#emc | Logs for 2009-12-07

[00:01:43] <dan1mal_garage> andy, sounds fun
[00:02:55] <dan1mal_garage> i feel your pain, my only moving tools are some steel pipes, and some heavy duty ratchet tie downs
[00:04:26] <andypugh> A chain block is better than tie-downs, I feel sure. Even if the chains keep getting jammed as they really are not designed to work horizontally.
[00:05:12] <dan1mal_garage> oh i'm sure it is, but i'm cheap
[00:05:19] <dan1mal_garage> so i use what i have
[00:05:30] <dan1mal_garage> hence why i use emc
[00:05:47] <andypugh> So are we, these are the ones my dad has had all my life, so 40+ years old.
[00:06:20] <andypugh> (And I doubt he bought them new)
[00:06:26] <dan1mal_garage> old ones are better anyways
[00:08:12] <andypugh> I suspect the ones on the traveller on the workshop hoist are even older. Worm-drive with a friction lock. (operated by a fast screw)
[00:08:56] <dan1mal_garage> i just use old fashioned brute force
[00:09:46] <dan1mal_garage> i'm excited, i got my lathe's controller gutted and removed from the shop
[00:09:58] <dan1mal_garage> now i'm committed to the emc retrofit
[00:10:38] <dan1mal_garage> i just gotta order a few things from Mesa on Monday, then i'm set to build
[00:10:56] <andypugh> We could have moved the Smart and Brown that way, but the Colchester Triumph would be hard. The Kearns S-type borer would be impossible. We couldn't even move the saddle/table of that by main strength when we last had it removed (and we were both 20 years younger)
[00:11:55] <dan1mal_garage> yea some stuff is just too heavy
[00:13:07] <dan1mal_garage> 20 years ago i was 8, so i'd hope i'm stronger now :)
[00:13:57] <andypugh> You are probably the strongest you will ever be. Want to help move a boring machine?
[00:14:21] <dan1mal_garage> sure, wanna help move my shizuoka? haha
[00:14:53] <andypugh> I will happily move it into my dad's garage. Swap for an Ormerod Shaper?
[00:15:01] <dan1mal_garage> it's probably down to 5000lbs now that the bandit controller os gone
[00:15:09] <dan1mal_garage> is*
[00:15:16] <dan1mal_garage> ha
[00:15:26] <dan1mal_garage> i was thinking about a shaper the other day
[00:15:54] <andypugh> (Actually, seriously, I wonder how we can persuade someone to take the big old Shaper off of our hands?)
[00:15:57] <dan1mal_garage> i was thinking how cool it would be to have a cnc'd shaper
[00:16:11] <dan1mal_garage> running off cnc
[00:16:14] <dan1mal_garage> emc*
[00:16:17] <andypugh> Me and my dad were discussing it this afternoon.
[00:16:30] <dan1mal_garage> arent you across the pond?
[00:16:39] <andypugh> You could use quite small steppers, as they only move off-load
[00:16:50] <dan1mal_garage> yea thats what i figured
[00:17:17] <dan1mal_garage> with a little rotary table
[00:17:27] <dan1mal_garage> would be great for gears or splines
[00:17:41] <dan1mal_garage> post it up on practical machinist
[00:17:48] <dan1mal_garage> someone would buy it, i'm sure
[00:17:56] <dan1mal_garage> lotsa shaper nuts on there
[00:18:25] <andypugh> My dad has seem folk cut big pinions with a shaper. 800mm diameter gears with 2" teeth by drawing the profile on the end and cutting by eye (finish with an angle grinder and marking dye)
[00:18:44] <dan1mal_garage> wow
[00:18:49] <dan1mal_garage> neat
[00:18:50] <andypugh> But as you say, we are the wrong side of the pond.
[00:19:07] <dan1mal_garage> practical machinist
[00:19:14] <andypugh> But that sounds like a better bet than eBay
[00:19:20] <dan1mal_garage> yea
[00:19:26] <dan1mal_garage> the classifieds section
[00:19:51] <dan1mal_garage> might not get a ton for it, but at least it will go to an enthuseist
[00:20:05] <dan1mal_garage> keep the old iron alive
[00:20:17] <andypugh> It's in good condition, we did a slide re-con about 20 years ago, and I doubt it has run 8 hours since.
[00:20:42] <dan1mal_garage> http://img.photobucket.com/albums/v20/danielwilcox/DSCN0015.jpg
[00:20:56] <dan1mal_garage> my only legitimately old iron
[00:21:03] <andypugh> My dad was trained as an engineering fitter, we used the scrapers he made as an apprentice.
[00:21:42] <dan1mal_garage> cool... i've never used one
[00:21:46] <dan1mal_garage> wanted to though
[00:22:03] <dan1mal_garage> wire edm is a bit more popular out here
[00:22:31] <andypugh> That's very, very, similar to the Colchester we moved today. Except that has been converted to Vee-belt and has about 50% of the orignal paint, and no non-original
[00:23:17] <dan1mal_garage> i restored mine, but it was covered in years of oil, grease, and several coats od lead paint
[00:23:58] <dan1mal_garage> they used a mixture of pine tar and iron filings to fill the casting before paint
[00:24:03] <dan1mal_garage> that was fun to get off
[00:24:09] <andypugh> Yours looks like a better machine in some ways. I think I see a Norton box?
[00:24:42] <dan1mal_garage> norton box?
[00:25:05] <dan1mal_garage> not familiar with that
[00:25:06] <andypugh> Ours has changewheels only (and we don't have them) and the cross slide is 6 tpi with a 1.5" diameter thimble.
[00:25:39] <andypugh> sorry, it might be a term less generic than I thought for a gearbox on the leadscrew
[00:26:23] <dan1mal_garage> ohh yea, it's got a fairly decent gearbox for threading/feed
[00:26:53] <dan1mal_garage> spindle has back gears too
[00:27:05] <dan1mal_garage> great for big stuff, even with the little motor
[00:27:13] <dan1mal_garage> takes a bit to stall it
[00:29:14] <dan1mal_garage> you must have a neat shop with all those old machines
[00:30:57] <andypugh> We just have a big reduction and a huge chuck. The gap-piece is missing and it spends most of its time with a spare 3-jaw held in the 4-jaw. We took the chuck off between us, and moved it in a wheelbarrow. No idea where my dad got it from, but I bet he paid < £5 for it. I guess it is an 18" ones
[00:31:59] <dan1mal_garage> thats a big chuck
[00:32:26] <andypugh> My workshop is just a nasty CNC converted 7" chinese lathe/mill combo.
[00:32:46] <andypugh> Let me find links to tools like my dad's collection.
[00:33:26] <dan1mal_garage> let me find a beer :)
[00:33:43] <andypugh> http://www.scottmachinery.co.nz/dbimage.php?meth=norm&img=BORE-1-0003__1
[00:34:47] <dan1mal_garage> cool
[00:34:50] <andypugh> http://www.lathes.co.uk/colchester/img41.gif
[00:35:13] <andypugh> The Kearns is a lovely machine. Pretty much universal
[00:35:41] <dan1mal_garage> yea looks like it
[00:37:04] <andypugh> http://www.lathes.co.uk/smartbrown/page6.html
[00:38:03] <andypugh> http://www.lathes.co.uk/shapers/img1.gif
[00:38:06] <dan1mal_garage> i like that one
[00:39:09] <dan1mal_garage> man my new compressor is so quiet compared to my old one
[00:39:59] <dan1mal_garage> i put some heavy duty rubber pads on it and it's quieter than my car now
[00:41:19] <andypugh> We have a grinder a bit like http://www.zhongyang-engrg.com/photos/rq1907-2.jpg except it has a very different grinding head to is does surface and internal grinding too.
[00:41:54] <dan1mal_garage> cool i wish i had an id/od grinder
[00:42:01] <dan1mal_garage> all i have is a surface grinder
[00:42:28] <andypugh> And then there is the rather unwanted Ormerod Shaper that came free with the Smart and Brown lathe, free to a good home.
[00:44:20] <andypugh> quite a lot like this one, but the version intended for line-shafting.
[00:44:21] <andypugh> http://www.zhongyang-engrg.com/photos/se8089.jpg
[00:45:39] <dan1mal_garage> that's a beast
[00:50:16] <dan1mal_garage> what do you do with your machines, just hobby stuff?
[00:53:17] <dan1mal_garage> so i guess i gotta figure out how to hook up my servo amps
[00:53:50] <Valen> paperclips
[00:54:05] <dan1mal_garage> well i was going to use tin foil
[00:54:11] <Valen> yuppy
[00:54:11] <dan1mal_garage> but paper clips would work
[00:54:28] <Valen> more amps anyway
[00:55:35] <dan1mal_garage> so my machine has resolvers instead of encoders, but i bought the pico resolver to encoder converters
[00:55:48] <Valen> good start
[00:56:17] <Valen> what motors and drivers have you settled on?
[00:56:20] <dan1mal_garage> so do the resolvers go to the servo amp, and also to the pico board, and then to my mesa 7i33?
[00:56:38] <Valen> depends how your running things
[00:56:45] <andypugh> Back to the question of what my dad does with his machines, I am not entirely sure. He mainly uses them to make parts for each other.
[00:56:48] <Valen> what your servo amp does
[00:57:05] <dan1mal_garage> i'm guessing velocity mode
[00:57:21] <Valen> yeah I guess that sounds about right, but it seems odd
[00:57:28] <dan1mal_garage> haha andy, that sounds about right for old iron collectors
[00:57:55] <andypugh> Though I have made a lot of parts for a veteran fire-engine with his machine shop.
[00:57:57] <Valen> mesa stuff seems to prefer having the encoder stuff come to it and then just put out a PWM
[00:58:04] <dan1mal_garage> what seems odd? i'm completely new to servos, i only have experience with steppers
[00:58:13] <Valen> so the amp just amplifies, doesen't do any servo stuff of its own
[00:58:38] <dan1mal_garage> hmm well whats the difference between a servo drive and a servo amp?
[00:58:50] <andypugh> I would expect the servo amp to just take the hall sensors, if fitted
[00:59:10] <andypugh> Brushless servos?
[00:59:15] <Valen> well like i said I use the whole mesa chaing
[00:59:17] <Valen> chain
[00:59:54] <dan1mal_garage> brushed i believe
[00:59:55] <Valen> so mine is encoder > drive board that just passes the encoder back to the host, then PWM comes out of the host, through the drive and to the motors
[01:00:25] <Valen> so in my setup it would be like running the amp without any encoder inputs
[01:00:38] <Valen> it just takes the signals in and amplifies them
[01:00:48] <andypugh> For bushed servos the amp probably doesn't even need to see the resovers
[01:01:26] <andypugh> Whether it will work without that input is a different matter, but it doesn't need it.
[01:01:44] <Valen> really does depend on the amp
[01:03:50] <andypugh> Sorry, I was pehaps not being entirely clear. All we want the amp to do in EMC is feed the current we ask to the motors. Whether the amp can be persuaded to perform such a lowly task is a different matter.
[01:05:07] <andypugh> (And I think I might have messed up, I bought 3 brushless drives from the US, but now I read the spec they say "adjustable 0.8 - 5 second ramp time"which sounds useless.
[01:05:15] <Valen> current or voltage or anything
[01:05:32] <bglackin> Greetings all - Wondering if someone can gently guide me to seeing the raw code that comprises truetype-tracer? I would like to see if I can add functionality which would add an oword routine allowing varying depths of cut IE - Cut outs versus engraving
[01:05:56] <Valen> .8 seconds for full range might be enough
[01:06:02] <Valen> possibly
[01:06:06] <Valen> if you limit the accell
[01:06:51] <andypugh> I can see me looking for the adjusting pot and shorting out adjacent caps
[01:08:24] <andypugh> the truetype tracer code is here: http://www.timeguy.com/cradek/truetype
[01:08:44] <andypugh> But I assume yiou have already seen that, and that I am misunderstanding the question?
[01:09:01] <dan1mal_garage> i guess cradek said the amps need the tach feedbach at least in order to work
[01:10:00] <andypugh> I can see that they would uses that as feedback for <handwaving guesses go here>
[01:12:43] <dan1mal_garage> it has a velocity command and actual velocity connections on the amps
[01:13:15] <SWPadnos> ... as feedback for actually controlling velocity
[01:17:18] <Valen> yeah your amps are doing parts of the servo job
[01:17:53] <dan1mal_garage> it also has inhov, and v+/v- connections
[01:18:29] <dan1mal_garage> inh and ov*, not inhov
[01:18:41] <andypugh> Given the choice, which control mode is to be preferred in a servo system for CNC? It seems to me that anything other than a raw-current mode is just cascading PID controllers, and likely to hinder rather than help. But then, I don't know very much.
[01:19:49] <dan1mal_garage> i dunno, i know absolutely nothing about servos
[01:19:50] <SWPadnos> andypugh, it's very likely that you will have three loops in any system: position, velocity, and torque/current
[01:19:57] <SWPadnos> it's just where they are that differs
[01:20:07] <dan1mal_garage> other than the very, very basics
[01:20:17] <SWPadnos> a velocity-mode amp has both a torque/current loop and a velocity loo pin it
[01:20:22] <SWPadnos> loop in
[01:20:40] <SWPadnos> the position loop is better off in EMC, but it could also be in the drive, like a gecko
[01:20:50] <eric_unterhausen> I was trying to set up my amps the other day, the torque mode had some parameter I didn't want to have to come up with
[01:21:03] <bglackin> Andy - I have seen the tar file there - I am trying to figure out how to see the components and begin understanding the code. BIt of a noob getting code open
[01:21:18] <Valen> open the tar file?
[01:21:27] <Valen> as in decompress?
[01:21:39] <MarkusBec> MarkusBec is now known as MarkusBec_away
[01:21:48] <bglackin> I can extract and use the file - I want to look at the raw code itself - that part I do not know what to do
[01:22:03] <andypugh> bglackin: Well, I see cradek on the list on the left, he is the man you need to talk to :-)
[01:23:03] <andypugh> SWPadnos: If the loops are all inside emc2, is there any communication between them?
[01:23:06] <eric_unterhausen> how much more raw than the source code?
[01:23:24] <SWPadnos> andypugh, yes - the command from one to the next
[01:23:30] <bglackin> Yep - did not want to bother him if it was some basic thing I was missing first - I am not a programmer but have some basic background using lisp
[01:23:34] <SWPadnos> other than that, there shouldn't be
[01:23:41] <andypugh> OK.
[01:24:06] <bglackin> Lisp just lets me work with text files directly - Not sure how to get to the underlying code of those routines
[01:24:50] <SWPadnos> note that inner PID loops should run 5-10 times faster (at least) that the next outer PID loop
[01:24:53] <bglackin> those routine = Turetype-tracer and others
[01:24:59] <andypugh> Should there be? Just speculating, but in some ways the velocity controller _is_ the D-term of the position controller, and so on down the line.
[01:25:22] <SWPadnos> so if you want a 1ms/1KHz position loop, you need a 5-10 kHz velocity loop, and a 25-100kHz torque/current loop
[01:25:49] <andypugh> Right, so at some point you really do want to move to hardware?
[01:25:57] <SWPadnos> they all get whatever feedback they need, but probably not from the next loop - from a feedback device
[01:26:01] <SWPadnos> yes, certailny
[01:26:38] <SWPadnos> I think you can eliminate one loop with EMC2 - you can run with torque only below the position loop
[01:26:41] <SWPadnos> but it's harder to tune
[01:26:44] <andypugh> I basically understand controllers, but not in all situations.
[01:27:43] <Valen> what about the mesa hardware? its PWM straight to the fets?
[01:27:59] <andypugh> (My entire job is, arguably, controllers, but only a small corner of a hugely complicated system of several hundred interlocking PIDs)
[01:29:57] <SWPadnos> Valen, yes - it's more or less voltage or current mode, and I believe there are nonlinearities around zero
[01:30:26] <SWPadnos> I haven't tuned one before
[01:30:29] <Valen> seems to work fairly well for me
[01:30:59] <Valen> I guess that it depends largley on the mechanical response of the system too
[01:31:11] <SWPadnos> I think that mode is psuedo-velocity - the velocity will be close to proportional to the applied voltage
[01:33:13] <Valen> I spose
[01:33:19] <Valen> not really a loop though
[01:33:29] <Valen> well its not activley controlled
[01:35:05] <SWPadnos> no, but the applied voltage will be roughly proportional to the motor speed
[01:35:09] <SWPadnos> at some point
[01:35:17] <Valen> yeah
[01:35:38] <Valen> well there needs to be some form of input > output coupling
[01:36:39] <andypugh> Everything goes open-loop at some point.
[01:38:53] <MarkusBec_away> MarkusBec_away is now known as MarkusBec
[01:39:25] <andypugh> (Or perhaps not. I suppose you could have laser feedback on actual part dimensions to spot broken/worn tools but then perhaps laser output to actual distance is open loop, as you are trusting a calibration)
[01:40:08] <Valen> holographic part verification for the win
[01:40:27] <dan1mal_garage> i prefer magic myself
[01:40:37] <andypugh> How are you checking your light wavelength?
[01:40:47] <dan1mal_garage> magic
[01:40:50] <Valen> you mean your sprockets arent machined to a fraction of a wavelength of light?
[01:41:39] <andypugh> Of course they are. I just don't know what fraction, or in general what of several millions of integers there are too.
[01:41:40] <dan1mal_garage> only the dimensions that arent important
[01:43:10] <andypugh> Or, I suppose, I could claim I am always exactly to a wavelength, but have no idea _which_ wavelength,
[01:43:51] <dan1mal_garage> wavelength of magic
[01:45:56] <andypugh> Am I missing something, or is eBay 270180158540 quite remarkably expensive for a used part?
[01:50:37] <Valen> the 8th wavlength?
[01:51:01] <Valen> I want to make an interferomiter based linear scale
[01:51:10] <andypugh> Don't go mentioning octarine, it will end in trouble.
[01:51:11] <Valen> you could measure wavelength with a prism and a CCD
[01:51:27] <Valen> and a temperature measurement
[01:54:28] <andypugh> I am not sure how they do it, but you can buy kit that will measure distance to a few nm with a range of m. They combine time-of-flight with interferometry and squeeze another couple of decimal places out by rotating the polarisation. And they measure distance at 44kHz. But it isn't cheap
[01:56:10] <Valen> dunno what the polarisation is going to do
[01:56:21] <Valen> and they would have to measure time of flight to a wavelength
[01:56:24] <Valen> that would be hard
[01:56:30] <andypugh> http://www.polytec.com
[01:56:34] <Valen> and would probably have a big mimimum range too
[01:56:58] <andypugh> Depending on the kit you get they actually do 24Mhz
[01:59:24] <andypugh> Lovely kit, bit I have never worked anywhere that can afford it.
[02:02:38] <andypugh> it would be great fun to scan a milling cutter with this:
[02:02:40] <andypugh> http://www.polytec.com/usa/158_11685.asp?
[02:04:26] <MarkusBec> MarkusBec is now known as MarkusBec_away
[02:14:38] <andypugh> Polytec uses heterodyne interferometry to measure very small distances. The company quotes a resolution
[02:14:38] <andypugh> of 0.01 Ångstroms for its best systems, which are called vibrometers. For green laser light, this is
[02:14:39] <andypugh> equivalent to 1/500,000th of a wave.
[02:14:58] <andypugh> http://www.ferrodevices.com/Assets/Active_Downloads/Evaluate%20Polytec%20Sensors%20-%20Rev%20B.pdf
[02:15:45] <andypugh> Measuring to Angstroms rather impresses me.
[02:17:01] <dan1mal_garage> i have no clue what you're talking about lol
[02:18:09] <andypugh> Google says: 0.01 angstroms = 3.93700787 × 10-11 inches
[02:20:31] <dan1mal_garage> wowsers
[02:21:53] <andypugh> At that point you are watching atoms move.
[02:23:10] <andypugh> That's straight through nanotech into picotech
[02:23:45] <dan1mal_garage> i'm content with .00001"
[02:24:24] <andypugh> Yeah, I am generally perfectly happy with 0.1mm
[02:25:03] <andypugh> Or maybe 10mm with, for example, pizza
[02:25:39] <dan1mal_garage> ditto
[02:25:51] <dan1mal_garage> pizza and beet makes everything better
[02:25:55] <dan1mal_garage> beer*
[02:26:04] <dan1mal_garage> not beets, i hate beets
[02:26:08] <andypugh> Beet eh? Are you polish?
[02:26:16] <dan1mal_garage> a little
[02:27:07] <andypugh> Forgive me, I am giggling still at pizza and beet.
[02:27:32] <andypugh> I wonder how well beetroot would work on pizza?
[02:27:54] <SWPadnos> I bet pickled beets would be great on pizza
[02:27:58] <SWPadnos> but it would look terrible
[02:28:38] <andypugh> The web finds a lot of recipes.
[02:28:48] <tom3p> in stepgen, in velocity mode, should i be able to use a negative value on stepgen.0.velocity-command ?
[02:28:54] <dan1mal_garage> i've been on the pinapple and canadian bacon kick lately
[02:29:03] <andypugh> http://www.bareingredients.com/recipes/2002-10:beetpizza
[02:30:21] <SWPadnos> tom3p, I think that's what would cause it to output steps in the other diredtion
[02:30:25] <SWPadnos> direction
[02:30:46] <andypugh> tom3p: I have no idea. But is there a direction-command? If there is, then I would guess not.
[02:31:45] <tom3p> SWPadnos: i want to move in other direction i dont want halrun to blowup. i wondered if it was possible
[02:32:21] <SWPadnos> I'm pretty sure it works as you'd expect - it flips the direction bit and then starts outputting steps again
[02:32:21] <tom3p> andypugh: there is no input for direction with velocity mode unles it is sign of velocity which is in question now
[02:32:44] <tom3p> thx, will look thru my code then
[02:32:59] <tom3p> ( it blew up )
[02:33:30] <andypugh> What do you mean by "velocity mode"? I am reading the man page, and I have yet to spot it.
[02:33:51] <SWPadnos> stepgen mode="p,p,v,v" (= 2x position mode, 2x velocity mode)
[02:34:39] <tom3p> i used v,v,v
[02:34:39] <andypugh> I might be on the wrong page
[02:34:41] <SWPadnos> (or something like that)
[02:35:46] <andypugh> http://www.linuxcnc.org/docview/html//man/man9/stepgen.9.html is presumably a totally different sort of stepgen.
[02:36:13] <SWPadnos> oh sorry - ctrl_type=...
[02:36:22] <tom3p> yep
[02:36:28] <SWPadnos> read the second paragraph under "DESCRIPTION"
[02:36:45] <Jymmm> Yo
[02:38:19] <andypugh> Is it worth an experiment with sending the abs velocity to the velocity pin and the direction to the direction pin?
[02:38:45] <SWPadnos> no
[02:39:31] <andypugh> Answering my own question: NO, don't be stupid and annoying, that an output, yoi moron.
[02:40:00] <SWPadnos> heh
[02:40:19] <andypugh> Sorry folks, time to log off and sleep.
[02:40:39] <SWPadnos> and you would be well advised to leave the dir line under the control of stpgen, since it needs to take care of accel limits and the like
[02:41:50] <SWPadnos> tom3p, there's nothing special about negative velocity commands, they should work as expected
[02:42:14] <tom3p> ok, thx, its in my pyvcp/hal wiring
[02:42:28] <SWPadnos> yay!
[02:42:30] <SWPadnos> or something
[02:42:58] <tom3p> (changing dir just fights the stepgen, been there )
[02:44:06] <SWPadnos> remember that stepgen still has vel and acc limits
[02:44:13] <SWPadnos> which it still applies in vel mode
[02:44:30] <tom3p> yay! it works, now for montoring posn between 2 bounds
[02:47:07] <tom3p> polling in hal ...
[02:48:15] <SWPadnos> in Python?
[02:48:18] <SWPadnos> (ie, userspace)
[02:48:36] <tom3p> in hal file
[02:49:01] <SWPadnos> err - ok. carry on :)
[02:49:13] <tom3p> aye aye
[02:52:38] <SWPadnos> if you actually meant what you said, then you can't do that. halcmd has no looping, so you can't poll in a HAL file
[02:52:57] <SWPadnos> I, however, don't know what you meant :)
[02:58:43] <bglackin> cradek: Is there somewhere I can get a copy of truetype-tracer.py (assuming thats the script file name)? I see the executable but cannot see how to open it to view the code. I see similar files for Image-to-gcode.py on your website, but not for TTtracer and
[03:03:48] <tom3p> SWPadnos: am i always that hard to understand? i meant, i wanted to poll in hal. and you say i cant.... can i do 1 peek every hal cycle? ( thats kinda like polling at an unforgiving rate )
[03:04:16] <SWPadnos> in HAL you can (that's how all components read their pins and params)
[03:04:22] <SWPadnos> but not in a HAL file :)
[03:04:38] <tom3p> ah, and >I< am hard to understand
[03:04:43] <SWPadnos> hh
[03:05:04] <SWPadnos> uhm
[03:05:06] <SWPadnos> heh
[03:05:15] <tom3p> i thin you are saying i need to do it another way, any suggestions?
[03:05:37] <SWPadnos> no, I'm not saying that. you can poll in a HAL component just fine
[03:05:47] <tom3p> woof
[03:05:52] <SWPadnos> (a HAL file is a text file that gets executed by halcmd)
[03:10:01] <tom3p> i'll drop the poll idea, i just need to limit motion between where-i-began and where-i-was-going ( 2 limits )
[03:11:46] <SWPadnos> ah, so the oscillations should only be on one side of the "controlled point" when it's close to an endpoint
[03:12:57] <tom3p> regress is limited to the initial position, progress is limited by the programmed destination
[03:13:24] <tom3p> in between the position is dependant on the analog input ( caged tiger )
[03:14:14] <tom3p> (woman driver) ... lotsa metaphors coem to mind
[03:14:45] <SWPadnos> heh
[03:18:19] <tom3p> the cool part is: when it gets close to destination, it begins the oscillations in x&y as a 1:1 function of Z being past a special position. any retract past this special position will collapse XY to center while Z runs away towards initial position.
[03:18:42] <tom3p> its self expanding
[03:32:41] <tom3p> polling isnt need/wanted, hal is more like object programming. i make an event out of reaching a limit and act upon that.
[03:36:52] <Valen> SWPadnos so any ideas how to handle my Z axis issue?
[03:37:04] <SWPadnos> nope
[03:37:18] <Valen> but but your good
[03:39:10] <SWPadnos> only sometimes
[03:39:43] <SWPadnos> I'm not sure what you do with asymmetric response, except try to removethe asymmetry (ie, counterweight / spring balance)
[03:52:41] <Valen> will see If i can tune it in later
[03:52:51] <Valen> I'm thinking to recuce P and add in a buttload of I
[03:52:59] <Valen> anahoo back later
[03:56:07] <roh> hm.. i wonder if there is a nice way to 'time' how much time the machine is running, how much of it the steppers are moving and how long the cutter was in material (G0 vs G[123])
[03:56:22] <roh> like an advanced 'runtime-counter'
[03:58:56] <tom3p> Valen: machine manufacturers dont tune that problem. they add counterforces ( counterbalances or gas springs ). fwiw, thats how many engineers handle it
[03:59:51] <SWPadnos> roh, EMC2 has no way to know when the cutter is in material, unless there is some sort of feedback like spindle load to tell it
[04:00:21] <roh> SWPadnos ok... i think just differentiating G0 move runtime from G1 would be enough
[04:00:31] <SWPadnos> as for machine run time, that should be possible with classicladder or something - there should be a simple timer that can be enabled/disabled
[04:01:01] <SWPadnos> you could determine the move type by looking at whether the commanded velocity is > 95% of the max velocity (or similar)
[04:01:02] <roh> but is there a simple way to do that at all? i mean.. its simple to get time and so.. but is there something to persistantly store data?
[04:01:39] <SWPadnos> vars are persistent, but you'd have to run some G-code to read an analog value (a float with the time) into a var before shutting down
[04:02:23] <SWPadnos> you could also write a component like hal streamer, which simply keeps replacing the time value in a file
[04:02:38] <SWPadnos> or sampler - I don't remember which one saves data
[04:06:09] <roh> hm.. sampler samples it and puts it into a fifo which is read by halsampler and put to stdout which one can redirect into a file... not quite an easy way...
[04:06:43] <SWPadnos> not that - something like that
[04:06:54] <SWPadnos> since you only need the last piece of data, not a log of all of them
[04:07:36] <roh> hm... will think about it. i guess i need to write some simple hal component
[04:08:00] <roh> feed some hal pins in there to determine machine status, and output some data for display via pyvcp
[04:08:09] <SWPadnos> yep
[04:08:10] <roh> and read/write a file
[04:08:30] <roh> i wonder if it makes sense to output to rrd or so.
[04:08:32] <SWPadnos> the sampler/logger is only necessary if you don't want to have to do "something" at shutdown
[04:08:59] <roh> could be fun for the laser... logging laser-pwm state
[04:09:37] <roh> SWPadnos we simply want some way to see how long people are using the machines and if its only switched on or doing real work
[04:10:28] <SWPadnos> sure - the question I had was whether you want to have to manually do something at shutdown to record the elapsed time(s)
[04:10:40] <roh> no.
[04:10:47] <roh> that sounds like a bad idea
[04:10:55] <roh> needs to work unattended
[04:56:23] <tom3p> insulate the workpiece, add a tiny 12V current between tool an wkpc, detect contact from tool to workpc, also detect spindle motion. IF spindle motion AND contact THEN cutting (until some clever dick figgers how to fake it ) log that signal
[04:56:31] <tom3p> roh ^^^
[04:57:03] <tom3p> a couple milliampers is enuf
[04:57:58] <tom3p> uh just figgered how to faek it easy... jumper clip with spindle on... dont tell the operators ;)
[05:05:26] <roh> tom3p that only works on metal
[05:10:11] <tom3p> uh, yep
[05:12:10] <tom3p> gnite folks
[05:47:06] <MrSunshine> http://imagegcode.com/main.htm that page is nice .. but outputs wrong type of gcode :P
[06:55:32] <awallin_> tom3p: did you get your edge-comp timing figured out?
[06:56:20] <tom3p> :) now i have a hal 'axis' that runs between 2 limits, position in between controlled by process, velocity controlled by process ( getting real close to being edm capable :)
[06:56:58] <tom3p> awallin_: hi, edge just doesnt work, but i got lots more doen by taking another approach
[06:57:45] <tom3p> i have depth stop & retract limits and dicular & square orbitign 'working' with dummy voltage.
[06:58:10] <tom3p> circular, too tired ... g'nite
[08:09:43] <MrSunshine> gah i need smaller endmills that doesnt have thick shafts
[08:10:00] <MrSunshine> all i have have 6 or 10mm shaft, and the tips is like 4, 5, 6, 8 and 10
[08:55:06] <MattyMatt> MrSunshine: Dremel bits are all 1/8" or less
[09:03:04] <MattyMatt> mine is 0.090" end on 0.093" shaft
[09:51:44] <KA1> hello
[09:53:52] <Valen> zup
[09:55:31] <micges_work> hi
[10:19:35] <alex_joni> http://www.youtube.com/watch?v=GcDshWmhF4A
[10:30:26] <Valen> a ways to go before it can play pong though
[10:38:51] <piasdom> g'mornin all
[10:39:45] <alex_joni> Valen: not much :D
[10:39:55] <alex_joni> imagine 3-400 ALUs like these in parallel
[10:40:08] <alex_joni> and you can soon render some nice games
[10:40:31] <Valen> I think you would run into fundamental speed issues
[10:41:13] <archivist> you need a cnc to mass produce the parts
[10:41:53] <Valen> cnc powered by marbles?
[10:42:25] <Valen> I wonder if you could make some kind of programming language with different sized marbles
[10:42:37] <Valen> big one for branch small one for add etc
[10:42:52] <Valen> not quite general purpose but a dedicated interperter chip
[10:52:36] <MarkusBec_away> MarkusBec_away is now known as MarkusBec
[11:00:57] <alex_joni> Valen: you build more advanced logicl ops out of additions
[11:01:11] <alex_joni> mul's, div's, branches, branch prediction, etc
[11:01:17] <Valen> yeah but its slow
[11:01:42] <alex_joni> depends on the marble speed
[11:02:01] <Valen> well you would have to worry about ringing and clock skew
[11:04:04] <archivist> well do what the early computers did, bit serial
[11:04:55] <archivist> use a helix to produce a delay line/shift register
[11:05:40] <Valen> Its all possible of course, I was just thinking in trinary out of the box
[11:06:33] <alex_joni> you can do smarter things
[11:06:40] <alex_joni> change materials for delay lines
[11:06:52] <alex_joni> put some felt or whatever to make marbles drop slower
[11:25:47] <Valen> think http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=180427428851&_trkparms=tab%3DWatching#ht_2252wt_1165 would cut it for a plasma cutter
[11:26:02] <Valen> needs to hit ~100-200mm/sec
[11:26:24] <Valen> call it 200 inches per minute
[11:26:32] <Valen> with +-.5mm accuracy
[11:27:19] <alex_joni> logger_emc: bookmark
[11:27:19] <alex_joni> Just this once .. here's the log: http://www.linuxcnc.org/irc/irc.freenode.net:6667/emc/2009-12-07.txt
[11:40:00] <alex_joni> hmm.. still counting the results.. seems our elections will be close this year
[11:40:09] <Jymmm> ?
[11:40:13] <alex_joni> <0.5% difference between the two
[11:40:19] <alex_joni> Jymmm: president elections in romania
[11:40:34] <alex_joni> current difference is about 80k people
[11:40:56] <Jymmm> Dracula -vs- Wolfman for President?
[11:41:39] <alex_joni> well.. we have a sailor vs. a commy
[11:41:56] <Jymmm> Commy, really?
[11:42:12] <alex_joni> socialist actually
[11:42:29] <Jymmm> is there a difference?
[11:42:36] <alex_joni> * alex_joni sees red as the same color we had before the revolution
[11:42:43] <alex_joni> semantics I guess :D
[11:42:47] <Jymmm> =)
[11:42:53] <alex_joni> actually there is (joke aside)
[11:44:21] <alex_joni> http://en.wikipedia.org/wiki/Socialism vs. http://en.wikipedia.org/wiki/Communism
[11:44:24] <Jymmm> Hmmm, I'm really not political, so eh
[11:49:32] <alex_joni> lots of words there ;)
[11:49:52] <Jymmm> alex_joni: UnRar for OSX is zipped! go figure
[11:50:09] <alex_joni> well.. it's 50.37 vs. 49.62 (80k votes difference), and still about 90k votes to count
[11:50:21] <alex_joni> so it's a close one
[11:50:27] <alex_joni> Jymmm: anyone knows zip :P
[11:50:37] <Jymmm> ?
[11:52:16] <Jymmm> alex_joni: I didn't get the joke, sorry
[11:52:36] <alex_joni> I mean most (if not all) OS'es have support for zip
[11:52:46] <alex_joni> at least win does since xp
[11:53:03] <archivist> you cannot wrap a decoder in its own encoding to a box without the said encoding
[11:53:06] <Jymmm> alex_joni: Oh that I know, just ironic that an archiver needs an archiver to unarchive
[11:53:24] <alex_joni> you need a compiler to compile a compiler :P
[11:53:27] <archivist> not ironic at all
[11:53:36] <Jymmm> as opposed to being just a plain executable
[11:53:37] <alex_joni> archivist: they could use a self-extractor
[11:53:51] <dimas> * dimas wishes the best president for alex_joni
[11:53:58] <archivist> that would be a security risk
[11:54:04] <alex_joni> dimas: yah, that's a funny one ;)
[11:54:11] <alex_joni> but thanks anyways :P
[11:54:19] <archivist> you can always shoot a bad president
[11:54:20] <alex_joni> I'm sure the best one isn't running
[11:54:28] <Valen> winrar for PC is a self extracting executable thingie
[11:55:02] <alex_joni> for PC?
[11:55:02] <alex_joni> /kick Valen
[11:55:02] <Jymmm> Wolfman for Pres! (or at least that topless Italian chick)
[11:55:02] <Valen> topless chic for PM
[11:55:06] <Valen> ey at least she would get 50% of the vot
[11:55:07] <Valen> vote
[11:55:08] <alex_joni> Jymmm: that's the First Lady fyi
[11:55:21] <alex_joni> the french First Lady
[11:55:46] <Jymmm> alex_joni: Is she now? I thought she was like a senator or whatnot
[11:55:52] <alex_joni> carla bruni
[11:56:06] <alex_joni> that might be some other topless chick you're talking about :P
[11:56:26] <Jymmm> Nope, that's her
[11:56:43] <dimas> alex_joni, it's that strange that the best could come from comminists.. yet again
[11:56:51] <dimas> as we have it here
[11:57:06] <alex_joni> dimas: people have a short memory :D
[11:57:24] <dimas> /me remember all.. :)
[11:57:45] <alex_joni> I was 9 during the revolution, but I still wouldn't vote like that ;)
[11:58:26] <Jymmm> alex_joni: No, I dont that that was her, must be another one.
[11:58:39] <alex_joni> probably so
[11:58:54] <alex_joni> ~10 more minutes before fresh results
[12:03:01] <Jymmm> http://en.wikipedia.org/wiki/Mara_Carfagna
[12:18:15] <alex_joni> whee.. 50.33%/49.66% now
[12:18:21] <alex_joni> 99.95% votes counted
[12:18:29] <jthornton> cool
[12:18:36] <alex_joni> yup
[12:21:43] <Jymmm> RECOUNT!!! RECOUNT!!!
[12:22:31] <alex_joni> the loser side is prepared to file a fraud report, guess we'll see what happens
[12:22:50] <Valen> I think i saw this one already
[12:23:10] <Valen> there were 5 recounts, lots fo court cases and the nutter got in anyway
[12:24:01] <alex_joni> Jymmm: http://juve.ro/blog-files/photography/01257205797/DSC_0711.jpg <- that's the guy leading currently
[12:24:29] <Jymmm> OK, (not like it's gonna work, but...) To try and cya for your wives/gf's.... http://findarticles.com/p/articles/mi_qn4161/is_20000611/ai_n14504639/
[12:24:59] <Jymmm> alex_joni: Oh you met him in person?
[12:25:29] <alex_joni> he dropped by at my wedding ;)
[12:26:02] <Jymmm> alex_joni: does your family have political ties?
[12:27:07] <alex_joni> heh, not at all
[12:27:23] <Jymmm> alex_joni: And look at you in a tux.... baby face!
[12:27:25] <alex_joni> he stayed at a hotel nearby
[12:27:53] <alex_joni> he stopped the limo, and climbed out to congratulate us, then drove further
[12:28:03] <Jymmm> Well, a wedding recetion is a good spot to hit a lot of ppl
[12:28:24] <Jymmm> that's cool
[12:28:29] <alex_joni> yeah, I thought so too
[12:28:37] <Jymmm> that's the sailor?
[12:28:42] <alex_joni> yup
[12:29:13] <Jymmm> where did they get the flowers from?
[12:29:32] <alex_joni> we gave him the flowers ;)
[12:29:38] <Jymmm> Oh, heh
[12:29:48] <alex_joni> a bit reversed .. but it works for a president
[12:30:12] <Jymmm> Yeah, security doesn't look too pleased =)
[12:30:40] <alex_joni> "B.sescu graduated from the Naval Institute of Constan.a in 1976 and became a Merchant Marine[4] Officer at Navrom, the Romanian state-owned shipping company. Between 1981 and 1987 he served as Captain on Romanian commercial ships. In 1984 he was promoted to Captain of the oil tanker Biruin.a, the largest ship of the then Romanian commercial fleet."
[13:12:38] <MrSunshine> MattyMatt, but that requires one heck of a high rpm doesnt iT? :)
[14:10:27] <MrSunshine> yeey my first successfull aluminium milling =)
[14:10:54] <MrSunshine> a bit rough .. but according to my stuff i measure with ive got some backlash in Y axis, but like none in X =)
[14:12:14] <MrSunshine> was supposed to be 20mm thick ... when measuring its a digital shooting measure or whatever its named =)
[14:12:21] <MrSunshine> it ended up at 20.00
[14:13:10] <MrSunshine> problem was driling as i didnt have a center drill to start off with
[14:13:34] <MrSunshine> a long 6mm drill kinda swings wherever it wanted .. but still ive got tolerances of like +- 0.5mm on the drill holes so no biggie =)
[14:27:43] <MrSunshine> Digital Caliper
[14:27:47] <MrSunshine> maybe the name is =)
[14:30:34] <archivist> guessing stick
[14:30:50] <MrSunshine> yeah :P
[14:30:56] <MrSunshine> 0.02 rated accuracy
[14:31:17] <archivist> Mitutoyo are very good
[14:31:44] <MrSunshine> i think my definition of accuracy differ from you guys ... never been in cnc application so i know nothing about what accuracy to expect from a homebrew machine =)
[14:32:15] <archivist> most seem happy with .001"
[14:48:21] <MrSunshine> ok =)
[14:48:47] <MrSunshine> well thats about 0.025 then ?
[14:49:09] <MrSunshine> its ALOT ALOT ALOT better then one can do by hand atleast =)
[14:49:14] <MrSunshine> but getting lower doesnt hurt :P
[15:15:31] <numen_> numen_ is now known as numen
[15:16:28] <numen> hi
[15:44:11] <dan1mal_garage> i've had some mitutoyo digital callipers for nearly 10 years now
[15:44:36] <dan1mal_garage> and i abuse the hell out of them
[15:44:48] <dan1mal_garage> so far so good
[15:45:11] <archivist> I check mine with a glass standard, they are effing good over time
[15:45:47] <dan1mal_garage> mine are a little worn at the tips, but yea, i never have to calibrate them
[15:46:14] <archivist> bashing the points and cleaning the burrs is the main maintenance
[15:46:31] <dan1mal_garage> yea
[15:46:47] <archivist> also the adjusting screws come loose
[15:47:17] <archivist> but that seems to be on the newer ones without the wheel
[15:47:18] <dan1mal_garage> mine havent, but it appears they could use some adjustment
[15:47:31] <dan1mal_garage> i've never touched them
[15:48:31] <dan1mal_garage> i should order another set and save those for closer work
[15:49:11] <dan1mal_garage> i need some larger mics too
[15:49:41] <dan1mal_garage> now that i dont work for someone, i have to buy all this stuff now
[15:49:42] <archivist> Ive almost given up on the use of micrometers
[15:50:26] <dan1mal_garage> i use them for tooling
[15:50:45] <dan1mal_garage> in case i need to make a bung or something
[15:51:35] <dan1mal_garage> man it's raining here
[15:51:41] <dan1mal_garage> for the first time in a while
[15:53:35] <dan1mal_garage> adios, time for breakfast!
[17:59:41] <issy> hi all
[18:14:50] <skunkworks_> heh - look at the mach display.. http://actmachines.com/cart/
[18:16:24] <bill20r3> must be a demo-gcode shortage over there.
[18:26:37] <dan1mal_garage> any other options besides the 5i20?
[18:26:49] <dan1mal_garage> that are a similr price?
[18:26:59] <dan1mal_garage> they are out of them and i need one asap
[18:27:19] <eric_unterhausen> I thought they had more expensive versions
[18:27:39] <eric_unterhausen> are they too expensive?
[18:27:40] <dan1mal_garage> yea
[18:27:43] <SWPadnos> 5i22 or 5i23
[18:28:01] <eric_unterhausen> get the parport version for now
[18:28:03] <SWPadnos> what features of the 5i20 do you need?
[18:28:19] <SWPadnos> there are other parport-connected devices, such as the ones from Pico Systems
[18:28:43] <SWPadnos> there are other PCI-connected systems, such as the ones from Servo-to-go and Motenc
[18:28:48] <dan1mal_garage> well, i just need it to work with the 7i33, 7i37, and 7i42
[18:29:04] <eric_unterhausen> that's why I say parport
[18:29:11] <SWPadnos> none of the others have reconfigurable FPGAs, so none will work with the Mesa daughtercards
[18:29:12] <eric_unterhausen> swap it out for the 5ixx later
[18:29:25] <dan1mal_garage> isnt parport slower?
[18:29:29] <SWPadnos> yes
[18:29:43] <eric_unterhausen> question is: fast enough or not?
[18:29:50] <SWPadnos> that may be irrelevant though, unless you need > 5 KHz servo rates
[18:29:50] <skunkworks_> did they give you a lead time?
[18:30:12] <dan1mal_garage> probably wouldnt get it till after xmas
[18:30:28] <SWPadnos> the 5i23 is $30 more than the 5i20 ...
[18:30:29] <dan1mal_garage> cant wait that long, i only have this month before i reopen the shop
[18:30:47] <dan1mal_garage> yea i just saw that SWPadnos
[18:31:17] <dan1mal_garage> is everything the same aside from the extra pins?
[18:31:22] <dan1mal_garage> looks to be
[18:31:26] <SWPadnos> no, that's the 5i22
[18:31:49] <SWPadnos> the 5i23 has 3 I/O connectors like the 5i20, but it has a 400kgate FPGA instead of 200k
[18:32:02] <SWPadnos> also it's a spartan3 instead of spartan2
[18:32:12] <dan1mal_garage> ahh
[18:32:49] <dan1mal_garage> will it be relatively the same as far as emc is concerned, other than the speed?
[18:32:57] <SWPadnos> yes
[18:33:12] <SWPadnos> it's supported, like the other PCI cards
[18:33:34] <SWPadnos> there may be additional benefits later, as configs are made that won't fit in a 5i20, but will fit in the larger FPGAs
[18:33:47] <dan1mal_garage> hmm
[18:33:57] <dan1mal_garage> thanks for the info
[18:34:37] <SWPadnos> technically, it's also capable of faster operation (filtering, PWM, stepgen, encoders, plus any other processing that might be done in the future), but I don't know if that has any practical benefits with the current firmware or drivers
[18:34:40] <pjm> dan1mal_garage , hi, i have the 7i43 controlling my mill, no complaints at all, plenty of IO and very quick for reading encoders etc
[18:35:56] <issy> hi all , i am still having troubles in getting my system to work with 2 servo motors on x axix ( gaintry) ... any ideas
[18:36:25] <eric_unterhausen> issy: what are the problems?
[18:36:27] <dan1mal_garage> thanks guys
[18:37:29] <dan1mal_garage> pjm, i might need more than what the 7i43 offers, looks like it only has 2 50 pin connectors, and i'll have 3 daughter cards
[18:37:43] <issy> well , the system is gaintry , so i have 2 motors on x axis , generaly there is no problem to copy the command for x to x1 , but the problem is in getting homming independetly for both motors
[18:37:49] <pjm> dan1mal_garage ahh ok yeah in that case...
[18:38:22] <pjm> i ended up making custom cables for my various daughter cards so the IO went to the pins i wanted as opposed to those when using straight thru cables
[18:38:44] <dan1mal_garage> well i guess i could buy 2
[18:38:44] <dan1mal_garage> but then i'd need an additional par port
[18:38:44] <issy> the system use 7i43 card with servos
[18:38:55] <SWPadnos> dan1mal_garage, if they don't have anything in stock, let me know. I have a 5i22 and 5i23 here, and I think there's a 5i20 around as well. I won't need them before the end of the year, so I can send you one of mine and you can send me a replacement. (hell, I may want to trade up on the 5i20 anyway)
[18:39:51] <dan1mal_garage> appreciate it SWPadnos. where are you located?
[18:39:58] <SWPadnos> Vermont
[18:40:28] <dan1mal_garage> cool not too far, usps priority would get it here in a few days
[18:40:34] <SWPadnos> yep
[18:40:55] <SWPadnos> I'd have to know by Wednesday though, I'll be out of town from the 10th-15th
[18:41:11] <dan1mal_garage> they're gunna call me back and let me know if they have one kicking around
[18:41:21] <SWPadnos> ok
[18:41:26] <dan1mal_garage> no prob, i'll know today
[18:41:33] <SWPadnos> ok
[18:41:37] <dan1mal_garage> thanks alot, much appreciated
[18:41:47] <SWPadnos> no problem
[18:44:06] <dan1mal_garage> i'm excited to get this lathe going, it'll be my first time with servos
[18:44:24] <dan1mal_garage> the mill was easy since it was steppers
[19:29:35] <MattyMatt> issy, do you want independent homing?
[19:30:31] <MattyMatt> too slow :)
[19:31:28] <MattyMatt> and homming was something else in our playground, something to be avoided
[20:14:55] <dan1mal_garage> SWPadnos, i am all set, mesa found one for me. appreciate the offer!
[20:15:09] <SWPadnos> ok, great
[20:17:43] <MrSunshine> hmm, i wonder what they would take for precision grind a stock material for me .. so i can have it as a distance so the milling tool does not cut the mills table
[20:17:52] <MrSunshine> like 3mm thick +- 0.001 :P
[20:18:20] <MrSunshine> ofc i did work there before so they might not take anything :P
[20:18:30] <archivist_attic> cutters vary in length
[20:18:50] <MrSunshine> archivist, to me ?
[20:19:10] <archivist_attic> yes
[20:19:38] <MrSunshine> archivist_attic, its supposed to be for touching off and knowing the offset the material has from the table
[20:19:41] <archivist_attic> not hitting the table is the users problem
[20:19:59] <MrSunshine> hell maybe even should let them precision grind my table :P
[20:20:23] <MrSunshine> archivist, yes .. and thats why i want a stock material that is exactly say 3mm thick .. so i can offset the material to be milled FROM the table .. as I AM the user
[20:20:32] <archivist_attic> having a good flat table is a good idea
[20:21:01] <dan1mal_garage> i use a 1 inch ground block
[20:21:31] <dan1mal_garage> i like it a little thicker so i can get my fingers around it
[20:21:57] <dan1mal_garage> instad of on top of it, so my finger doesnt get crushed
[20:21:58] <MrSunshine> dan1mal_garage, wel the pieces im talking about is supposed to be layed out on the table then the workpiece strapped down to them to the table :P
[20:22:00] <archivist_attic> I usually am refering to a rotary center
[20:22:25] <MrSunshine> archivist, well i dunno how flat my table is =)
[20:22:51] <archivist_attic> measure and rectify
[20:23:29] <dan1mal_garage> oh, i just put mine on top of the work pice and bring down the tool to touch off
[20:23:38] <archivist_attic> or two spare flats and scrape :)
[20:24:42] <MrSunshine> dan1mal_garage, yeah .. have to have one piece to do that with also :)
[20:24:43] <dan1mal_garage> hmmm i need another hoffman enclosure
[20:24:52] <MrSunshine> and that can be an inch or 20mm or whatever
[20:24:58] <MrSunshine> as long as it also has a given size
[20:25:15] <dan1mal_garage> are you talking about a piece just to protect your table from the cutter if it goes too deep?
[20:26:01] <MrSunshine> dan1mal_garage, the small ones yes
[20:26:11] <MrSunshine> so that i put it at the edges of the work piece
[20:26:14] <MrSunshine> offsetting it from the table
[20:29:03] <dan1mal_garage> if it's something you make alot, i'd make some sort of fixture
[20:29:29] <dan1mal_garage> but for onesie twosies, some standoff blocks will work great
[20:31:36] <dan1mal_garage> depending on what your milling, you can even use tape
[20:31:59] <dan1mal_garage> i've laid down some masking tape if i know i only need a few thousandths clearance
[20:48:12] <piasdom> MrSunshine; why not a 1-2-3 block ?
[20:48:24] <MrSunshine> piasdom, what is that? :)
[20:48:48] <MrSunshine> hmm, anyone into heekscad and know if i can add more then one circle at the same time ?
[20:50:56] <piasdom> a Precision
[20:50:56] <piasdom> block 1 inch by 2 inch by 3 inch
[20:51:21] <piasdom> usually +- .0005"
[22:01:32] <ChanServ> [#emc] "This is the #emc channel - talk related to the Enhanced Machine Controller and general machining. Website: http://www.linuxcnc.org/, wiki at http://wiki.linuxcnc.org/"
[22:05:12] <ChanServ> [#emc] "This is the #emc channel - talk related to the Enhanced Machine Controller and general machining. Website: http://www.linuxcnc.org/, wiki at http://wiki.linuxcnc.org/"
[23:26:28] <mikegg> where does one stick header files so that comp will find them?
[23:28:16] <mikegg> ah. nevermind
[23:53:47] <Jymmm> skunkworks365: ping
[23:55:20] <andypugh> eBay ad with too much info. :
[23:55:22] <andypugh> This came from peatol machine tools in the UK , It came complete with motor and stepper mounts, it has 3 stepper motors and the main drive motor fitted, it has a collet chuck,collet and a milling cutter fitted, im selling it ( and some other machines ) as i need space for a new superglue filling machine that wont fit in the factory this machine is not owned by the company its privately owned and not been used for use for the comp
[23:55:22] <andypugh> just private use, i store it at work as i have no room at home due to my citrus trees in the house!