#linuxcnc | Logs for 2013-11-09

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[00:07:27] <Tom_itx> what would you consider a good press fit for a bearing?
[00:08:01] <Tom_itx> .001" ?
[00:08:33] <andypugh> The bearing catalogues go into great detail. It depend on the mounting.
[00:08:35] <Tom_itx> smallish bearing R6 R8
[00:08:48] <Tom_itx> standard dimensions
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[00:09:11] <Tom_itx> 1.125 for the 8 and .875 for the R6
[00:09:36] <andypugh> I think it varies for static inner or static outer, and if it is interference both sides.
[00:10:33] <Tom_itx> http://tom-itx.dyndns.org:81/~webpage/kat/Bellhousing7.jpg
[00:10:35] <Tom_itx> is one
[00:10:44] <Tom_itx> http://tom-itx.dyndns.org:81/~webpage/kat/Bellhousing6.jpg
[00:12:13] <andypugh> I have typically either guessed for my own stuff, or worked through the bearing catalogue recomendations for work stuff.
[00:15:09] <Tom_itx> i guessed
[00:15:21] <Tom_itx> and hoped for the best on that old lathe
[00:16:02] <Tom_itx> http://tom-itx.dyndns.org:81/~webpage/kat/bell_brushend2.jpg
[00:16:07] <Tom_itx> R6 end
[00:17:04] <Tom_itx> end housings to replace bushings on some old mower starter motor
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[03:49:30] <MacGalempsy_> evening
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[05:37:59] <jesseg> LOL. I don't know if this kind of question is allowed, but If I'm on a budget la grande, and I need to buy a 5mm0.8 tap, would master mechanic or Irwin/Hason be better? :P LOL
[05:38:29] <jesseg> Irwin's are etched USA, master mechanic china or something
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[06:05:10] <sirdancealot3> is there something smarter than https://github.com/mattvenn/cad/blob/master/tools/etchZAdjust/Etch_Z_adjust.2.2.py ? something with two steps, first probing and saving the values, second loading them and milling?
[06:07:44] <MacGalempsy_> i guess it depends on what you are tapping?:
[06:08:23] <MacGalempsy_> go a set of the irwin/mason and never had any issues
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[06:27:22] <sirdancealot3> or just add some debugging..
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[07:39:42] <_DJ_> moin
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[08:33:48] <archivist> jesseg, Dormer is a good make of tap
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[09:36:05] <MacGalempsy_> morning
[09:36:16] <_DJ_> morning MacGalempsy
[09:51:29] <MacGalempsy_> whats going on dj?
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[11:10:05] <MacGalempsy_> << banging head against the wall. trying to understand programming is driving me up the wall
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[11:35:49] * _DJ_ puts a soft pillow between the wall and MacGalempsy's head
[11:39:37] <jthornton> it's like the pygmy that ate the elephant... one bite at a time
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[12:37:44] <MacGalempsy_> heh.
[12:38:03] <MacGalempsy_> what would be ideal woudl be to pay someone to set it up!
[12:40:19] <jthornton> then you don't know what you have and can't fix it
[12:40:48] <MacGalempsy_> true, but most likely it would be more like a paid tutor
[12:42:06] <jthornton> are you stuck somewhere or just lost?
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[12:43:12] <MacGalempsy_> well, I have got the pins list. and went through the basic pnc config. now have a HAL and INI file,
[12:43:34] <MacGalempsy_> going through your example, but there is just a lot to swallow
[12:43:57] <MacGalempsy_> I guess its time to go through the integrators manual more
[12:44:48] <jthornton> I find the pncconf configuration to be a bit confusing due to things put in the INI file that do nothing
[12:45:28] <jthornton> if you use that be aware of that
[12:46:22] <jthornton> this is the chapter you want to read a few times http://linuxcnc.org/docs/html/hal/basic_hal.html
[12:46:28] <jthornton> it's short and to the point I hope
[12:47:03] <MacGalempsy_> I will go through that again
[12:47:05] <jthornton> and this section http://linuxcnc.org/docs/html/config/ini_config.html#_custom_sections_and_variables_a_id_sub_custom_variables_a
[12:47:31] <MacGalempsy_> one thing, why is DIR out and the pin named in?
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[12:47:45] <jthornton> read the above a few times
[12:48:16] <MacGalempsy_> ok. will do
[12:48:44] <jthornton> take a look at the figure in this section http://linuxcnc.org/docs/html/hal/basic_hal.html#_net_a_id_sub_net_a
[12:50:00] <jthornton> which pin are you looking at?
[12:51:07] <MacGalempsy_> can I net all the connections before calling the functions?>
[12:52:10] <jthornton> If I understand your question you have to load a component first then usually you add the function to a thread then create the nets
[12:52:24] <MacGalempsy_> ah, ok top down
[12:52:40] <jthornton> but I'm not sure exactly what you mean by calling the functions
[12:52:50] <MacGalempsy_> i guess one thing is I am scared that misprogramming will screw something up
[12:53:30] <jthornton> yes, I can understand that. My approach is to do one thing at a time and test
[12:54:12] <jthornton> first you need a configuration that runs, then you can add and test each axis then the I/O etc
[12:54:26] <MacGalempsy_> I want to start with the servo motors, but need some custom variables for all the pins coming from the amplifier
[12:55:19] <MacGalempsy_> so maybe I should start with the on/off and estop
[12:55:21] <jthornton> can you describe what you mean by custom variables
[12:55:29] <MacGalempsy_> heh. that way I can stop it if things get screwed up
[12:55:34] <jthornton> estop is a good starting point
[12:55:45] <jthornton> do you have a physical estop?
[12:55:48] <MacGalempsy_> like amplifier reset, enable, fault
[12:55:55] <MacGalempsy_> yes there is one on the front panel
[12:56:10] <jthornton> ok those are just I/O
[12:56:54] <MacGalempsy_> I am pretty sure everything I have connected is done right. the only issues I had wiring was the magnetic door lock and the coolant pump
[12:57:26] <MacGalempsy_> if the encoder is 2500 count, is that everything, or each channel?
[12:57:41] <jthornton> If you start with the sample configuration and add one thing at a time it might be better than using the wizard in the long run
[12:58:18] <jthornton> for example here is the external estop http://linuxcnc.org/index.php/english/forum/47-hal-examples/25861-external-e-stop
[12:58:55] <jthornton> usually the count is x 4 for how many pulses you get per rev
[12:59:19] <jthornton> so a 2500 count encoder is 10,000 pulses per rev
[12:59:26] <MacGalempsy_> ok
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[13:19:31] <PetefromTn> ////////////////////////////////////////////////////////
[13:19:56] <jthornton> PetefromTn, is asleep at the wheel I think
[13:20:56] <PetefromTn> LOL actually my wireless keyboard battery was dying .
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[13:21:43] <PetefromTn> just had to put a new battery in it now we are working LOL.... It actually just stuck on the last thing I typed LOL.
[13:22:11] <PetefromTn> I LOVE my wireless keyboard tho and the batteries last a couple months so far.
[13:22:20] <PetefromTn> jthornton: How are you this morning?
[13:23:27] <jthornton> good, just fixing to head for breakfast
[13:23:59] <PetefromTn> head to the kitchen or head to a restaurant?
[13:25:52] <jthornton> to a nice little restaurant that used to be a purple cow lol
[13:29:21] <PetefromTn> enjoy man.... here's my latest attempt at 3d cad... http://imagebin.org/276317
[13:33:49] <jthornton> nice what did you draw that in?
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[13:37:14] <PetefromTn> freecad
[13:37:44] <PetefromTn> managed to get it to NOT crash for awhile LOL
[13:38:59] <PetefromTn> Trying to figure out how to put some scalloped cuts around the top edge of the part equidistant spaced .
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[13:48:03] <Tom_itx> learn to estop before you can crawl, walk , run , dance, jump for joy!
[13:48:55] <PetefromTn> yup definitely gotta have estop first...been there done that. Broke stuff..etc. etc.
[13:50:05] <Tom_itx> i just like jthornton's approach
[13:50:29] <PetefromTn> and what is that precisely?
[13:50:41] <Tom_itx> read the log
[13:50:44] <Tom_itx> it's all there
[13:52:36] <Tom_itx> PetefromTn, what's it for? looks like an over fancy pulley
[13:52:59] <PetefromTn> Its for my target scope... its an adjustment wheel.
[13:53:11] <Tom_itx> with a weak spot in the horizontal to vertical plane
[13:53:31] <PetefromTn> Ive made quite a few manually but this will be the first made in the VMC hopefully.
[13:53:48] <PetefromTn> huh?
[13:54:01] <Tom_itx> maybe not but it looks a bit thin there
[13:54:17] <Jymmm> PetefromTn: Did you ever sell that pea shooter you had?
[13:54:36] <PetefromTn> Which one?
[13:54:47] <Jymmm> the $6000 one?
[13:55:01] <PetefromTn> I guess so because the only one I have left is the home built pistol I made.
[13:55:01] <Tom_itx> and i'd personally radius the transition
[13:55:17] <Tom_itx> top and bottom
[13:55:33] <Jymmm> it was blue and your friend banged it into a wall
[13:55:37] <PetefromTn> Oh that one no that was not mine, that was just to show the wheel I machined that I sold to a friend. It was his rifle that was for sale.
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[13:56:03] <Jymmm> did he sell it?
[13:56:04] <PetefromTn> I WISH it was mine it would not be for sale LOL.
[13:56:05] * Tom_itx gives Jymmm one of jt's cannons with a pea in it
[13:56:15] <PetefromTn> Dunno why are ya interested?
[13:56:52] <Jymmm> I'm interested in knowing if someone paid $6000 for a pellet rifle =)
[13:56:59] <Jymmm> used
[13:57:01] <Tom_itx> heh
[13:57:07] <Jymmm> and all banged up
[13:57:08] <PetefromTn> Oh there's LOTSa folks who would...
[13:57:23] <Jymmm> But DID they is the question =)
[13:59:13] <PetefromTn> I think it was like $3.5k for the whole package and I think he sold the scope for like $1k seperately with the wheel on it. Last I checked the rifle was still for sale for $2k or so.
[13:59:18] <Tom_itx> PetefromTn, what's your approach to milling that to minimize chatter?
[13:59:32] <PetefromTn> Honestly dunno LOL
[13:59:49] <Jymmm> A REAL estop contains one or more safety relays, not some lines of code... http://linuxcnc.org/index.php/english/forum/47-hal-examples/25861-external-e-stop
[14:00:11] <Tom_itx> Jymmm, estop is the plug in the wall
[14:00:25] <Jymmm> Tom_itx: Not necessarily
[14:00:31] <PetefromTn> When I made them manually I typically milled and drilled the hole pattern and then contoured it in the lath..
[14:00:35] <Jymmm> Tom_itx: some needs brakes
[14:00:39] <archivist> Tom_itx, chatter can be a machine problem
[14:00:45] <PetefromTn> lathe
[14:00:51] <Tom_itx> archivist yes to a point
[14:01:11] <PetefromTn> hes right tho even in the lathe this thing will ring like a tuning fork...LOL
[14:01:34] <PetefromTn> Gotta go real gentle like with light cuts and it still rings.
[14:01:45] <Tom_itx> if you're gonna lathe it, i'd probably do that first
[14:01:47] <archivist> listenf to the frequency, feel around for what is vibrating
[14:01:53] <Tom_itx> then mount it in a fixture
[14:02:05] <Jymmm> fixture is a good idea
[14:02:07] <PetefromTn> nope cant do that first drills wander bad then
[14:02:08] <Tom_itx> just don't feel the tools
[14:02:21] <Tom_itx> spot drill them
[14:02:46] <Tom_itx> or drill the perimeter holes first
[14:02:54] <PetefromTn> Oh it will get a fixture but for the CNC work flow I am gonna mill the holes and drill the smaller holes and then machine MOST of the contours in it followed by insert in the lathe to clean up..
[14:04:28] <Jymmm> Anyoen know where I coulld find thrust bearings apx 3" OD x 2.75" ID ?
[14:04:36] <Tom_itx> roller?
[14:04:40] <Tom_itx> still looking ehh?
[14:04:41] <Jymmm> sure
[14:04:44] <Jymmm> yeah
[14:04:54] <Tom_itx> i used to have a catalog....
[14:04:59] <PetefromTn> I plan to just pop the chunk of aluminum up on sacrificial jaws with a step for the first cuts and perimeter leaving some material to hold onto then flip it to cut away into the rest in a pair of machined jaws...
[14:05:00] <Tom_itx> probably tossed it by now
[14:05:04] <Jymmm> 3" OD is easy, but the ID being the issue
[14:05:11] <Tom_itx> small rollers
[14:05:26] <Jymmm> yeah
[14:05:27] <Tom_itx> high speed applications
[14:05:33] <Jymmm> no
[14:05:39] <Jymmm> just need smooth
[14:05:40] <archivist> http://www.arceurotrade.co.uk/Catalogue/Bearings
[14:05:46] <Tom_itx> for the mouse?
[14:05:57] <Jymmm> trackball, yeah
[14:06:05] <Tom_itx> i got some nice bearings from barden long time back
[14:06:15] <Tom_itx> see what they have
[14:07:25] <Tom_itx> yep, i tossed all my bearing catalogs, they were getting pretty dated
[14:08:39] <archivist> I never toss bearing catalogues
[14:08:56] <Tom_itx> i bet you never toss anything... you're the archivist!
[14:09:08] <archivist> most types are current for eons
[14:09:32] <Tom_itx> limited space, something must go
[14:12:52] <Jymmm> http://www.skf.com/binary/12-34147/06003_1_EN_Needle-roller-bearings.pdf
[14:14:15] <Jymmm> Nice reference material in there too
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[14:23:58] <PetefromTn> I got a question for you seasoned machininsts out there....
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[14:24:26] <PetefromTn> When I machine this top side of that part and leave the flashing on the bottom to hold onto and then go to flip it over..
[14:25:02] <PetefromTn> I am gonna machine some female sacrificial jaws using the same drawing and just changing the offset of the cut from an outside to an inside.
[14:25:44] <Jymmm> Why not just mount it to it's hub?
[14:26:03] <PetefromTn> Do you typically just use the same tool settings or do you add in some extra width for the mating of the parts into the jaws ?
[14:26:47] <PetefromTn> I am gonna machine its hub second and besides I doubt it will be strong enough to offset the cut forces in those delicate areas. Gotta hold onto the perimeterI think.
[14:26:53] <archivist> each part has its own problems...depends
[14:28:26] <PetefromTn> yeah I know but I am asking TYPICALLY when you make a female sacrificial jaw using the same drawing as a Cam guide and change the cutter offset from inside to outside do you just leave it as it is or add in some cutter compensation to give it a little extra room?
[14:28:59] <PetefromTn> or rather outside to inside..
[14:29:35] <archivist> I dont have a typical nor have I done that
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[14:35:30] <Jymmm> Bearing Apps https://play.google.com/store/apps/developer?id=SKF
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[14:46:44] <Jymmm> Is there anything automotive that uses thrust bearings?
[14:47:03] <PetefromTn> I am surprised to hear you have not done that. Flipping parts into sacrificial jaws is a very common machining method apparently. I have done it a bunch but I have not done a wheel like this before. I am just wondering if I should use No comp or no additional offset to machine the female pocket into the jaws. Probably nothing but I was wondering what you guys do>
[14:48:31] <archivist> most of my work has been round and on a lathe, used soft jaws often, no cam involved though
[14:49:47] <archivist> even to the extent of wooden press fit chucks so machined shiny parts done get marked
[14:49:50] <PetefromTn> Okay thanks, was hoping for information from the milling and VMC guys here LOL.
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[14:50:31] <PetefromTn> yeah I use leather often to hold shiny bits LOL..
[14:52:04] <archivist> I have an jig here which was machined up on the 4 axis at the time so I could machine a batch of gears on the rotary
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[15:08:56] <PetefromTn> It seems to me that if you are machining a round piece and you make a pocket to hold it one side of which has a fixed jaw and the other a moving jaw then if you add or subtract anything from the pocket over the size of the part your center will be off half that diameter. At least I think that is correct.
[15:10:13] <archivist> my pockets are sized or they include a spigot in the middle
[15:10:45] <archivist> this was a sized with top clamp http://www.collection.archivist.info/archive/DJCPD/PD/2008/2008_10_07_cnc_Racing_gears/p1010069.jpg
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[15:22:29] <PetefromTn> What is that thing?
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[15:43:59] <archivist> holds these gears during machining http://www.collection.archivist.info/archive/DJCPD/PD/2008/2008_10_07_cnc_Racing_gears/p1010080.jpg
[15:48:37] <PetefromTn> OOh those are pretty!! RC stuff?
[15:49:23] <archivist> they were/are using the RC servos for a racing motorbike throttle
[15:50:00] <archivist> they were breaking the spastic gear so we made brass ones
[15:50:20] <PetefromTn> Anyone else have a problem wtih windows media player where when you open it you have two of every song loaded in there? I found a way to remove them online in a discussion about it on some tech help site but even tho it removed them every time I power down the computer and restart it they are there again>
[15:50:56] <archivist> format and insert linux
[15:50:56] <PetefromTn> They appear aluminum in that photo.
[15:51:13] <PetefromTn> thats coming actually LOL I want to do a dual boot.
[15:51:25] <archivist> you seem colour deficient then
[15:51:59] <PetefromTn> maybe it is the blue background but I have perfect color vision LOL
[15:52:09] <PetefromTn> Or perhaps it is my monitor settings.
[15:52:45] <archivist> note the brass is freshly machined too, yes it looks a bit pale here too
[15:52:59] <PetefromTn> It has something to do with the WMP network service from what I can tell.
[15:53:27] <PetefromTn> Nice work man..they look great.
[15:55:23] <archivist> there were for the new Norton circa 2008 http://en.wikipedia.org/wiki/Norton_Motorcycle_Company
[15:57:34] <archivist> I think boss at the time charged a bit much, there was never any follow up work
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[16:01:08] <PetefromTn> Oh they are for a Norton Motorcycle? I thought you meant an RC bike or something...
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[16:04:53] <archivist> yes the throttle on the racer
[16:05:10] <ChuangTzu> Jymmm: clutches
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[16:06:22] <PetefromTn> sounds like fun.
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[16:07:13] <archivist> trouble being just a subcontract bit player one never knows how well it worked or not
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[17:26:59] <plasma_ger> hi folks
[17:27:24] <plasma_ger> its ichgucklive on the plasma setup at 5i25-7i76
[17:29:15] <plasma_ger> pcw_home: ?
[17:30:03] <plasma_ger> PetefromTn: are you one
[17:30:25] <PetefromTn> am I one what?
[17:31:01] <plasma_ger> hi you got a 7i77 do i need to powerup Vfield to config wit ptepconf
[17:31:16] <plasma_ger> pncconf
[17:33:51] <pcw_home> probably (though I'm not an expert with pncconf)
[17:34:51] <Tom_itx> PetefromTn if you machine softjaws clamp something between them when you mill them just enough so that when they're clamped it fits the part and is tight
[17:35:19] <plasma_ger> pcw_home: the "broken" 7i76 and 5i25 have finalky arrived here im now getting the system reinstalled and we will see
[17:35:34] <pcw_home> No I/O (other than stepgens and the spindle encoder) will be available as HAL pins
[17:35:35] <Tom_itx> i would probably hold that part on a flat sacrificial plate and use clamps personally
[17:35:51] <pcw_home> without field power
[17:35:52] <plasma_ger> pcw_home: the 5i25 led flashed for 5ms i guess its all alright
[17:36:28] <plasma_ger> ok
[17:36:36] <PetefromTn> Tom_itx: I plan to machine the top face down to around .5" on the OD and then machine a pocket into sacrificial jaws to accept the machined face. Then I will machine the other side. Finally insert it into the lathe for cleanup.
[17:37:07] <PetefromTn> plasma_ger: not sure what you are asking here man.
[17:37:39] <plasma_ger> ok
[17:38:21] <plasma_ger> someone knowes what the force axis to maximize option is in pncconf gui axis config window
[17:38:30] <Tom_itx> for example, i cut that pattern in the softjaws but held them open slightly: http://tom-itx.dyndns.org:81/~webpage/cnc/P2.jpg
[17:39:27] <Tom_itx> http://tom-itx.dyndns.org:81/~webpage/cnc/jaws.jpg
[17:39:33] <Tom_itx> that shows both P2 and P3
[17:39:43] <Tom_itx> in the jaws
[17:41:51] <PetefromTn> Okay you are suggesting using a three jaw mounted in the mill to accomplish the same thing then?
[17:42:03] <Tom_itx> not 3 jaws
[17:42:19] <Tom_itx> if i were gonna do the whole job in a mill i'd bolt it to a flat plate
[17:42:26] <PetefromTn> My stock is square profile tho so I need to machine the first op in the vise to get the round OD as well as remove the features.
[17:42:28] <Tom_itx> and move clamps with op stops etc
[17:42:43] <Tom_itx> or start with round stock
[17:42:54] <Tom_itx> you don't have to
[17:43:09] <Tom_itx> you can profile it while bolting in one of the inner holes
[17:43:41] <Tom_itx> there are lots of ways to approach it
[17:43:53] <PetefromTn> I don't want to be bolting and unbolting here which is why I chose to use the sacrificial jaws in the vise but your idea has merit. I MAY actually bolt my three jaw down there and set a fixture offset to do the second op in the chuck in the mil.
[17:43:56] <Tom_itx> whatever works best for your given tooling
[17:45:12] <PetefromTn> I don't have two vises in the machine yet or I would just use both in two ops. Ideallly I would have the part machined after the second op with only finish work and polishing in the lathe. followed by deburring of the holes. That would get me where I need to be I think.
[17:45:19] <PetefromTn> Thanks for the suggestions man.
[17:46:05] <Tom_itx> if you have alot to run, prove the part with one then run all one op at once before going to P2 P3 etc
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[17:50:38] <PetefromTn> yeah I know not got a lot maybe three but there MIGHT be more after I get these done and folks see how pretty it is LOL
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[17:58:54] <Jymmm> ChuangTzu: thanks
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[18:04:27] <plasma_ger> pcw_home: i think the stepgen2 is broken can i messure it with a scope if it triggers
[18:05:52] <pcw_home> you can just set it to GPIO and see if you can change the output state with setp
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[18:06:58] <pcw_home> num_stepgens=0 in the config line
[18:08:33] <plasma_ger> X and Y are running so 0-1 is ok
[18:09:26] <plasma_ger> num_stepgens=5
[18:14:06] <pcw_home> if you set num_stepgens=0 (or 2) you can
[18:14:08] <pcw_home> setp hm2_5i25.0.gpio.004.is_output true
[18:14:09] <pcw_home> setp hm2_5i25.0.gpio.005.is_output true
[18:14:11] <pcw_home> and the manually set or clear the I/O pins for stepgen 2:
[18:14:12] <pcw_home> setp hm2_5i25.0.gpio.004.out true
[18:14:14] <pcw_home> setp hm2_5i25.0.gpio.004.out false
[18:14:15] <pcw_home> setp hm2_5i25.0.gpio.005.out true
[18:14:17] <pcw_home> setp hm2_5i25.0.gpio.005.out false
[18:15:26] <pcw_home> This will test the 7I76/5I25 step and dir output path for stepgen 2 (GPIO4 is dir2 GPIO5 is step2)
[18:15:50] <plasma_ger> ok
[18:15:59] <plasma_ger> scope says there are ticks
[18:16:12] <plasma_ger> not rectencular but its ticking
[18:18:37] <pcw_home> should be 5V
[18:19:11] <pcw_home> and + and - pins should be inverted copies of same signal
[18:21:08] <plasma_ger> i see signals so i think its ok let me check the X
[18:23:54] <plasma_ger> pcw_home: scope is clear on alll signals so i gess its the driver
[18:25:08] <pcw_home> driver?
[18:27:20] <pcw_home> are you looking at 5i25 pins or 7I76 pins?
[18:27:39] <plasma_ger> the Leadshine let me check this
[18:28:37] <plasma_ger> its the leadshine
[18:30:09] <pcw_home> step timing OK? (enough margin)
[18:31:51] <plasma_ger> yes
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[18:32:23] <andypugh> I don't think this is what he thinks it is: http://www.ebay.co.uk/itm/Silver-Tone-Black-12-x-12mm-Inner-Hole-Collect-Chuck-CNC-Milling-Lathe-Tool-/121205646148
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[18:33:40] <pcw_home> I've seen some people set step times to drive minimums, dont do that :-)
[18:35:27] <pcw_home> looks like a chuck drive pinion (it thats the correct term)
[18:35:46] <andypugh> Yes, I am almost certain that is what it is.
[18:36:05] <andypugh> (From a 3-jaw lathe chuck)
[18:36:24] <plasma_ger> pcw_home: its not on your stuff
[18:36:40] <plasma_ger> if i change X to the Z(stepgen2) it moves
[18:36:54] <plasma_ger> so its the M542
[18:37:02] <plasma_ger> the M880 i got works
[18:37:52] <plasma_ger> ok by thanks for the help
[18:38:09] <pcw_home> Try a longer step time...
[18:38:24] <plasma_ger> bye i will try to open the m542 and see what is broken
[18:38:37] <plasma_ger> its the same steppers
[18:38:49] <plasma_ger> so the same timing shout work also
[18:39:04] <plasma_ger> the driver enables
[18:39:14] <plasma_ger> but the signals not getting thru
[18:39:26] <pcw_home> if its on the edge, maybe, maybe not
[18:39:36] <plasma_ger> stepper got force so the driving stage may work
[18:39:59] <plasma_ger> it is 2500 at 15oo in the datasheet
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[18:41:03] <pcw_home> step time is 2500?
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[18:42:25] <pcw_home> you should never set the step time to the drives minimum (this is just on the edge of not working)
[18:43:15] <plasma_ger> i know its 1000mor
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[18:47:44] <plasma_ger> D
[18:47:46] <plasma_ger> e
[18:47:48] <plasma_ger> f
[18:47:49] <plasma_ger> a
[18:47:51] <plasma_ger> u
[18:47:52] <plasma_ger> lt
[18:47:54] <plasma_ger> se
[18:47:55] <plasma_ger> tti
[18:47:57] <plasma_ger> n
[18:47:58] <plasma_ger> g
[18:48:00] <plasma_ger> i
[18:48:01] <plasma_ger> s
[18:48:03] <plasma_ger> P
[18:48:05] <plasma_ger> U
[18:48:07] <plasma_ger> L
[18:48:09] <plasma_ger> /DIR
[18:48:10] <plasma_ger> m
[18:48:12] <plasma_ger> od
[18:48:13] <plasma_ger> e
[18:48:15] <plasma_ger> a
[18:48:16] <plasma_ger> nd
[18:48:18] <plasma_ger> up
[18:48:19] <plasma_ger> w
[18:48:21] <plasma_ger> a
[18:48:22] <plasma_ger> r
[18:48:24] <plasma_ger> d
[18:48:25] <plasma_ger> -ri
[18:48:27] <plasma_ger> s
[18:48:29] <plasma_ger> i
[18:48:30] <plasma_ger> n
[18:48:32] <plasma_ger> g
[18:48:33] <plasma_ger> e
[18:48:35] <plasma_ger> d
[18:48:36] <plasma_ger> g
[18:48:38] <plasma_ger> e
[18:48:39] <plasma_ger> ac
[18:48:41] <plasma_ger> ti
[18:48:43] <plasma_ger> v
[18:48:44] <plasma_ger> e
[18:48:46] <plasma_ger> SORRY
[18:48:47] <plasma_ger> pcw_home: defalt is apward risiong edge
[18:54:10] <pcw_home> wow! how did you do that?
[18:58:12] <plasma_ger> ok last check has been stepper OK confirmed
[19:00:20] <plasma_ger> Bye
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[19:01:34] <ReadError> wow
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[19:39:23] <pingufan> Hello, I want to connect a PIC to my cnc mill. The controller will monitor the mill and shall immediately pause the execution of the milling job when the spindle rpm go below a specific value.
[19:40:42] <pingufan> What is better? Simulating a USB keyboard, or simulating a serial port and let linuxCNC talk to it through this serial port? Can LinuxCNC communicate with a serial device?
[19:41:10] <pingufan> For me it is easier to communicate serially.
[19:42:00] <pingufan> This would also cause no interference between normal keyboard input and the microcontroller.
[19:42:31] <Jymmm> Whats the purpose of the PIC ?
[19:44:07] <Jymmm> And why would the spindle drop below a certain RPM; that sounds like cutting too deep/too quickly.
[19:45:00] <Jymmm> you would "normally" adjust your speeds/feeds accordingly in advance to prevent that.
[19:45:05] <pingufan> My mill has a belt drive and a very weak 120 Watts motor. When milling ALU, it happens from time to time that I get a "very special" material. This causes that the spindle stops and the tool breaks (this are 1-2 mm tools only)
[19:45:53] <Jymmm> "very special" ???
[19:46:43] <pingufan> Extremely taughen
[19:46:59] <Jymmm> That sounds like you are using a yugo to move a 20,000lb tractor trailer.
[19:48:06] <Jymmm> You could just put an encoder on your spindle and let linuxcnc read it directly, no uC/PIC needed.
[19:49:07] <pingufan> Anyway, I have my reasons. Can I connect a device serially, watch what it sends, and do things depending on its output?
[19:51:01] <pingufan> I would also like to send a code to the PIC when I switch the spindle on, and another on ewhen I turn the spindle off. To notify the PIC that the spindle-stop is wanted.
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[19:56:46] <pingufan> archivist: are you here?
[19:57:58] <skunkworks> pingufan: this can all be done without a pic using a spindle index/encoder and linuxcnc spindle_at_speed pin.. (and a few various hal componants)
[19:58:43] <pingufan> What does this encoder cost?
[19:59:29] <skunkworks> you could use just an single sensor also - (1 pulse per rev)
[19:59:47] <skunkworks> how where you going to sense spindle rpm with the pic?
[19:59:50] <pingufan> We are talking of 10000-18000 rpm!
[20:00:30] <pingufan> A reflective light barrier and a mark on the spindle
[20:02:04] <pingufan> This is ~250 pulses per second.
[20:02:42] <pingufan> Are the inputs of a parallel port fast enough for that?
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[20:12:37] <skunkworks> depending on the computer you should be able to count 20-40khz
[20:13:20] <pingufan> So a simple reflective sensor could be enough?
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[21:43:45] <MacGalempsy_> afternoon all
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[21:50:21] <PetefromTn> Afternoon Mac.
[21:51:45] <MacGalempsy_> anything exciting going on today pete?
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[21:54:02] <MacGalempsy_> well back to manual reading and conceptualizing. bbl
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[22:03:57] <PetefromTn> just been trying to draw in 3d so I can start thinking and machining in 3d..
[22:04:10] <PetefromTn> How about you>?
[22:05:23] <Tom_itx> PetefromTn what did you model that round part in?
[22:05:33] <PetefromTn> freecad
[22:05:41] <Tom_itx> how long did it take?
[22:05:48] <PetefromTn> TOO DAMN LONG
[22:06:15] <Tom_itx> you don't like it?
[22:06:18] <PetefromTn> it crashes on me often unfortunately but that may be because I am doing things wrong I am new to the 3d thing
[22:06:46] <Tom_itx> doing something wrong in a cad program shouldn't crash it
[22:07:01] <PetefromTn> no actually it is amazing but I am having to learn not only how to draw but also how to keep from losing my info.
[22:07:03] <Tom_itx> it may not produce the desired result
[22:07:26] <PetefromTn> Agreed but it is still in beta so can't complain for the price LOL
[22:08:20] <PetefromTn> Honestly if it can draw that part and it is dimensionally correct when I machine it then it is all I will ever need honestly. SImple 2d stuff I draw and machine in sheetcam.
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[22:53:27] <_DJ_> gn8
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[23:05:52] <andypugh> Finished the toolpost. https://picasaweb.google.com/lh/photo/wINj61niBdZh52a-6ssCg9MTjNZETYmyPJy0liipFm0?feat=directlink
[23:09:02] <kwallace_shop> That looks pretty good.
[23:12:00] <andypugh> It's been an interesting excercise. If I was doing it again I would make a pattern and have a casting made.
[23:12:29] <andypugh> And I wouldn't want to be charging to make them.
[23:15:58] <kwallace_shop> You might be surprised at what some people would pay for a Rivett tool post.
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[23:22:41] <kwallace_shop> Here is an example I happened on today of what some people can afford: http://www.sales.highendpalace.com/536000.jpg
[23:23:27] <PetefromTn> Nice work man...
[23:24:08] <kwallace_shop> http://www.sales.highendpalace.com/143700.jpg
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[23:27:52] <kwallace_shop> andypugh: What's next?
[23:29:43] <andypugh> Ah yes, there is no limit to how much money you can spend on a gramaphone.
[23:32:03] <pcw_home> Well I hope the platter is sapphire and not mere plexiglass
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