec> BTW the test code machine has never erred and has run sim run a fair amount
[02:22:06] <SpeedEvil> Topy44: :)
[02:22:38] <Topy44> that was an interesting experience and one of those "oh. yeah. could have thought of that." moment :)
[02:22:43] <Topy44> *moments
[02:22:59] <Topy44> yeah, IR works best
[02:23:03] <LeelooMinai> I thought glass blocks UV mostly though
[02:23:11] <Topy44> depends on the glass
[02:23:13] <LeelooMinai> I guess acrylic is different
[02:23:46] <SpeedEvil> 'near UV' is the key
[02:23:50] <LeelooMinai> ANd they don't make IR laser diodes?
[02:23:50] <SpeedEvil> it's actually just violet
[02:23:55] <SpeedEvil> LeelooMinai: they do
[02:23:59] <SpeedEvil> but they're near-visible
[02:24:09] <SpeedEvil> ~800nm or 900nm tops for power ones
[02:24:21] <Topy44> they are actually very visible :) but most of the power is just outside the visible spectrum
[02:24:22] <LeelooMinai> And that's not low enough, right?
[02:24:26] <SpeedEvil> you can get 10um LEDs - but they suck really hard
[02:24:36] <Topy44> but they still paint the entire room in a very bright blue :)
[02:24:44] <SpeedEvil> Topy44: 808nm is almost exactly a million times dimmer than green
[02:24:57] <Topy44> right
[02:25:18] <SpeedEvil> 1mW/m^2 of 808nm beam is quite visible
[02:25:23] <SpeedEvil> if you look into it
[02:26:02] <Topy44> there are plenty of projects out there btw based on near-UV lasers
[02:26:14] <SpeedEvil> yeah
[02:26:18] <Topy44> a 2W one can cut paper, very thin wood, ...
[02:26:22] <Topy44> but its not really all that interesting
[02:26:42] <_methods> unless you hit the right person with it lol
[02:26:43] <LeelooMinai> I wonder if colored actylic would make any difference
[02:27:02] <Topy44> LeelooMinai: depends on the colour i guess :) might be worth a try
[02:27:11] <Topy44> but pure power is also an issue
[02:27:53] <Topy44> our 60W tube can cut 6mm acrylic well and 8-10mm ok-ish, though the optics are more of an issue than power
[02:28:17] <Topy44> but even 6mm wood or acrylic has to be cut pretty slowly
[02:29:17] <Topy44> i don't know the absorption specs for the various materials, but i would guess that you would need to go veeery slow with a 2W diode, and at that point you would be transferring so much heat to the surrounding material that you are lighting a fire instead of cutting :)
[02:29:19] <Aero-Tec> do you use air assist?
[02:29:22] <Topy44> yes
[02:29:32] <Topy44> well, sort of. its mostly just there to keep the fumes away from the lens
[02:29:47] <Aero-Tec> does upping the air jet power help much?
[02:29:48] <Topy44> i wanted to experiment with various types of gas and such
[02:30:02] <Topy44> don't know, its currently unregulated, just an airbrush compressor
[02:30:10] <Topy44> i'll have to do some experiments with that
[02:30:28] <Topy44> hook up the big compressor and see what influence it has
[02:30:54] <Aero-Tec> they cut metal using a air jet I believe
[02:31:04] <Topy44> yeah but not with a co2 glass tube
[02:31:17] <Topy44> you need a pulsed laser or a lot more power for that
[02:31:30] <Aero-Tec> as far as I know they use that
[02:31:30] <LeelooMinai> What do people use for cnc machining here in terms of air (for cooling, removing chips, etc.) I have normal compressor but it's noisy as hell... probably not the best choice.
[02:31:36] <Topy44> its also currently out of order because we need to rebuild the exhaust system, neighbours complained
[02:32:05] <Topy44> any advice on good and cheap filters is welcomed :) we need to get rid of the smell mostly
[02:32:13] <Topy44> noise is also an issue, but that one is more...controllable
[02:32:38] <Topy44> it will probably have to be some activated charcoal system, but that stuff is expensive...
[02:32:47] <Aero-Tec> bubble through water
[02:32:49] <Topy44> since we need large amounts of it for that kind of air throughput
[02:33:01] <Topy44> we thought about that, actually had a prototype system running once
[02:33:08] <Topy44> but didn't really work well
[02:33:10] <LeelooMinai> I saw some guy building a compressor from old fridge one and some tank, but it was too invvolved to be worth doing imho.
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[02:33:54] <LeelooMinai> Since fridges have compressors that are pretty quiet
[02:33:59] <Topy44> well fridge compressors are quiet and suitable for long runtimes, but yeah, its essentially like an airbrush compressor
[02:34:12] <Topy44> you don't get very much throughput
[02:34:31] <Aero-Tec> I would run a shop vac and a bubble tank
[02:34:58] <Topy44> we might revisit the water system at some point
[02:35:16] <Aero-Tec> for the exhaust
[02:35:17] <Topy44> but its actually quite a lot of effort to build
[02:36:23] <Aero-Tec> not really
[02:36:50] <Topy44> well our fan is quite a bit larger than a shopvac :)
[02:37:02] <Topy44> its actually a blower for a bouncy castle :)
[02:37:12] <Aero-Tec> I made one using plexy and drilled a whack of holes
[02:37:43] <Aero-Tec> double bottom
[02:38:00] <Topy44> also one more issue
[02:38:28] <Topy44> our exhaust fan is mounted to the ceiling, directly at the wall where the chimney is installed that we blow the exhaust out
[02:38:31] <Aero-Tec> sir bubbles through the top bottom plate with all the holes
[02:39:10] <Topy44> we'd have to change that construction quite a bit because the water system would have to be mounted after the fan
[02:39:12] <Aero-Tec> air
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[02:40:01] <Topy44> pretty sure the fan wouldn't appreciate water ending up in it
[02:40:05] <Aero-Tec> you do not have a encloser right?
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[02:40:11] <Topy44> hm?
[02:40:15] <Aero-Tec> your right
[02:40:41] <Topy44> of course, the fan sits in a box
[02:40:56] <Aero-Tec> not fan, laser cutter
[02:41:03] <Topy44> and the laser is in a metal enclosure
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[02:42:28] <Aero-Tec> can one not connect shop vac to enclosure and vent up chimney?
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[02:42:51] <Aero-Tec> would get it higher and may stop the complaints
[02:42:58] <Topy44> nowhere near enough power :)
[02:43:10] <Topy44> ah, rather important point:
[02:43:30] <Topy44> the fan and chimney are about 50m away from the laser
[02:43:36] <Aero-Tec> how much air do you need to move?
[02:43:43] <Topy44> and the chimney goes up another 10m or so
[02:44:33] <Aero-Tec> just thinking if your vent is high enough the smell may not be bad lower down
[02:44:40] <Topy44> well
[02:44:44] <Topy44> we are in a basement
[02:44:54] <Topy44> and we are surrounded by 4-story residential buildings
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[02:45:02] <Topy44> we can't go up _that_ far :)
[02:45:10] <Aero-Tec> ok
[02:45:19] <Aero-Tec> not your building?
[02:45:24] <Topy44> no
[02:45:26] <Aero-Tec> renting?
[02:45:29] <Topy44> we are a hackerspace. :)
[02:45:32] <Topy44> yeah
[02:45:46] <Topy44> and we are in an extremely expensive region
[02:46:16] <Topy44> we got a really good deal on this place, otherwise it would be completely unrealistic to have this much space (we have about 500m²)
[02:46:36] <Aero-Tec> so why would not a good size shop vac not move enough air and have enough head pressure to bubble though water?
[02:46:46] <zeeshan-s> man
[02:46:51] <Topy44> mostly because of the 50m of tubing
[02:46:52] <zeeshan-s> the lisle grinder is a saver
[02:47:06] <Topy44> i don't know how much throughput we actually need
[02:47:18] <Topy44> the blower we use now has more than we need
[02:47:26] <Topy44> but i mean... that thing is massive
[02:47:31] <Topy44> and its not _that_ much more than we need
[02:48:45] <Aero-Tec> if your dumping the laser fumes to the hack space and then venting through the room then yes you need a big fan
[02:49:13] <Topy44> its connected with 20cm steel tubing and runs all across the shop (other devices will be hooked up to it later, like the welding corner)
[02:49:49] <Topy44> Aero-Tec: no, of course not :)
[02:50:04] <Topy44> we are in a basement, remember? :) that would be... nasty
[02:50:08] <Aero-Tec> but if your making a negative are pressure in the enclosure and venting the fumes in a more concentrated stream it should work
[02:50:53] <Topy44> i don't see what problem the shopvac is supposed to solve
[02:51:01] <Topy44> the blower we have works and is plenty powerful
[02:51:16] <Topy44> the issue is getting a filter system that works with the kind of throughput
[02:51:21] <Topy44> to get the smell down
[02:51:40] <Aero-Tec> all the shop vac does is makes it easier to vent though a bubbler to trap the fumes
[02:51:55] <Topy44> (it doesn't have to be "my neighbours can't smell i'm growing weed"-perfect, just so that neighbours in the surrounding buildings don't complain)
[02:52:06] <Topy44> how is it easier than with the existing system?
[02:55:40] <PetefromTn_> Newest prototype Steyr Picatinny rail is finished except for some more deburring...
http://i.imgur.com/jF97fGE.jpg http://i.imgur.com/OzE1cTE.jpg
[02:56:21] <zeeshan-s> that looks so sexy!
[02:56:29] <PetefromTn_> thanks man
[02:56:31] <zeeshan-s> do you machine that in 3 setups?
[02:56:32] <Aero-Tec> was hoping that a low cost water filter would work for you is all
[02:56:39] <zeeshan-s> it looks complex :d
[02:56:49] <zeeshan-s> i mean 4 setups
[02:56:59] <Aero-Tec> help keep cost down
[02:57:16] <PetefromTn_> well actually it is machined to depth from the first side including pocketing and drilling and champfering
[02:57:31] <PetefromTn_> then it gets flipped over to remove the flashing that was held in the vise
[02:57:49] <PetefromTn_> then it is champfered on the second side in that same position
[02:58:07] <PetefromTn_> then I turn it upside down and cut the female dovetail and slot
[02:58:27] <PetefromTn_> finally it is turned over again and set at the appropriate drooped angle and faced off flat
[02:58:33] <zeeshan-s> nice man
[02:58:36] <zeeshan-s> total time?
[02:58:45] <PetefromTn_> Finally the Picatinny program is run cutting the top dovetail picatinny rail
[02:59:11] <Aero-Tec> what metal did you use?
[02:59:25] <Aero-Tec> looks good
[02:59:33] <PetefromTn_> actual machine time is about an hour and a half or so maybe two hours mostly because the female dovetail is cut manually right now.
[02:59:42] <zeeshan-s> good :)
[02:59:42] <PetefromTn_> 6061-T6
[03:00:05] <Aero-Tec> cool
[03:00:16] <Aero-Tec> I need to make some chips
[03:00:18] <Aero-Tec> later
[03:00:20] <PetefromTn_> it is cut from a hunk of 1"x2"x10.25" material
[03:00:39] <Aero-Tec> what mill are you using?
[03:00:59] <PetefromTn_> Cincinatti Arrow 500 Vertical Machining Center retrofit with LinuxCNC
[03:01:15] <Topy44> heh... guns are a bit of a weird thing for me: i really dislike them personally, but i really appreciate the craftsmanship people put into them :)
[03:01:32] <PetefromTn_> this is for a precision air rifle
[03:01:45] <PetefromTn_> for Field Target Competition
[03:02:00] <Aero-Tec> do you make them to sell them?
[03:02:02] <LeelooMinai> Ther are sports like Biathlon where guns are3 not sued to kill people:)
[03:02:18] <PetefromTn_> yeah
[03:02:28] <PetefromTn_> trying to heh
[03:02:30] <Aero-Tec> most guns are not used for that
[03:02:41] <zeeshan-s> LeelooMinai: Make your table yet?
[03:02:42] <zeeshan-s> :P
[03:02:48] <Topy44> not just metalwork, but also crazy wooden grips and case hardening and such...
[03:03:09] <Topy44> LeelooMinai: sure, i appreciate that
[03:03:23] <PetefromTn_> I cannot wait to get my CNC lathe working I have a LOT of airgun parts I want to make with it.
[03:03:33] <LeelooMinai> I try to source non-poluyester resin, so epoxy resin for some sane price first - no so easy in Canada apparently:/
[03:04:18] <Aero-Tec> I should be more clear, most guns are not used to kill people
[03:04:21] <Topy44> maybe car restoration supply stores? thats where i get mine
[03:04:49] <Aero-Tec> PetefromTn_, your a airgunner?
[03:05:14] <LeelooMinai> I could probably buy polyester one for a price that I could swallow, but they are sub-optimal from what I read, since they shrink when curing
[03:05:15] <Topy44> Aero-Tec: but all uses other than killing living things are essentially a byproduct. anyway, don't want to start a political discussion, and i am perfectly aware of the many other uses
[03:06:32] <Aero-Tec> I use mine as tree toppers
[03:06:36] <Topy44> haha
[03:06:57] <Aero-Tec> whacking off dead branches up high
[03:07:07] <Topy44> thats a...creative use :)
[03:07:47] <Aero-Tec> works very well
[03:07:49] <skunkworks> PetefromTn_: dad just powered up his mazak.. it seems to work..
[03:08:27] <Topy44> firing a gun outside of a gun range would probably get you jailed pretty quickly around here :)
[03:08:30] <Topy44> (that is: europe)
[03:09:10] <Topy44> (unless you are a licensed hunter of course or have some other legitimate use)
[03:09:29] <LeelooMinai> Or have licence to kill:)
[03:09:34] <Topy44> yeah :)
[03:10:01] <Aero-Tec> I live in Canada
[03:10:09] <Aero-Tec> and not in a city
[03:10:31] <Aero-Tec> I can shoot in my yard
[03:10:44] <Aero-Tec> and crown land
[03:10:57] <PetefromTn_> yeah I have been into precision airguns for almost 20 years and got my first air rifle when I was ten.
[03:11:15] <Aero-Tec> and other places with owners permission
[03:11:18] <PetefromTn_> skunkworks Awesome man.. glad to hear it.
[03:11:21] <Topy44> it is kind of funny that it is illegal to fire or even buy a gun without some pretty extensive licensing, but perfectly legal to buy... i dont know... lasers and stuff :)
[03:11:27] <Topy44> or fancy chemicals
[03:12:04] <SpeedEvil> It is exceptionally hard to kill someone with a laser
[03:12:09] <Topy44> yeah, true
[03:12:10] <skunkworks> color screen and everything!
[03:12:32] <SpeedEvil> Unless it's big enough to kill them if it falls on them
[03:12:34] <Aero-Tec> I have a license so I am good to go
[03:12:38] <Topy44> go for the bond-version and very, very slowly slice someone in half, but not before leaving the room and going sure they have a means of escape!
[03:12:46] <PetefromTn_> nice
[03:13:02] <PetefromTn_> color me jealous
[03:13:16] <Topy44> _anyway_, i wanted to got to bed hours ago
[03:13:17] <PetefromTn_> That machine WILL make you money man Mazak Lathes are excellent iron
[03:13:18] <skunkworks> PetefromTn_: well - it is from 85'...
[03:13:35] <skunkworks> it looks very nicely built.
[03:13:36] <Topy44> our mill is from the early 70s :)
[03:13:46] <Topy44> proper oldschool german machinery though, weighs over a ton
[03:13:54] <PetefromTn_> yeah unless it is wore the hell out and even then it will still probably make accurate parts LOL
[03:14:03] <Topy44> not a hint of slack or vibration anywhere in it
[03:14:15] <skunkworks> Topy44: our cnc* is from the 60's.. (it started ist life as nc)
[03:14:39] <Topy44> nice
[03:14:42] <Topy44> i love old machinery
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[03:15:13] <skunkworks> Topy44:
http://electronicsam.com/images/KandT/oldkandt.JPG
[03:15:18] <skunkworks> still making parts
[03:15:33] <Topy44> wow, that looks very fancy
[03:15:45] <Topy44> we have a deckel fp2
[03:15:53] <Topy44> http://www.practicalmachinist.com/vb/attachments/f14/51255d1335819069-1954-deckel-fp2-dsc03318.jpg
[03:15:53] <PetefromTn_> skunkworks Did you see my new prototype rail I just posted? check it out LOL
[03:15:55] <Topy44> one of those
[03:15:56] <skunkworks> I hear those are very nice..
[03:16:18] <jdh> looks sweet
[03:16:39] <Topy44> its brutally overengineered, like all that old machinery, but i like it :)
[03:16:40] <skunkworks> PetefromTn_: Nice work!
[03:17:05] <Topy44> every single part of it, even if its not structurally relevant, is made from cast iron or huge hunks of steel
[03:17:27] <Topy44> it was "fun" getting that thing into the basement :)
[03:17:45] <Topy44> even disassembled some parts still weigh around 300kg
[03:17:48] <SpeedEvil> Was 'crashed through the floor' part of any report into the issue?
[03:17:56] <Topy44> heh
[03:18:07] <Topy44> actually we moved in before we signed the rental contract
[03:18:08] <skunkworks> The K&T is mostly weldments and some casting.
[03:18:26] <Topy44> and we said that if it drops we'll just claim that there already was a crater in the floor when we arrived :)
[03:18:29] <PetefromTn_> really thats interesting
[03:18:37] <jdh> http://raleigh.craigslist.org/tls/4772536325.html
[03:18:41] <PetefromTn_> that is how my Cincinatti is constructed
[03:19:00] <PetefromTn_> jdh Yeah I saw that posted it yesterday
[03:19:04] <PetefromTn_> neat little lathe
[03:19:10] <skunkworks> http://electronicsam.com/images/KandT/conversion/boxframe.JPG
[03:19:25] <Topy44> we actually own a proper big old lathe, but we can't get it into our place... its too heavy and too large
[03:19:51] <Topy44> weighs around a ton, and doesn't really come apart
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[03:20:35] <Topy44> don't remember the model, but its also an old german thing from the 70s or so
[03:23:29] <Tom_L> skunkworks do you still have pics of the fest here?
[03:25:31] <skunkworks> Tom_L: these?
http://electronicsam.com/images/KandT/Fest2013/
[03:25:53] <Tom_L> yep
[03:25:54] <Tom_L> thanks
[03:25:56] <skunkworks> sorry they are not labled..
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[03:29:53] <skunkworks> most would be labled - guys standing around.
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[03:34:37] <jdh> other guys standing around
[03:34:40] <jdh> some more guys
[03:34:47] <jdh> hot linuxcnc chick standing around
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[03:42:03] <jfigie> I have my SEM motor off the machine but still connected. I have removed the cover on the position encoder. I want to get to the tach. Does anyone have experience with this kind of motor?
https://drive.google.com/file/d/0B2fj8HWg0FnNS19LN3hPaS1WeDg/view?usp=sharing
[03:43:34] <jfigie> here is there is the whole motor
https://drive.google.com/file/d/0B2fj8HWg0FnNejA4LWEtb1VRREU/view?usp=sharing
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[03:44:08] <Topy44> by the way, does linuxcnc support closed loop servo-systems?
[03:44:15] <jdh> yes
[03:44:55] <Topy44> i have been thinking about building a large-ish 3d printer using servos instead of stepper motors
[03:45:41] <jdh> for the mass and forces on a 3d printer, I would question if there is any real benefit for servos
[03:45:47] <Topy44> but grbl, the motor control library used by all 3d printer firmwares that i know of does not support closed loop systems (and can't easily be modified to do so)
[03:46:18] <Topy44> well, one thing with servos is that you don't have to give them full power all the time
[03:46:43] <Topy44> its relative to acceleration
[03:46:57] <jdh> smarter stepper drivers will reduce stepper current
[03:47:08] <Topy44> hm, i should check those out
[03:47:22] <jdh> when idle
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[04:54:19] <PetefromTn_> Getting ready to cut this Edge lit sign hopefully over the holiday weekend.
[04:54:52] <PetefromTn_> planning to cut it with carpet tape on top of a sacrificial substrate
[04:55:04] <XXCoder> PetefromTn_: good luck!
[04:55:07] <PetefromTn_> this stuff is 3/8 thick
[04:55:10] <XXCoder> do a air cut first
[04:55:24] <PetefromTn_> any recommendations for feeds and speeds on it.
[04:55:35] <zeeshan|2> what matl?
[04:55:45] <PetefromTn_> thanks for the tip but I don't really need to do air cuts with this project
[04:55:58] <PetefromTn_> it's Extruded clear Acrylic sheet
[04:56:05] <XXCoder> yea im pretty sure youre more expert than me. I was kidding
[04:56:05] <zeeshan|2> hehe
[04:56:06] <zeeshan|2> HEHE
[04:56:29] <zeeshan|2> did you buy the material already?
[04:56:36] <zeeshan|2> polycarbonate!!
[04:56:36] <PetefromTn_> it's already here
[04:56:38] <Connor> what type of endmill ?
[04:56:42] <zeeshan|2> aw
[04:56:55] <Connor> and diameter ?
[04:56:55] <PetefromTn_> just a 3/8 four flute HSS probably
[04:57:14] <Topy44> zeeshan|2: i once tried with carpet tape, it didn't stick properly, started moving after a while because of the vibration
[04:57:43] <Topy44> also, you might need cooling so it doesn
[04:57:46] <XXCoder> wonder if screws at areas that will be cut off would help for most of decocations cut
[04:57:47] <zeeshan|2> well depends on cutting forces
[04:57:48] <PetefromTn_> actually I have used Carpet tape numerous times without issues for this
[04:57:51] <XXCoder> then finally just cut it out?
[04:57:56] <zeeshan|2> if youre going too rough
[04:58:01] <zeeshan|2> it wont work :P
[04:58:05] <Topy44> the acrylic tends to melt
[04:58:21] <Connor> 5299 RPM @ 93.48 ipm
[04:58:32] <zeeshan|2> yea i wouldnt be going 93 ipm
[04:58:35] <zeeshan|2> on carpet tape
[04:58:36] <zeeshan|2> :)
[04:58:47] <PetefromTn_> The lsat time I did this I made multiple depths passes at like .125 deep leaving a finish pass of .01
[04:59:12] <PetefromTn_> then once at depth made the finish pass
[04:59:13] <renesis> topy44: i use soapy water to cut acrylic =\
[04:59:19] <Topy44> yeah, that works great
[04:59:24] <Topy44> thats what i used
[04:59:44] <Connor> @ .125 DOC, 140.22 IPM
[04:59:47] <renesis> i jigsawed some yesterday, after making the cuts i still had to plastic hammer the chunk off
[04:59:52] <Connor> http://zero-divide.net/?page=fswizard
[04:59:55] <renesis> plastic welded behind the cut
[04:59:58] <Topy44> i dont have all that much experience with acrylic though because we then built our laser cutter
[05:00:00] <renesis> stupid 1" acrylic
[05:00:21] <Topy44> heh, yeah, that happens
[05:00:59] <PetefromTn_> I have already made several of these just did not get the LED setups finished but this is much thicker material
[05:01:13] <renesis> machining, i do high feed low speed and dont always need to lube
[05:01:37] <Topy44> yeah, low spindle speed and high feedrate
[05:01:40] <PetefromTn_> It is a gift for my wife so I want it to be as perfect as possible.
[05:01:49] <zeeshan|2> yea but you also gotta remember how youre holding it
[05:01:56] <zeeshan|2> so your calculated feed isnt always optimal
[05:02:00] <LeelooMinai> Since I cannot find well-prices epoxy resin, I wondere if I could use this instead:
http://www.custombuildingproducts.com/TDS/TDS-101.pdf
[05:02:05] <renesis> using the soapy water machining makes nasty mess =( the dry chips are way easier to clean
[05:02:16] <Topy44> you can polish it quite nicely on a cotton disk with any fine polishing wax or such
[05:02:22] <LeelooMinai> Not sure what it is exactly, but it may be epoxy resin with some fillter
[05:02:30] <Topy44> acrylic polishes very nicely
[05:02:34] <renesis> ya
[05:02:35] <PetefromTn_> if I am going to use coolant I will just turn on the flood coolant I guess
[05:02:51] <LeelooMinai> They shrinkage they list there is minimal, so it may not be polyester one, I think
[05:02:51] <XXCoder> HMMM ssi
http://geekologie.com/2014/11/tis-the-season-laser-etching-a-pumpkin-p.php
[05:03:03] <Tom_L> PetefromTn_ use air or mist
[05:03:10] <PetefromTn_> why?
[05:03:15] <Tom_L> 2 flute won't gum up as much either
[05:03:28] <LeelooMinai> I wonder if I mixed it with granite pebbles, if I would get reasonable epoxy/granite mix - any opinions?
[05:03:39] <Tom_L> to keep the cutter cool
[05:03:41] <PetefromTn_> I may just screw around with a piece of drop
[05:03:47] <Tom_L> and keep the plastic from melting around it
[05:03:53] <PetefromTn_> over flood coolant?
[05:03:57] <renesis> yeah its like cutting aluminum, but much worse
[05:04:01] <Tom_L> black is much much worse than clear
[05:04:06] <Connor> With a 2 flute.. the feed rate drips to 72.79 IPM and the torque drops down too.
[05:04:08] <renesis> why you have to feed fast
[05:04:29] <renesis> if you spend to much time in one spot shit turns to goo
[05:04:32] <Topy44> acrylic is evil stuff
[05:04:38] <zeeshan|2> PetefromTn_: cheapie
[05:04:41] <Tom_L> you need very sharp tools
[05:04:42] <PetefromTn_> I was gonna feed that four flute at like 4500 at maybe 40-50 IPM
[05:04:42] <renesis> looks great, tho
[05:04:45] <Topy44> yeah
[05:04:51] <Topy44> and on the laser cutter its great
[05:04:52] <zeeshan|2> give her a titanium sculpture !
[05:04:55] <renesis> carbide is great for acrylic, doesnt dull
[05:04:57] <Topy44> but i don't want to mill it ever again :)
[05:05:00] <renesis> so you just have to manage temps
[05:05:05] <Tom_L> i use carbide on it for sure
[05:05:15] <Connor> PetefromTn_: FSWizard is saying 5300 rpm, 130 IPM
[05:05:33] <Connor> for 4 flute, 5300 RPM, 73 IPM
[05:05:35] <renesis> for pockets sometimes i would just fill with water and let it machine submerge
[05:05:38] <PetefromTn_> that sounds very high feed to me man.
[05:05:39] <Connor> for a 2 flute
[05:05:46] <renesis> recutting acrylic doesnt do anything to the tool
[05:05:58] <PetefromTn_> sure
[05:06:00] <XXCoder> zeeshan|2: tungesin ;)
[05:06:05] <renesis> and once enough chips it doesnt just fly out
[05:06:08] <XXCoder> I bet that's hell on any cnc
[05:06:15] <PetefromTn_> zeeshan|2 Hey man it is what she wanted..
[05:06:25] <zeeshan|2> hehe im teasing :p
[05:06:35] <PetefromTn_> she is a HUGE Alice in Chains fan
[05:06:41] <renesis> neat
[05:06:47] <PetefromTn_> so she wanted something I made with AIC on it.
[05:06:52] <zeeshan|2> nicer
[05:06:59] <PetefromTn_> did I show you the engraving .dxf?
[05:07:18] <zeeshan|2> no
[05:07:22] <zeeshan|2> lets see
[05:07:25] <PetefromTn_> wanna see it?
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[05:08:28] <PetefromTn_> http://i.imgur.com/cw904nZ.jpg
[05:08:37] <zeeshan|2> :D
[05:08:40] <zeeshan|2> that looks awesome!!
[05:08:49] <zeeshan|2> did you design that?
[05:08:57] <PetefromTn_> well technically no
[05:09:07] <PetefromTn_> I downloaded a pic of their logo which is similar
[05:09:15] <PetefromTn_> then I imported it into my autocad clone
[05:09:19] <PetefromTn_> and kinda traced it out.
[05:09:25] <zeeshan|2> looks really good :)
[05:09:26] <PetefromTn_> Then I realized that thier logo sucked
[05:09:33] <PetefromTn_> so I kinda fixed it
[05:09:40] <PetefromTn_> and added some other details
[05:09:43] <PetefromTn_> thanks
[05:09:48] <zeeshan|2> im gooogling it
[05:09:55] <zeeshan|2> yours looks different :)
[05:09:57] <PetefromTn_> she seemed to like it so I hope I can make it look sweet
[05:10:14] <PetefromTn_> yeah there are actually several different versions of that logo
[05:10:24] <PetefromTn_> I traced from the all white and black one
[05:13:29] <PetefromTn_> http://hdwallpapersbase.com/wp-content/uploads/2013/06/Alice-In-Chains-logo-wallpaper.jpg
[05:13:42] <PetefromTn_> I thought about adding that logo underneath the sun logo
[05:14:00] <PetefromTn_> but when I looked at it I think it would be a real bitch to trace over.
[05:14:12] <PetefromTn_> so I guess I am lazy LOL
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[05:19:55] <zeeshan|2> do it!
[05:19:59] <zeeshan|2> that will look bad ass
[05:20:08] <zeeshan|2> maybe you can use splines?
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[05:20:16] <zeeshan|2> yea i think you can do that with splines
[05:20:17] <PetefromTn_> I did use splines
[05:20:29] <zeeshan|2> looks like 20 min of tracing
[05:20:30] <zeeshan|2> haha
[05:20:32] <PetefromTn_> but those shapes are a real bitch I think
[05:20:47] <PetefromTn_> Shit maybe 2 hours LOL
[05:20:51] <zeeshan|2> haha
[05:20:56] <zeeshan|2> she's worth it!
[05:20:57] <zeeshan|2> DO IT!! :P
[05:21:02] <PetefromTn_> Damn right she is
[05:21:17] <PetefromTn_> anyone who could put up with my bullshit is worth it heh
[05:21:18] <zeeshan|2> my significant others bday is on dec 1
[05:21:21] <zeeshan|2> i gotta figure out a present :/
[05:21:29] <zeeshan|2> my cnc mill doesnt run :{
[05:22:02] <PetefromTn_> she got the idea from another AIC fan
[05:22:18] <PetefromTn_> apparently this guys wife has a CNC plasma cutter
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[05:22:32] <PetefromTn_> and he made some steel plate yard art with thier logos on it.
[05:22:39] <PetefromTn_> looked pretty cool actually
[05:23:20] <Connor> PetefromTn_:
http://www.engraverssolutions.com/PDFs/tips&tricks-routing_acrylic.pdf
[05:24:23] <XXCoder> man I need to complete my cnc
[05:24:29] <XXCoder> so I can have fun
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[05:26:29] <PetefromTn_> jeez according to that you want to run really high speed spindle and relatively slow feeds considering the spindle speed
[05:31:26] <XXCoder> probably some coolant to keep plastic cool
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[08:00:14] <Deejay> moin
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[08:08:17] <cathode> hi guys
[08:10:32] <cathode> i'm designing a fence for my manual bandsaw (not a cnc machine) and i thought it would be handy to have a leadscrew with a handwheel on the front to make fine adjustments. i'd probably use a pair of nuts with a light spring pushing them apart to reduce backlash. should i go with acme threaded rod, or would normal threaded rod be okay?
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[08:18:24] <archivist> spring should be above forces
[08:18:55] <archivist> screw type depends on accuracy desired/expected
[08:19:52] <cathode> ok
[08:20:07] <cathode> what do you mean "spring should be above forces"?
[08:20:12] <archivist> but its a band saw and they can wear the blade if you do curved work, any fence then gets in the way
[08:20:30] <archivist> your backlash spring you mentioned
[08:20:32] <cathode> yes, the fence would be detachable
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[08:24:01] <archivist> the cutting force or you pushing material against the fence
[08:25:28] <cathode> the fence would get locked down after being positioned
[08:25:57] <cathode> via a cam-action lever with most likely some hard rubber pad that would grip against the rail that the fence moves on
[08:26:00] <archivist> are you sure you need any backlash control then :)
[08:26:04] <cathode> yes
[08:26:27] <cathode> if i use threaded rod with 8 threads per inch, then 1/8th turn of the wheel means the fence moves by exactly 1/8"
[08:26:47] <cathode> so i would want the wheel to be always accurate
[08:27:09] <archivist> as long as you work from one direction that is the case without any backlash control
[08:27:13] <cathode> right
[08:27:20] <cathode> but as soon as i change direction.... :)
[08:27:25] <archivist> like on old manual lathes
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[08:28:21] <cathode> i mean it doesn't have to be accurate to a ten-thousandth of an inch or anything ... but threads typically have what, maybe 0.025" of play? or more?
[08:29:06] <cathode> one of the things i want to use this for is cutting wood veneer. it would be quite handy to be able to move the wheel by 1/16th of a turn, make a cut, move the wheel 1/16th of a turn, make another cut, etc
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[08:29:43] <cathode> er
[08:30:03] <cathode> sorry, if it's 8tpi then it would be 8 turns of the wheel for 1 inch so 1/8" would be 1 turn
[08:30:15] <cathode> it is late, my brain is not functioning well
[08:30:16] <archivist> I have see sawn veneer on old clocks
[08:30:57] <archivist> seen and repaired I should say
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[08:33:53] <cathode> hmm
[08:34:12] <cathode> here's my project currently:
http://lumberjocks.com/cathode/blog/43306
[08:34:12] <cathode> :)
[08:34:24] <archivist> make sure the leadscrew itself has end float control too
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[08:36:03] <cathode> ah right
[08:36:09] <cathode> otherwise the entire leadscrew would move around
[08:36:33] <cathode> i don't have a lathe. if i bought a piece of raw threaded rod how should i make smooth parts for it to rest in a bearing?
[08:36:47] <archivist> english dial clock had a built up bezel similar to your wheel
[08:37:24] <cathode> it turned out nice
[08:37:30] <cathode> they feel extremely solid
[08:37:57] <cathode> and the hard maple rim should stand up well to the pressure of a highly tensioned bandsaw blade pressing on it
[08:38:26] <archivist> you can bolt two bearings(on the frame) and then use lock nuts on the rod to remove play
[08:39:02] <cathode> i'd have to get bearings that had the same ID as the OD of the threaded rod as measured at the peaks of the threads, right?
[08:39:24] <cathode> hmmm i might just skip this whole thing for now, lol
[08:39:44] <archivist> or make some bushing
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[08:40:17] <archivist> there are plenty cheap suitable bearings
[08:42:47] <archivist> I have two aluminium plates clamping a cheap ball bearing with nuts either side of the inner for a very small amount of play on plain threaded rod
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[08:44:03] <cathode> hmm ok
[08:44:37] <archivist> pic in a minute
[08:44:42] <cathode> i really need to get a small machinists lathe :)
[08:45:09] <archivist> I use a pillar drill to make the holes
[08:45:53] <cathode> pillar drill?
[08:45:56] <cathode> you mean a drill press?
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[08:49:13] <archivist> yes
http://www.collection.archivist.info/archive/DJCPD/PD/2014/2014_11_27_barber_colman/IMG_1855.JPG
[08:50:09] <archivist> was not sure how permanent the stuff would be so did it as fast and cheap as possible
[08:50:27] <cathode> ah
[08:50:31] <cathode> wow that's some heavy plate
[08:50:34] <cathode> is that 1"
[08:51:55] <archivist> 10mm and 1/4"
[08:52:51] <archivist> just used a hole saw
[08:52:52] <cathode> oh, what size is the rod then?
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[08:53:32] <archivist> 10mm
[08:54:07] <cathode> huh. the plate looks really thick
[08:54:30] <archivist> perspective, camera is close
[08:54:52] <archivist> 10mm threaded rod is 9.86
[08:55:33] <archivist> before I added that
http://127.0.0.1/hacks/showresult.php?prog=1&srcprog=searchv11.php&srcdata=title&Type=PD&Accn_no=9430&subject=27332
[08:56:21] <archivist> oops
http://www.collection.archivist.info/showresult.php?prog=1&srcprog=searchv13.php&srcdata=title&Type=PD&Accn_no=9430&subject=27332
[08:59:04] <cathode> that looks like a lathe but ... it's strange
[08:59:45] <syyl_> cute gear hobber :D
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[09:05:44] <archivist> http://www.collection.archivist.info/searchv13.php?searchstr=barber+colman
[09:07:03] <archivist> all the modifications can be removed so it can be put back to original, no drilling extra holes
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[09:11:19] <cathode> interesting
[09:11:33] <cathode> you restored that whole machine from the rusted hunk it started as, i presume?
[09:14:32] <archivist> yes, although I did not completely take it to bits, worked around and through, to clean it internally, some rusted stuff like the slide had to come apart
[09:15:02] <cathode> cool
[09:15:37] <archivist> motor needs new sleeve bearings one day
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[09:35:53] <Loetmichel> sr: sleeve bearings is te brass7bronce kind?
[09:36:11] <Loetmichel> as opposed to ball nearings?
[09:36:16] <Loetmichel> archivist
[09:36:33] * Loetmichel sorts his fingers... again
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[09:41:07] <archivist_herron> yes bronze
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[11:36:19] * Loetmichel just got his salary... if that notebook was aviable in 14" i would TOTALLY buy it now... black numbers on the accound cant be, thats unnatural ;-) -> http://www.itsco.de/notebooks/notebook_lenovo_thinkpad_w510_intel_core_i7-620m_vpro_2x_266ghz_4391_i26_11930_0.htm
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[12:47:50] <MrSun-uthus> soo .. looks like my "ballnose" (yes cmt said it was one of those) .. was a bullnose :P
[12:51:04] <SpeedEvil> :)
[12:52:52] <SpeedEvil> This is sort-of-on-topic as I'm sort of pondering these as rails for a roof-based access platform
[12:52:57] <SpeedEvil> http://www.scaffolding-direct.co.uk/alloy-tube-48-3mm-x-6m-length-for-tube-clamps-and-scaffolding.aspx
[12:53:19] <SpeedEvil> A naive calculation leads me to the conclusion that I can bend this tube to ~2m radius without exceeding the elastic limit
[12:53:27] <SpeedEvil> how do I work out when it will buckle?
[12:53:35] <SpeedEvil> assuming no point forces on it
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[12:58:27] <jthornton> what are you going to bend it with?
[12:59:02] <SpeedEvil> I'm just wondering in the general case
[12:59:21] <SpeedEvil> I'm wondering about using it to support heavy loads
[12:59:39] <SpeedEvil> though in practice - bending that much would be unlikely
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[13:00:21] <jthornton> I can bend up to 3" stainless tubing with a 5" radius but it does reduce the ID a tad in the bend area
[13:00:40] <SpeedEvil> but that's likely supported with proper mandrells
[13:01:13] <jthornton> yea if you have a mandrel bender... they are very expensive
[13:01:27] <jthornton> and are usually used on thin wall tubing
[13:02:11] <SpeedEvil> I was more meaning - is there a rule of thumb to tell what's the point at which i can expect buckling - in a pure bending load with no point stress
[13:02:43] <jthornton> ah I see now
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[13:04:18] <jthornton> the calculations depend on distance between supports, load, load location, and bending strength of the material
[13:04:28] <jthornton> quite complicated I think
[13:05:00] <SpeedEvil> yeah.
[13:05:15] * SpeedEvil wishes FEA was easier.
[13:05:24] <jthornton> or use my Grandpa's calculations... if it looks right it probably is
[13:05:29] <SpeedEvil> hah
[13:05:49] <SpeedEvil> yeah - that relies on having your common sense calibrated.
[13:06:19] <jthornton> yea
[13:07:25] <jthornton> happy thanksgiving
[13:16:07] <Jymmm> oink oink
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[13:33:07] <archivist> SpeedEvil, they dont quote ductility
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[13:42:33] <MrSun_uthus> damn the details shows a bit better when the router bit has the right form ... :P
[13:42:53] <MrSun_uthus> before it gouged away material that shouldnt be removed .. as it thought it was a ballnose when it actualy was a bull :P
[13:45:53] <SpeedEvil> archivist: ?
[13:46:00] <SpeedEvil> Oh - well - I was just assuming from the alloy
[13:46:56] <archivist> bending may snap it if not ductile enough
[13:47:23] <SpeedEvil> yeah - I was using the elastic limit of 5% I found
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[14:47:48] <archivist> seems over priced
http://www.ebay.co.uk/itm/Broken-Tap-Remover-/291294944622
[14:52:00] <CaptHindsight> gobble gobble
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[14:53:23] <_methods> turkey lurkey
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[15:44:02] <FinboySlick> archivist: Is that like a sinker-edm?
[15:44:18] <archivist> yes
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[15:45:33] <archivist> there have been articles in model engineers workshop for simple ones
[15:45:43] <FinboySlick> Interesting that they'd use a drill chuck.
[15:46:19] <FinboySlick> I guess it's conductive enough but it seems a bit odd to me.
[15:46:21] <archivist> lazy way of fitting small bars to the spindle
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[15:49:30] <SpeedEvil> collet takes rather longer
[15:49:44] <SpeedEvil> and if you're actually using bar-stock - and the torque is ~0 - the chuck won't wear
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[16:11:41] <Tecan> <XXCoder> laser etched food tastes so nasty
[16:11:50] <Tecan> you wouldnt believe
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[16:11:55] <XXCoder> lol ok
[16:12:05] <XXCoder> reading logs eh
[16:12:11] <Tecan> ?
[16:12:22] <Tecan> oh yeah from early
[16:13:07] <Tecan> should have specified in reference to the lasered pumpkin pie
[16:13:21] <XXCoder> yeah bet others are confused
[16:13:28] <XXCoder> http://geekologie.com/2014/11/tis-the-season-laser-etching-a-pumpkin-p.php
[16:13:33] <XXCoder> gonna love clcl
[16:13:46] * Tecan puts the bong on the shelf out of reach
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[16:15:06] <Tecan> what would work better is lasering that gold foil
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[16:15:34] <Tecan> edible gold foil for food
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[16:17:21] <XXCoder> cool
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[16:26:02] <Tecan> or rig a printer up with food coloring somehow and spray patterns on
[16:26:36] <XXCoder> yeah
[16:26:44] <XXCoder> or just cut patterns on food
[16:26:53] <XXCoder> assuming food is rigid enough
[16:26:59] <XXCoder> of course you need very clean tools!
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[16:28:27] <Tecan> a metal stencil ontop of baked peice
[16:28:35] <Tecan> during baking
[16:29:30] <Tecan> anything but laser
[16:29:44] <XXCoder> nice idea, that
[16:29:51] <XXCoder> cnc made complex stencol
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[16:35:45] <Tecan> cant believe it hasnt been done
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[16:48:14] <XXCoder> Tecan:
https://i.imgur.com/YW9mdGz.gif
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[16:48:35] <XXCoder> Tecan: yeah sometimes it just seems olvious but not
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[17:13:10] <JT-Shop> just make a krack-a-snack extruder
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[18:48:04] <humble_s3a_bass> "▼"
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[18:55:54] <ssi> triangle?
[18:56:26] <humble_sea_bass> just leaving irssi for weechat, stray setting
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[19:14:03] <ssi> lol
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[19:54:06] <PetefromTn_> Happy Thanksgiving everyone
[19:55:25] <ssi> hey pete
[19:55:45] <PetefromTn_> hey
[19:55:53] * LeelooMinai is tempted to buy this: http://www.busybeetools.com/products/SURFACE-PLATE-12IN.-X-18IN.-X-3IN..html
[19:57:15] <LeelooMinai> The question is what the shipping they will quote
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[20:16:55] <cathode> hey guys. happy thanksgiving (for those in the USA)
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[20:18:23] <cathode> got a question about balancing wheels (20" diameter). they're wooden spoked wheels i made for bandsaw blade to ride on. i'm thinking of using epoxy putty to add weight where necessary around the inside rim of the wheel for balance. does that seem like a logical idea?
[20:19:16] <cathode> and balancing the wheel on top of a large marble or a pool ball or something so i can see where it tips towards
[20:23:18] <SpeedEvil> don't
[20:23:21] <SpeedEvil> simply remove wood
[20:23:35] <SpeedEvil> also - spoked - why the hell
[20:24:59] <cathode> https://dl.dropboxusercontent.com/u/88948814/Shop/Bandsaw/2014-10-23%2021.17.12.jpg
[20:25:37] <SpeedEvil> What's wrong with a solid disk of MDF or ply
[20:26:18] <cathode> lots of things
[20:26:24] <SpeedEvil> you have computed the G loads on that?
[20:26:32] <cathode> no
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[20:26:44] <cathode> but the spokes are hickory
[20:27:03] <cathode> one of the stiffest and highest strength woods out there
[20:27:07] <renesis> why are we back in the 1700s
[20:27:09] <cathode> the rim is hard maple
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[20:27:33] <SpeedEvil> cathode: yes - and MDF or ply is much much more dimensionally stable.
[20:27:51] <SpeedEvil> Neglecting that.
[20:27:53] <cathode> mmmk then use that for your own project..
[20:27:57] <SpeedEvil> Have you trued the outside of the wheel
[20:28:03] <cathode> roughly, yes
[20:28:11] <cathode> it's a little oversize right now
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[20:29:48] <_methods> you can add inserts too to add weight
[20:29:53] <_methods> instead of removing material
[20:30:32] <cathode> _methods - yeah i was asking about using epoxy putty
[20:30:44] <cathode> and sticking small bits of it around the inside rim until it's balanced
[20:30:59] <cathode> the whole thing is going to have paint over the top
[20:31:26] <_methods> yeah
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[20:35:46] <cathode> ok thanks
[20:36:03] * LeelooMinai sighs
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[20:36:27] <LeelooMinai> My local place just quoted me a bargain price of $250 + tax for a gallon of epoxy
[20:36:41] <ssi> what kind of epoxy?
[20:36:43] <SpeedEvil> LeelooMinai: At that price, I will ship you some.
[20:36:48] <ssi> seriously
[20:37:04] <LeelooMinai> Just epoxy resin
[20:37:22] <LeelooMinai> I thought I could save on shipping and make my sister pick it locally:)
[20:37:27] <ssi> I pay about $100 us for west epoxy
[20:37:35] <ssi> and anther $20 or so for the hardener
[20:37:49] <LeelooMinai> ssi: A gallon?
[20:37:58] <ssi> yeah
[20:38:13] <cathode> that seems really high
[20:38:22] <cathode> but i dont buy epoxy much so...
[20:38:36] <ssi> 1.2 gal epoxy kit at spruce is $137.95
[20:38:41] <ssi> but I think I get around 15% discount on that
[20:38:46] <ssi> http://www.aircraftspruce.com/catalog/cmpages/westepoxy.php?clickkey=279624
[20:38:49] <LeelooMinai> Well, I searched all places online - that's not what I can see. Crazy places like Lee Valley tools sell a litre for $80 or so:)
[20:39:02] <cathode> http://www.ebay.com/itm/MARINE-GRADE-EPOXY-RESIN-1-GALLON-KIT-UV-RESISTANT-CLEAR-NON-TOXIC-/230732090356
[20:39:06] <ssi> epoxy's not cheap, but it's not $250/gal either
[20:39:09] <ssi> unless its something exotic
[20:39:12] <LeelooMinai> Sometimes living in Canada sucks
[20:39:41] <cathode> oh my bad, that's a surface treatment
[20:39:44] <cathode> not an adhesive
[20:41:16] <LeelooMinai> I am looking for 100% solids. I think all those surface/garage/floor treatments have a lot of stuff that evaporates and makes the resin shrink
[20:41:52] <ssi> http://www.ebay.com/itm/EPOXY-RESIN-BOAT-BUILDING-MARINE-GRADE-HiIGH-STRENGHT-FIBERGLASSING-1-GAL-KIT/221376042360?_trksid=p2047675.c100010.m2109&_trkparms=aid%3D555012%26algo%3DPW.MBE%26ao%3D1%26asc%3D27538%26meid%3D29ad3954176f4dc695d4dfc1966ce206%26pid%3D100010%26prg%3D11353%26rk%3D4%26rkt%3D24%26mehot%3Dpp%26sd%3D230732090356
[20:41:54] <LeelooMinai> But makes it level better I presume
[20:42:30] <LeelooMinai> ssi: And they will make customs fee another $100:)
[20:42:47] <ssi> but it's in ontario! ;)
[20:43:48] <LeelooMinai> lol, in California - I guess there's a city called Ontario, wierd
[20:44:24] <DaViruz> how useful would a 25W laser be for cutting thin plywood (1/8" to 1/4") and acrylic of rougly the same dimension?
[20:44:38] <DaViruz> a quality laser cutter in case that matters.
[20:44:39] <ssi> 1/4" might be a bit dicey
[20:44:50] <ssi> 40W cuts 1/4" pretty well
[20:44:50] <LeelooMinai> DaViruz: From yesterday - for acrylic you need specific wavelength
[20:44:51] <DaViruz> i suspect it does with regards to focus and such
[20:45:05] <DaViruz> this machine has been used for acrylic specifically
[20:45:08] <DaViruz> and 1/8" specifically
[20:45:11] <ssi> CO2 lasers cut acrylic beautifully
[20:45:26] <ssi> 25W likely will cut 1/4" acrylic ok, but you'll need the right lens
[20:45:30] <LeelooMinai> DaViruz: For example blue laser will not cut it
[20:45:37] <DaViruz> this is a CO2 laser.
[20:45:45] <LeelooMinai> A, ok, then it will work
[20:45:45] <DaViruz> i'm also contemplating a laser tube upgrade
[20:45:57] reventlov is now known as Reventlov
[20:46:30] <DaViruz> http://laserprouk.com/laser-engraving-machines-mercury.html
[20:46:34] <DaViruz> it's one of these deals
[20:46:58] <DaViruz> it seems rather nice (to my clueless eyes) :)
[20:47:03] <LeelooMinai> Seems like a cheap hobby budget machine to me... or not:)
[20:47:26] -!- zeitue [zeitue!~z@67.221.139.166] has joined #linuxcnc
[20:47:39] <DaViruz> i'm pretty reluctant to get one of those chinese machines, though they seem to work pretty well based on various youtube reviewers
[20:48:28] <LeelooMinai> ssi is an expert on laser cutters - including burning half of the house:)
[20:48:32] <DaViruz> finding a non-chinese laser cutter in sweden that's somewhat affordable doesn't happen too often
[20:48:42] -!- b_b has quit [Remote host closed the connection]
[20:48:44] <DaViruz> else there's this one..
http://www.blocket.se/dalarna/Laserskarmaskin_Mazak_Turbo_X_48_1KW_57435265.htm?ca=9&w=3
[20:48:45] <ssi> yea I have a pretty good idea of what works and what doesn't :P
[20:49:04] <DaViruz> it's not far from here either, walking distance.. :)
[20:49:11] <DaViruz> though $60k is a bit hefty
[20:49:29] <LeelooMinai> That would not fit in my room, so I have to pass
[20:49:49] <DaViruz> i'm not too fond of the oxygen consumption either
[20:50:05] <JT-Shop> dang UPS waits till I ship something to Turkey to give me the preferred rate
[20:50:35] <DaViruz> ssi: what's the right lens?
[20:50:37] <_methods> better late than never?
[20:50:44] <DaViruz> (for 25W CO2 1/4" acrylic)
[20:50:58] <JT-Shop> yea, I think they just got competitive with USPS now
[20:51:34] <DaViruz> ups mail innovations is pretty cool. i can get a moderate size box from the us to sweden for $1.6 which is just ridiculous.
[20:51:40] <DaViruz> i can't even send a domestic postcard for that
[20:52:05] <_methods> ugh i need lemon fanta
[20:52:14] <ssi> DaViruz: I'd probably start with a 2" lens, but you may need longer, like a 3"
[20:52:16] <_methods> need to get it shipped from europe
[20:52:25] <DaViruz> oh focal distance
[20:52:46] <DaViruz> is there a benefit to shorter?
[20:52:53] <_methods> smaller hip
[20:52:54] <JT-Shop> last box I shipped to turkey cost me $125 for 4 lbs
[20:52:59] <_methods> means you can cut faster
[20:53:06] <DaViruz> hip?
[20:53:07] <CaptHindsight> DaViruz: from Denmark to Sweden?
[20:53:16] <DaViruz> CaptHindsight: USA to sweden
[20:53:23] <_methods> yes the beam hip or waist
[20:53:35] <DaViruz> i'll have to research that :)
[20:53:44] <_methods> the focal area that cuts best
[20:53:48] <DaViruz> it seems to ship with a 2" lens
[20:53:55] <_methods> the optimal focal area
[20:53:57] <ssi> shorter means smaller, hotter spot
[20:53:59] <DaViruz> with a bunch of others available as options
[20:54:06] <ssi> longer means wider depth of field
[20:54:18] <DaViruz> oh.
[20:54:47] <DaViruz> how about plywood 1/4" plywood?
[20:55:02] <DaViruz> that's probably more important than acrylic
[20:55:44] <ssi> plywood is harder
[20:55:55] <_methods> an 80w laser should cut that fine i think
[20:56:00] <ssi> my 40W laser could cut 1/4" plywood reasonably well, but only certain types
[20:56:01] <_methods> i don't know much about hobby lasers
[20:56:12] <ssi> sandeply cut well, but oak plywood didn't
[20:56:17] <ssi> the more layers, the harder it is to cut
[20:56:19] <ssi> cause of the glue
[20:56:33] <DaViruz> i see
[20:57:09] <LeelooMinai> I wonder if I can cut 0.125" stainless sheet at home
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[20:57:21] <ssi> with what?
[20:57:37] <ssi> almost certainly not with a laser
[20:57:39] <LeelooMinai> The only thing I have that could touch that is angle grinder and those cut discs
[20:57:53] <LeelooMinai> Not sure if that would work well (?)
[20:58:01] <DaViruz> that'll work fine
[20:58:24] <LeelooMinai> May be a bit scary experience
[20:58:53] <DaViruz> it creates a lot of dust
[20:59:26] <DaViruz> the thinner the disc the easier the cut, and it generates less dust
[20:59:47] <LeelooMinai> Too bad it's cold now outside. I guess I could wear a dust mask
[21:00:33] <LeelooMinai> How can I measure how flat a sheet like that is?
[21:01:13] <ssi> surface plate
[21:01:16] <SpeedEvil> LeelooMinai: surface plate
[21:01:18] <ssi> laser interferometry
[21:01:27] <SpeedEvil> profilometer
[21:01:30] <ssi> clever use of a decent straightedge
[21:01:32] <SpeedEvil> trained ducks
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[21:01:42] <LeelooMinai> Well, I don't have a surface plate. Maybe I will have one soon, but it will be smaller then the plate I cut...
[21:01:54] <SpeedEvil> you can cut 3mm stainless with a decent sharp hacksaw
[21:01:58] <ssi> how flat do you need it to be?
[21:02:25] <LeelooMinai> I cannot really make it flat - I am just curious how flat it is by itself
[21:02:27] <SpeedEvil> LeelooMinai: if it's cold outside, you need a thicker disk
[21:02:33] <SpeedEvil> LeelooMinai: and a bigger angle grinder
[21:02:36] <SpeedEvil> more sparks
[21:03:11] <zeeshan|2> fak
[21:03:14] <SpeedEvil> A 3mm sheet will not meaningfully stay flat over any significant distance
[21:03:16] <zeeshan|2> this modbus programming taking forever
[21:03:33] <LeelooMinai> BTW, I found a grout that costs $33 per 1.1L - maybe I can use it for my epoxy/granite table
[21:03:47] <LeelooMinai> That's the only thing that gives me a hope of making it for now
[21:04:32] <LeelooMinai> http://www.homedepot.ca/product/ceg-lite-100-solids-commercial-epoxy-grout-150-382-bone-11-l/983083
[21:04:47] <SpeedEvil> LeelooMinai: what sized object do you want
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[21:05:05] <LeelooMinai> It seems to be 100% solids epoxy mixed with something - probably something like very fine sand, so should work?
[21:05:13] <SpeedEvil> seems likely
[21:05:38] <LeelooMinai> I read the datashhet and they say that typical shrinkage is 0.08% and I think 0.2% max
[21:05:48] <LeelooMinai> So seems perfect
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[21:06:04] <LeelooMinai> SpeedEvil: 21" by 21" by maybe 1.5"
[21:06:18] <LeelooMinai> Not sure if one box would be enough - maybe
[21:06:32] <SpeedEvil> At that size, an actual bit of rock might be simpler
[21:06:48] <LeelooMinai> E, what?
[21:06:53] <LeelooMinai> What do you mean simpler?
[21:07:00] <SpeedEvil> cheaper, easier
[21:07:18] <LeelooMinai> Bit or rock? What is that? :)
[21:07:22] <LeelooMinai> of*
[21:07:35] <SpeedEvil> granite
[21:07:53] <LeelooMinai> And how will I make holes or slots in that?
[21:07:59] <LeelooMinai> A lot of them
[21:08:02] <SpeedEvil> angle grinder
[21:08:04] <pcw_home> slowly
[21:08:15] <LeelooMinai> That does not sound simpler:)
[21:08:33] <DaViruz> chisel and hammer!
[21:09:08] <SpeedEvil> Simply remove anything that doesn't look like a CNC base
[21:09:13] <ssi> hahah
[21:09:50] <DaViruz> remember to do it simply.
[21:10:42] <LeelooMinai> You are all spoiled because you already have some expensive/big machines that can help you. YOu would not sing that nice if all you had were simple tools and no money:p
[21:11:18] <ssi> we all started somewheer
[21:11:24] <SpeedEvil> LeelooMinai: I'm on a low, fixed income, and have fuck-all in proper tooling
[21:11:28] <zeeshan|2> we also didnt spend a week
[21:11:31] <zeeshan|2> trying to figure out what to use for a table
[21:11:42] -!- pfred1 [pfred1!~pfred1@unaffiliated/pfred1] has joined #linuxcnc
[21:11:43] * zeeshan|2 hides
[21:11:56] <LeelooMinai> zeeshan|2: My point exactly - you did not have to:)
[21:12:15] <zeeshan|2> call up b&d steel in burlington and get yourself a mic6 plate 1/2
[21:12:23] <zeeshan|2> for 120$ 24x24x.5
[21:12:24] <zeeshan|2> enuf
[21:13:07] <ssi> thing is, for less money than you've poured into this machine already, you could have bought a decent cheap used mill
[21:13:19] <zeeshan|2> ssi mean
[21:13:26] <LeelooMinai> I don't want a mill. I want a cnc platform.
[21:13:31] <DaViruz> what's the fun in that
[21:13:35] <zeeshan|2> wut
[21:13:37] <ssi> if you had a mill, you could make your cnc machine
[21:13:37] <zeeshan|2> you have a mill
[21:13:50] <pfred1> I have a mill
[21:13:53] <zeeshan|2> you dont think you can mount a laser cutter nozzle on a mill? :P
[21:14:06] <pfred1> not easily no
[21:14:08] <LeelooMinai> zeeshan|2: I don't see why - a diode one
[21:14:29] <zeeshan|2> just tape it to the spindle
[21:14:52] <LeelooMinai> zeeshan|2: You think only spindles can be attached to z-bed?
[21:15:18] <zeeshan|2> LeelooMinai: im not gonna waste my time :)
[21:15:19] <zeeshan|2> do what you want
[21:15:23] <LeelooMinai> imho anything can be
[21:15:23] <zeeshan|2> ssi hi
[21:15:29] <zeeshan|2> did you get your new laser parts? :D
[21:15:41] <ssi> not yet
[21:15:51] <zeeshan|2> i hope youre going to build it bigger and better!
[21:15:53] <ssi> have other priorities honestly
[21:15:55] <zeeshan|2> so you can cut stianless sheet
[21:15:55] <zeeshan|2> :D
[21:15:57] <ssi> but yes eventually
[21:16:32] <LeelooMinai> Like fireproof walls? :)
[21:16:56] * SpeedEvil is seriously considering a large CNC platform built from wood :)
[21:17:49] <LeelooMinai> SpeedEvil: Do you want to join "mr dried bubble gum" guy?
[21:17:52] <pfred1> SpeedEvil I have a small one built from wood and I am in the process of bolting more steel to it now
[21:18:43] <SpeedEvil> I should at some point in the near future work out cutting forces.
[21:18:59] <pfred1> there are online calculators
[21:19:07] <SpeedEvil> yeah
[21:19:09] <ssi> just make zeeshan do it
[21:19:16] <LeelooMinai> SpeedEvil: I hope you are not going to duplicate this design:
https://www.youtube.com/watch?v=gKBp3YJEaFQ
[21:19:18] <zeeshan|2> haha ssi
[21:19:21] <zeeshan|2> fak you
[21:19:23] <zeeshan|2> i aint no calculator
[21:19:28] <ssi> you love doing that stuff :)
[21:19:46] <SpeedEvil> LeelooMinai: I want to be able to cut more than polystyrene
[21:20:12] <SpeedEvil> LeelooMinai: I'm aiming at ~100kgf causing .1mm deflection
[21:20:12] <ssi> zeeshan|2: I'm gonna build a 4x8 router before I do another laser
[21:20:29] <zeeshan|2> hm
[21:20:35] <LeelooMinai> SpeedEvil: You will use ironwood? :)
[21:20:42] <SpeedEvil> LeelooMinai: over a 2.4*4.8m bed
[21:20:43] <SpeedEvil> err
[21:20:45] <zeeshan|2> thats huge
[21:20:45] <SpeedEvil> 1.2*2.4
[21:20:51] <SpeedEvil> which is still huge
[21:20:57] <SpeedEvil> 1.3*2.5 actually
[21:21:05] <zeeshan|2> speedevil
[21:21:08] <zeeshan|2> can you talk in human units please
[21:21:10] * zeeshan|2 hides
[21:21:11] <zeeshan|2> :-)
[21:21:16] <ssi> lol
[21:21:21] <SpeedEvil> LeelooMinai: no, plywood, properly supported
[21:21:24] <LeelooMinai> He is talking in human units...
[21:21:33] <zeeshan|2> yes
[21:21:36] <zeeshan|2> the units of kg
[21:21:42] <zeeshan|2> that is a massive mass
[21:21:43] <zeeshan|2> vs a lb
[21:21:45] <zeeshan|2> fak you!
[21:22:08] <ssi> what are you on about
[21:22:12] <zeeshan|2> trolling
[21:22:18] <ssi> stahp
[21:22:32] <LeelooMinai> I would be very happy if all imperial units were just gone one sunny day:)
[21:22:40] <zeeshan|2> sucks for you
[21:22:42] <zeeshan|2> we're in canada
[21:22:45] <zeeshan|2> and its not changing anytime soon
[21:22:47] <zeeshan|2> i love my imperial units
[21:22:52] <zeeshan|2> when it comes to machining :P
[21:23:05] <LeelooMinai> Not sure why...
[21:23:12] <SpeedEvil> zeeshan|2: 1000N then
[21:23:12] <zeeshan|2> because everything around you is in it?
[21:23:19] <zeeshan|2> go order yourself some meter by meter plate.
[21:24:01] <LeelooMinai> zeeshan|2: Well, that's not a good reason - that's just unfortunate state of things:)
[21:24:12] <zeeshan|2> yea it's too far gone to convert over now
[21:24:20] <zeeshan|2> i always do my calculations in imperial
[21:24:26] <zeeshan|2> its the same
[21:24:43] <ssi> you know what will be super productive?
[21:24:45] <ssi> whining about units
[21:24:47] <LeelooMinai> I end up using both
[21:24:48] <zeeshan|2> :D
[21:25:01] <zeeshan|2> ssi i ask the students how big 0.04 mm is +/-
[21:25:05] <zeeshan|2> they have no clue
[21:25:09] * SpeedEvil sighs.
[21:25:14] <SpeedEvil> .001"
[21:25:17] <zeeshan|2> but if i ask how big 0.001" +/-
[21:25:19] <zeeshan|2> they have a clue :P
[21:25:47] <LeelooMinai> The reverse would happen in other small parts of the world - like Europe or Asia:)
[21:25:53] * SpeedEvil wonders how many people use 186/300 to compare km and miles
[21:25:56] <zeeshan|2> yep
[21:26:00] <zeeshan|2> but we live in north america
[21:26:07] <zeeshan|2> not europe or asia :)
[21:26:18] <LeelooMinai> Yes, but I order most stuff from China and they are not imperial
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[21:26:38] <DaViruz> i use 6/10 to compare miles and km, because i remember the 60/100 radio from speedometers :P
[21:26:43] <pfred1> I try to stay away from Chinese goods myself
[21:27:11] <LeelooMinai> If I was rich maybe I would stay away too - but that's not realistic for a poor hobbyist
[21:27:28] <pfred1> I was working with a Chinese motor here and the rotor induces a current into the motor's housing that would light up a light bulb to ground
[21:27:43] <zeeshan|2> rofl
[21:27:48] <LeelooMinai> Maybe that's a feature:)
[21:27:52] <pfred1> I thought it was pretty funny too
[21:27:56] <zeeshan|2> nice
[21:27:58] <ssi> pfred1: chinese electrics are OFTEN unsafe as hell wrt groundis
[21:28:23] <pfred1> needless to say once I saw that I quickly retired that motor some fomething made in illinois
[21:28:57] <LeelooMinai> You just have to do more research - you can still buy things that will work well.
[21:29:22] <LeelooMinai> Sometimes open stuff and see inside if it looks sane.
[21:29:24] <pfred1> made in USA or stay away
[21:29:50] <zeeshan|2> heY!
[21:29:58] <zeeshan|2> made in canada made in germany made in europe
[21:29:59] <zeeshan|2> ftw
[21:30:00] <pfred1> I had the motor all opened up it looked fine
[21:30:03] <ssi> zeeshan|2: canada is part of usa ;)
[21:30:07] <zeeshan|2> lol
[21:30:13] <pfred1> there was no short to the housing
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[21:30:25] <zeeshan|2> bbl
[21:30:32] <zeeshan|2> i wonder when i get back if LeelooMinai will have a table
[21:30:51] <LeelooMinai> Don't worry - eventually I will
[21:30:59] <zeeshan|2> if not i might have to send her the piece of aluminum
[21:31:02] <zeeshan|2> so i dont go crazy
[21:31:09] <zeeshan|2> bbl :D
[21:31:11] <LeelooMinai> I can always just buy 30kg of concrete for $10:)
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[21:31:53] <pfred1> my personal best is pouring 540 cubic yards of concrete in a day
[21:32:01] <LeelooMinai> Just that my confidence level would not be too high with that
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[21:32:28] <pfred1> we were burning better than $30,000 a minute on that job
[21:33:17] <LeelooMinai> I thought concrete is cheap
[21:33:24] <pfred1> well labor ain't
[21:33:39] <pfred1> and 540 cuyd of concrete ain't too cheap either
[21:33:42] <LeelooMinai> $30 per minute? :)
[21:33:49] <pfred1> no $30,000
[21:33:50] <LeelooMinai> That's some highe payed workers
[21:33:57] <ssi> concrete is NOT cheap
[21:34:10] <ssi> I've been looking into building a hangar, and the concrete costs as much as the building
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[21:34:53] <LeelooMinai> Well, cheap in comparison I guess to other materials, like steel, aluminum, etc.
[21:35:15] <pfred1> trouble with concrete is it doesn't wait
[21:35:27] <LeelooMinai> And cracks? :)
[21:35:32] <ssi> lawd
[21:35:36] <ssi> 25,000 60# bags of concrete
[21:35:42] <ssi> for the slab I want
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[21:35:50] <pfred1> oh we used trucks
[21:36:03] <ssi> well yeah
[21:36:08] <LeelooMinai> ssi: What are you building an olimpic pool? :)(
[21:36:09] <ssi> that's a million and a half pounds of concrete
[21:36:12] <ssi> how does that even happen
[21:36:30] <DaViruz> what thickness?
[21:36:31] <pfred1> for us it happened in a warehouse floor
[21:36:34] <ssi> 6"
[21:36:39] <ssi> 140x160'
[21:36:42] <pfred1> 12" thick
[21:37:02] <DaViruz> that number seems unreasonably large
[21:38:03] <DaViruz> that would be like what, 30 truckloads?
[21:38:24] <pfred1> a truck can carry 10 cuyd but they usually only haul 9
[21:38:39] <ssi> it's 414 yd
[21:38:49] <ssi> so 40-50 truckloads :/
[21:38:51] <pfred1> that's a huge pour
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[21:38:52] <PetefromTn_> Damn that was some good Turkey!! and stuffing, and potatoes, and candied Yams, and hot fresh rolls, and...and....and....
[21:39:00] <_methods> amen
[21:39:07] <_methods> did my turkey i the egg
[21:39:09] <PetefromTn_> I am gonna sit here and rub my belly for about an hour
[21:39:11] <_methods> it was a hit
[21:39:20] <PetefromTn_> nice
[21:39:28] <PetefromTn_> Gotta percolate for awhile
[21:39:29] <_methods> https://www.dropbox.com/s/flll1pk6txtsacs/2014-11-27%2010.50.42.jpg?dl=0
[21:39:53] <_methods> brined for 48 hours then injected with hot sauce and butter
[21:39:54] <PetefromTn_> so I can make room for the NY style homemade cheesecake and Pumpkin pie!! Oh and the fresh Italian cookies!!
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[21:40:13] <PetefromTn_> Woohoo the green egg strikes again!!
[21:40:18] <_methods> yes yes
[21:40:25] <PetefromTn_> yes yes yes
[21:40:49] <DaViruz> well i guess 160' is quite a bit
[21:41:15] <PetefromTn_> I swear my wife makes some amazing cheesecake. I TRY to not eat the whole damn thing but who am I kiddin'
[21:41:23] <PetefromTn_> ;)
[21:42:02] <ssi> we're doing dinner in the egg too
[21:42:05] <ssi> but ours is ribs
[21:42:07] <ssi> mmmm ribs
[21:42:30] <LeelooMinai> Or she added some hallucinogenic substances to them
[21:44:23] <PetefromTn_> whoo maybe but it works... I might take seconds!!
[21:45:10] <_methods> ssi you got egg too?
[21:45:15] <ssi> my roommate does
[21:45:18] <_methods> sweet
[21:45:34] <_methods> i did ribs i it a couple weeks ago
[21:45:49] <_methods> i need to make one of those rib racks for it
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[21:47:13] <ssi> yea he has one
[21:47:31] <LeelooMinai> Hmm, maybe for those flatness measurements I should invest in "straight edge" that is really straight
[21:49:21] <PetefromTn_> that would cost more than the plate LOL
[21:49:34] <LeelooMinai> Really?
[21:49:52] <LeelooMinai> Isn't it just a piece of metal ground flat?
[21:49:54] <PetefromTn_> well I guess that depends on your definition of flat
[21:50:15] <LeelooMinai> Not crazy-flat - close to B grade surface plate I guess
[21:50:18] <ssi> you can get a 24" aluminum straightedge for $50 or so
[21:50:40] <ssi> $31 actually
[21:50:48] <ssi> but those possibly aren't flat enough for your purposes
[21:50:53] <ssi> 0.003"
[21:51:15] <ssi> their steel ones are 0.001", and $51 for 24"
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[21:52:25] <LeelooMinai> Maybe I should concentrate on woodworking - would be much cheaper
[21:52:36] <ssi> starretts are 0.0002"/foot, 24" is about $85
[21:52:36] <pfred1> that's what I'm doing
[21:53:24] <pfred1> I'm hoping the third time I put my machine together over here is going to be the charm
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[22:04:19] <Deejay> gn8
[22:04:49] -!- Deejay has quit [Quit: bye]
[22:05:52] <pfred1> http://www.realitytvworld.com/news/creed-singer-scott-stapp-blames-obama-for-financial-woes--50134642.php
[22:05:58] <pfred1> Thanks Obama!
[22:07:12] <cathode> woot.
https://www.dropbox.com/s/olpkt0z9spxucx1/2014-11-27%2013.59.56.jpg?dl=0
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[22:08:00] <PetefromTn_> Awesome!!.....er.....whattahell is it?
[22:08:16] <pfred1> w3hoops wrong channel
[22:08:21] <pfred1> heh
[22:08:29] reventlov is now known as Reventlov
[22:08:37] <cathode> it lifts the upper bandsaw wheel to apply tension to the blade
[22:08:51] <cathode> with two pneumatic cylinders, instead of a steel spring
[22:09:19] <cathode> the springs can't apply much force and they get mushy after a while because of vibration + fatigue and stuff.
[22:09:48] <PetefromTn_> hm every bandsaw I ever saw used a threaded screw to tension the wheels...
[22:09:57] <cathode> yes, a threaded screw with a spring
[22:10:13] <pfred1> that's how mine works
[22:10:14] <cathode> if you don't have something to absorb shocks, you can snap a blade if a chip gets caught between the wheel and the blade
[22:10:50] <PetefromTn_> sure
[22:11:06] <cathode> larger industrial bandsaws (like 36"+) use either pneumatics or hydraulics
[22:11:26] <cathode> anyway, i built this one from scratch, entirely of my own design. so it uses air cylinders :P
[22:12:06] <cathode> i tapped threads directly into the wood to install that whole thing and then used some acetone-thinned epoxy to strengthen the wood fibers around the threads. seems to work great
[22:12:43] <cathode> i did a test with a 1/2-13 bolt and tightened it with an impact driver and it crushed the wood fibers around the head of the bolt but none of the threads gave way
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[23:00:12] <taiden> hey all
[23:00:24] <taiden> got the new machine running. 900 ipm rapids
[23:00:26] <taiden> :)
[23:00:45] <Tom_itx> that'll wake ya up
[23:00:55] <taiden> problem is when I feed linuxcnc a toolpath it likes to run at about 50 ipm
[23:01:22] <taiden> i think it's an issue of the toolpath being made up of a ton of short lines and lookahead wont allow it to pick up speed
[23:01:37] <Tom_itx> what ver lcnc?
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[23:01:44] <Tom_itx> 2.7 is supposed to fix that
[23:01:46] <taiden> 2.6.4
[23:01:56] <Tom_itx> the new TP is in 2.7 i believe
[23:02:21] <Tom_itx> may not yet be released for realtime though
[23:02:27] <taiden> what's TP?
[23:02:34] <Tom_itx> trajectory planner
[23:02:38] <taiden> oh I see
[23:02:59] <taiden> so what are my options?
[23:03:05] <Tom_itx> also from what i gather if you have more than X Y Z it falls back to the old one
[23:03:18] <Tom_itx> go slow or wait?
[23:03:28] <Tom_itx> or compile it and give it a try
[23:03:57] <taiden> well, I spent a decent amount of money on getting a machine that would actually run 900 ipm well
[23:04:08] <taiden> so going slow and waiting aren't really options
[23:04:22] <taiden> do you guys know if mach3's trajectory planning is better?
[23:04:27] <Tom_itx> ask the developers how it's coming along
[23:04:27] <taiden> i've never actually used it
[23:04:38] <Tom_itx> i seriously doubt it
[23:06:32] <PetefromTn_> sounds like your toolpath maybe needs work... sometimes the way things are drawn or the way your post processor is setup it will do that from what I gather
[23:06:35] <Tom_itx> read today's log in the developer channel
[23:06:44] <Tom_itx> they were talking about it
[23:07:11] <Tom_itx> a good planner should eat code for lunch
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[23:07:36] <Tom_itx> from what i hear the new one is a big improvement
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[23:11:40] <Tom_itx> http://buildbot.linuxcnc.org/
[23:11:46] <Tom_itx> if you wanna try it
[23:11:49] <Tom_itx> i think that's the link
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[23:13:56] <taiden> are there guidelines for creating toolpaths that work well with linuxcnc's trajectory planner?
[23:14:08] <Tom_itx> and yes you could lessen the precision on your toolpath and improve the line segment count
[23:14:35] <Tom_itx> that goes for just about any control
[23:14:55] <taiden> reduce line segment count
[23:15:01] <Tom_itx> yes
[23:15:09] <taiden> that should be the main goal im guessing
[23:15:18] <taiden> does linuxcnc 2.6 tp only read out a certain number of lines?
[23:15:20] <taiden> is that the issue?
[23:15:35] <Tom_itx> i'm not sure but i believe the lookahead has been the issue with it
[23:16:12] <PetefromTn_> honestly if your machine is capable of 900 IPM and you are only getting 50 I would say you have issues other than the capabilites of linuxCNC's trajectory planner.
[23:17:05] <Tom_itx> probably so
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[23:19:04] <taiden> with a simple g1 f900 it's no problem
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[23:19:13] <taiden> this happens when i use mastercam generated toolpath for surface contouring
[23:19:17] <Tom_itx> it's only eating one line of code though
[23:19:22] <Tom_itx> not 2000
[23:19:26] <taiden> this is why i think it's TP
[23:19:34] <Tom_itx> break that same move into 2000 and see what happens
[23:19:44] <taiden> yeah
[23:19:45] <PetefromTn_> your accell rates are also a factor for the axes
[23:19:53] <taiden> i'm doing 45 in/s/s
[23:19:55] <Tom_itx> are you using mesa hardware?
[23:20:00] <taiden> software stepping
[23:20:11] <Tom_itx> well that's a major part of it
[23:20:19] <taiden> i dont see why
[23:20:41] <Tom_itx> because the pc has to do more work?
[23:20:53] <Tom_itx> work takes time
[23:21:02] <Tom_itx> let other hardware help with the workload
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[23:21:41] <taiden> i assumed that generating stepper signals wasn't resource intensive
[23:21:43] <Tom_itx> i have a crappy little mill but when i switched over to better drivers and mesa cards my feeds improved from 20 to 80
[23:22:01] <taiden> and that had nothing to do with step frequency?
[23:22:01] <Tom_itx> talk to pete about it
[23:22:17] <taiden> my software step frequency allows 900 ipm movement
[23:22:23] <Tom_itx> he's probably got a turkey hangover though
[23:22:29] <taiden> i know I do!
[23:23:20] <Tom_itx> i can't give specifics because i didn't write the software or build the hardware but i think i'm on the right track
[23:24:40] <Tom_itx> what sort of machine is it?
[23:25:38] <PetefromTn_> I know exactly jack squat about stepper motors but I agree with Tom that Mesa cards handling things allows you much higher performance especially the PCI cards apparently. I like the 5i25/7i77 setup on my Cincinatti and my new CNC lathe will be getting them at some point here soon as well.
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[23:27:18] <Tom_itx> well i think his newer boards offer better performance simply due to the higher frequencies the fpga runs at
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[23:31:29] <taiden> i had assumed that faster linear motion was a result of higher step frequency provided by the mesa cards
[23:31:46] <taiden> not any increase in available processing resources to improve lookahead
[23:32:07] <Tom_itx> both?
[23:32:11] <taiden> in any case, my tolerances in post were 0.0001" across the board
[23:32:18] <taiden> just changed it to 0.001" and will test
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[23:32:29] <jdh> what screw pitch/etc?
[23:32:31] <Tom_itx> or even .0005
[23:32:45] <taiden> 20mm true lead X & Y, 10mm true lead Z
[23:32:52] <taiden> step frequency around 40khz
[23:32:56] <Tom_itx> must be pretty high if he's getting 900ipm
[23:33:26] <Tom_itx> taiden, compare your code size
[23:33:37] <taiden> great idea!
[23:34:10] <Tom_itx> i know when we were cutting surfaces we'd go thru thousands of lines a min
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[23:36:23] <Connor> maybe it was 900 mm per min
[23:36:44] <Tom_itx> maybe, that's not what i read
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[23:37:16] <Tom_itx> i know i'd be happy with a machine that did 900 ipm rapids
[23:37:18] <jdh> seems awfully high for a stepper and any kind of normal screw
[23:37:24] <Tom_itx> agreed
[23:37:34] <Connor> I've seen very few systems with steppers be able to pull off 900ipm
[23:37:35] <Tom_itx> that's why i suggested a high pitch screw
[23:37:42] <jdh> low pitch screw
[23:37:47] <Tom_itx> that
[23:38:12] <Tom_itx> and if it's not a mill there's little load on the table
[23:38:13] <Connor> I have a 10mm pitch on my router.. I can only do around 200IPM
[23:38:13] <jdh> low pitch screw on a 1.8degree stepper is low ers
[23:38:49] <Tom_itx> mine is 20 tpi screw
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[23:39:02] <jdh> connor: limited by step speed? or just physical?
[23:39:04] <Tom_itx> i don't expect too much from it
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[23:39:15] <Connor> limited by stepper voltage.
[23:39:19] <Connor> only 24v
[23:39:26] <Tom_itx> double it
[23:39:37] <taiden> 167kb to 164 kb lol
[23:39:39] <Tom_itx> makes life better
[23:39:41] <Connor> Using cheap 4 axis ebay stpper driver..
[23:39:57] <taiden> what does "low ers" mean
[23:39:58] <Connor> only good for up to 30v I think.
[23:40:01] <jdh> res
[23:40:04] <Tom_itx> oh
[23:40:20] <Tom_itx> maybe 24v is best for them then
[23:40:26] <Connor> low resolution
[23:40:28] <jdh> 1 rev = 20mm?
[23:40:31] <pfred1> I went from 24V to about 28V with my TB6560s and it made a difference
[23:40:47] <jdh> pfred1: did it change the whine?
[23:40:57] <Tom_itx> i went from 24 to 48 and noticed big improvements
[23:41:04] <pfred1> not that i noticed
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[23:41:15] <Connor> g540 + 48v would be best..those steppers have high inductance too.. really a bad choice.. was first ones I ever purchased.. didn't no jack about steppers and stuff
[23:41:18] <pfred1> the whine usually means inductance in the sense current path
[23:41:40] <jdh> don't g540's go up to 60v?
[23:41:42] <Tom_itx> i'm not pushing my steppers as hard as i could be either
[23:41:53] <Connor> I changed out the caps on my TB6560's to reduce the high pitch whine..
[23:41:54] <pfred1> Tom_itx feed 48V into a TB6560 and you have an explosive device
[23:41:56] <Tom_itx> 2.5 A iirc and will take 4 i think
[23:42:04] <Tom_itx> heh
[23:42:19] <Tom_itx> i got the good geckos though
[23:42:21] <pfred1> there is an upgrade IC to it though
[23:42:34] <Tom_itx> 80v iirc
[23:42:42] <Connor> Happy Thanksgiving those of you who celebrate it.. those who don't, you don't know what your missing. :)
[23:42:52] <jdh> gluttony? :)
[23:42:54] <Tom_itx> or probably don't care
[23:42:55] <taiden> yeah i'm still having huge issues with lookahead
[23:42:55] <pfred1> Tom_itx my drives cost me $10 a piece
[23:43:06] <Tom_itx> i'm not knocking your drives...
[23:43:09] <Tom_itx> just saying
[23:43:10] <pfred1> you're not getting Geckos for that
[23:43:13] <Tom_itx> nope
[23:43:16] <taiden> wont break 100 ipm on a 6" long segment that doesn't deviate more than 0.010" from being a straight line
[23:43:32] <taiden> will break 600 ipm on a 6" long G1 movement
[23:43:46] <Tom_itx> so it's better?
[23:43:53] <taiden> it's not better
[23:43:58] <taiden> it's about the same
[23:44:03] <pfred1> right now my electronics is about all that is working right on my machine
[23:44:33] <pfred1> well, it is just the X axis that is screwed up
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[23:44:41] <Tom_itx> seems 100 is better than 50
[23:44:48] <taiden> i misspoke earlier
[23:44:50] <Tom_itx> that's 2x improvement
[23:45:06] <taiden> that was with an earlier test
[23:45:21] <taiden> with the current test it was 100 ipm before changing tolerances and 100 ipm after :( sorry for the confusion
[23:45:38] <taiden> mastercam doesn't appear to have reduced the number of segments used either
[23:45:48] <Tom_itx> it should
[23:45:58] <Tom_itx> deviation from true path
[23:46:03] <Tom_itx> that's what you're looking for
[23:46:29] <taiden> hm
[23:46:40] <taiden> mastercam post is set for 0.01gs of cornering acceleration
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[23:46:56] <taiden> i can never tell what stuff is actually controlled in post or by linuxcnc
[23:47:11] <Tom_itx> i've seen lots of others but no mastercam post
[23:47:27] <Tom_itx> that's why you compare the code output
[23:48:32] <taiden> compare to what?
[23:48:50] <Tom_itx> previous output
[23:49:28] <pfred1> try setting the cornering acceleration higher
[23:50:23] <Tom_itx> if the code gets smaller you know the segments are longer and less accurate
[23:50:30] <Tom_itx> but maybe within part tolerance
[23:52:09] <Tom_itx> you're not gonna get fabulous performance from software stepgen
[23:53:12] <taiden> i'm not willing to accept that it's because of software stepping
[23:53:23] <pfred1> me either latency is latency
[23:53:23] <taiden> maybe i'm being naive
[23:53:35] <pfred1> it doesn't change appreciably with load
[23:54:02] <taiden> sure the rapids will be faster because a mesa card will produce much higher pulse frequencies
[23:54:26] <taiden> but in my opinion that has nothing to do with the fact that this thing is running 1/9 the velocity it is designed to run
[23:54:33] <taiden> in a situation that makes it seem like it's a lookahead issue
[23:54:41] <pfred1> like you said it can do the speed
[23:55:51] <taiden> http://pastebin.com/FK7pUJuL
[23:55:58] <taiden> here is the toolpath in question
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[23:58:19] <taiden> i mean, i could just bump the acceleration up really high but
[23:58:24] <taiden> i'd rather not if i can avoid it
