#emc | Logs for 2008-09-09

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[01:39:54] <dmess> hi all... what a day.. IMTS is LARGE
[01:40:08] <dareposte> you're up there now?
[01:40:21] <dmess> http://imagebin.org/26061 yes i am..
[01:40:29] <dmess> down there actually for me
[01:41:31] <dmess> its mildly overwhelming... and ive seen all the canadian trade shows
[01:43:47] <dmess> chk out the post prior to the 1 i sent... its THE CATS MEOW
[01:48:59] <jmkasunich> 120 HP!
[01:52:07] <JymmmEMC> SWPadnos: ping
[01:52:13] <SWPadnos> poingggg
[02:03:38] <jmkasunich> dmess: you run into any of the EMC guys?
[02:51:11] <dmess> any one home
[02:51:27] <SWPadnos> apparently not
[02:51:47] <SWPadnos> Occupant moved, left no forwarding address
[02:52:07] <dmess> not a good sign
[02:54:41] <dmess> is he gone to Chicago??
[02:54:51] <SWPadnos> I saw one of these in a car window today: http://www.sharenow.com/base/content/12605/
[03:06:44] <Vahue> what do people think regarding Xylotex VS HobbyCNC
[03:14:54] <cradek> there has been a lot of conversation lately about a bug in the hobbycnc board that requires a hardware fix for it to work properly. see the emc-users list archive.
[03:14:55] <skunkworks> Vahue: look on cnczone.com. there are a lot of threads on both of them
[03:15:16] <skunkworks> cradek: yikes
[03:15:21] <Vahue> i probably wouldve gone hobby but xylotex comes with a power supply
[03:15:31] <Vahue> also higher torque motors for free
[03:19:20] <cradek> http://thread.gmane.org/gmane.linux.distributions.emc.user/8921/focus=8929
[04:27:26] <JymmmEMC> Vahue: Use neither, spend the extra to get REAL drives
[04:41:27] <Vahue> where from
[04:41:50] <Vahue> keep in mind i dont want to do super hardcore stuff, just simple wood + pbc
[04:52:13] <Jym> Vahue:
[04:52:28] <Jym> Vahue: that's exactly what I'm talking about
[04:54:11] <Vahue> so where can i find more about them
[04:54:18] <Jym> about what?
[04:54:27] <Vahue> these better motors
[04:54:48] <Jym> no idea what motors you have, but I was tlaking about the drives
[04:55:03] <Vahue> oh ok
[04:55:10] <Vahue> like gecko?
[04:55:25] <Jym> gecko, parker, etc correct
[04:55:35] <Vahue> yeah theyre really expensive
[04:56:00] <JymmmEMC> I have xylotex, I wish I never bought them
[04:56:03] <JymmmEMC> it
[04:56:15] <Vahue> hm why
[04:57:08] <JymmmEMC> underpowered, have a known heating issue, and no stall compensation
[04:57:48] <Vahue> since im in australia it makes it alot harder to get things also
[04:58:17] <JymmmEMC> and while I can't prove it, I bellieve the specs for his motors may not be all their cracked up to be.
[05:05:39] <Vahue> what about hobbycnc motors
[05:06:04] <Jym> no idea, but iirc those are not bipolar motors
[05:27:38] <dmess> who whatnt a head's up on IMTS
[05:27:53] <dmess> want's
[05:29:22] <dmess> there's 100 million dollars of equipment in 1 place.. all for the talking..
[05:29:37] <Vahue> huh?
[05:31:04] <dmess> you could build an op for 1 M or 10 M to make the same part
[05:31:59] <dmess> Vahue.... where are you located??
[05:32:51] <Vahue> brisbane, australia
[05:33:30] <dmess> http://imagebin.org/26060 check this out
[05:34:19] <Vahue> wow
[05:34:24] <dmess> i currently have 2 of the m65's in our house... and they work
[05:35:14] <dmess> we have a bar that we call a BMW 400 series.. bimmer
[05:35:45] <dmess> has the bimmer run?? is the call
[05:36:17] <dmess> in our house..
[07:55:51] <micges> good mornig
[07:55:57] <micges> morning
[08:16:55] <archivist_ub> Vahue, http://www.arceurotrade.co.uk/Catalogue/Stepper-Motors another supplier
[08:17:49] <Vahue> was there one posted in the last ~1hr becuase my pc was locked up :X
[08:17:57] <Vahue> thanks for helping me
[08:21:05] <archivist_ub> I use the 180's on me X and Y and the 220 on my Z
[08:22:02] <archivist_ub> I have seen the drives under another name somewhere but cant remember where
[08:22:26] <pjm_> i use one of the 220N's on my Z also and it works like a charm
[08:22:37] <pjm_> from that same suppler in fact, they are a good price
[08:49:53] <Vahue> delivery to australia is 100 pounds :(
[09:02:08] <archivist_ub> nasty
[09:05:19] <Vahue> i think ill go with xylotex for now
[09:05:39] <Vahue> simply because its an all in one package (i WISH it was a kit, i like soldering)
[09:06:40] <Vahue> im building a jgro first, then after I earn some more money I can build joes using a gecko drive and sell this one
[12:52:34] <skunkworks_> http://www.britishideas.com/2008/07/18/emc2-and-cambam-tab-test/
[12:52:38] <skunkworks_> I love axis
[13:05:20] <archivist_ub> hmm another brit I wonder where he is
[13:24:37] <jepler> my nuts came yesterday
[13:30:37] <skunkworks_> cool
[13:30:49] <skunkworks_> the dumpster cnc ones?
[13:36:33] <jepler> yeah
[13:37:54] <skunkworks_> Your machine will be very nice for making circuit boards.
[13:38:37] <jepler> yeah, I expect this will fix my backlash problem .. though software backlash compensation was doing a pretty good job
[13:39:39] <jepler> I wonder what it'll do to my top speed -- it'll be 16TPI vs the 20 I have now, but it feels like there's a lot more friction turning the nut on the screw by hand
[13:42:16] <fenn> more friction on the acme nut?
[13:43:59] <jepler> yeah
[13:50:24] <cradek> good morning
[13:50:51] <jepler> hi cradek
[13:53:47] <jepler> run into anything interesting at the show?
[13:54:35] <cradek> interesting stuff to see, but nothing 'new and different'
[13:55:20] <cradek> there was a lathe with 10' (?) swing. they had the spindle running at 1rpm which would be a nice useful speed on it
[13:56:16] <jepler> gee, thinking of upgrading from your HNC already?
[13:56:42] <cradek> nope, it's a little bigger than my shop
[13:57:36] <skunkworks_> heh
[13:58:25] <alex_joni> 'lo
[13:58:28] <cradek> hi
[13:58:38] <alex_joni> hi BigJohnT
[13:58:56] <BigJohnT> hi alex_joni
[13:59:16] <BigJohnT> what's going on today
[13:59:27] <alex_joni> s2d2
[14:00:05] <jepler> issy: to get help with emc, ask in the channel, not by sending private messages. State your question and if someone is willing and able to respond, he will.
[14:01:32] <BigJohnT> I just popped in the shop to check e-mail then I'm heading out
[14:03:43] <BigJohnT> morning jepler I see your off to a good start
[14:05:11] <BigJohnT> hey alex_joni I got my water pan done for the plasma cutter
[14:05:20] <BigJohnT> need to get some pictures
[14:05:22] <alex_joni> oh, you're gonna cut in water?
[14:05:35] <BigJohnT> over water
[14:05:43] <alex_joni> not submerged?
[14:05:47] <BigJohnT> no
[14:05:52] <alex_joni> why not?
[14:06:24] <BigJohnT> not sure my torch is designed to cut under water and the design would have to be changed
[14:07:05] <BigJohnT> in my tests the water cut a huge amount of dust and smoke out even 4" below the torch
[14:07:31] <alex_joni> yeah, it usually does
[14:07:59] <BigJohnT> so now it is 2" below the material and the whole thing remains portable :)
[14:08:17] <alex_joni> cool
[14:08:24] <alex_joni> as long as you remember to empty the pan
[14:09:20] <BigJohnT> I got some sodium nitrite and a fungicide for the water and that works well
[14:10:33] <BigJohnT> well I'm off to the big city to find an old fart thermostat for my Dad's house
[14:11:01] <Jymm> digital all the way!
[14:11:15] <Jymm> saves juice too
[14:11:29] <BigJohnT> yes but it has to have two buttons only for old farts hotter and colder
[14:11:44] <Jymm> some actually do, up and down
[14:11:48] <BigJohnT> any more than that and it is too complicated
[14:12:11] <BigJohnT> I saw some online that fit the bill for a heat pump with aux heat
[14:12:11] <Jymm> (the timer controlers are hiden behind the door)
[14:12:59] <BigJohnT> talk to you guys later
[14:13:10] <Jymm> you only have to hit the controls if you are awake/home/asleep at unusual times
[14:13:12] <Jymm> hasta
[14:24:42] <moussar> Hi, I need some help here with PP on RHEL 4.6. Installed PP 5.1.0, added license all fine. Starting PowerPath service returns that it needs RHEL 4. where can I look for solution?
[14:25:29] <archivist_ub> methinks this is the wrong emc for you moussar this is for a machine controller software
[14:25:37] <moussar> I've seen the rc script starts a script called "enable", does this return the wrong version?
[14:26:13] <moussar> archivist_ub: OK, may be. But this has been submitted with the server on CD
[14:28:04] <archivist_ub> this emc has no connection with emc.com
[14:28:40] <archivist_ub> this place is for CNC control software called EMC2
[14:29:19] <archivist_ub> its an opensource application you want http://www.emc.com/products/family/powerpath-family.htm
[14:29:29] <moussar> archivist_ub: oh, sorry. I feel like an idiot
[14:29:40] <archivist_ub> dont worry
[14:30:18] <archivist_ub> * archivist_ub googled to find out what powerpath was
[14:30:29] <moussar> :)
[14:31:04] <moussar> I just thought linux, freenode, emc and it had to be good. but next time i'll read the topics
[14:31:33] <jepler> come back later when you've decided to get into the cnc business or hobby
[14:31:41] <skunkworks_> :)
[14:32:31] <moussar> :)
[16:24:01] <Jymm> SWPadnos: ping?
[16:25:57] <Jymm> SWPadnos: Check your junk mail
[16:31:19] <issy> is somebody online?
[16:33:06] <SWPadnos> jymm, thanks
[16:33:39] <issy> Hi ,I need little help for the emc
[16:34:59] <jepler> Don't Ask to Ask, Just Ask
[16:38:44] <issy> ok,I have made new GUY from scrach for the emc , but I need to know haw to implement the second interpreter for the grafic preview , as is made in the axis
[16:39:23] <issy> if somebody want to test it is welcome. It works in windows and in linux
[16:40:54] <jepler> you may find it helpful to look at gcodemodule.cc in src/emc/rs274ngc -- it exposes the necessary APIs to Python.
[16:41:23] <jepler> the interpreter works by making calls to APIs called the "canonical machining functions" for each action taken by the gcode being interpreted
[16:41:42] <jepler> so for instance when a G1 move is interpreted, there is a call to STRAIGHT_FEED with 9 values
[16:41:51] <issy> yes , i see , but haw is implemented in the axis , I am verry god with the C , but the snake is not my power
[16:43:12] <issy> the rs274/ is the base interpreter of the emc machine ,for the visualisation of the path in the axis there is anothe. this is interesting for me.
[16:43:37] <jepler> another thing to look at is the files in src/emc/canterp -- this program (compiled to the executable name "rs274") prints the "canon calls" for a given gcode file
[16:43:59] <issy> I will look it.
[16:44:17] <issy> do you want to see my GUI for the emc?
[16:44:31] <jepler> axis uses opengl to produce a 3d display. For instance, it records all the moves made by STRAIGHT_FEED calls as lines with XYZ starting and ending points. then each time the display needs to be rendered, that line is drawn using OpenGL calls such as glBegin(GL_LINES), glPoint3d, and so on
[16:44:38] <jepler> I think alex_joni showed me some screenshots
[16:44:46] <issy> yes. right
[16:45:04] <jepler> opengl is a very good API for 3d rendering which is portable to all major operating systems
[16:45:06] <issy> I want to finish it as soon as possible.
[16:45:47] <issy> in my sistem is automaticaly swithcing to opengl , if available.
[16:46:31] <jepler> er -- I named the wrong directory earlier. forget about src/emc/canterp. the directory is src/emc/sai
[16:46:48] <issy> yes. thanks.
[16:47:00] <issy> with the c I have no problems
[16:47:18] <issy> STAND ALONE INTERPRETER
[16:49:10] <issy> the gui is designed to work directly with the X ,so there is no need even to install the gnome
[16:50:01] <issy> if somebody want to check it , is welcome.
[16:50:11] <Jymm> SWPadnos: np =)
[16:51:04] <jepler> bbl, it's lunchtime here
[16:51:15] <issy> :)
[17:09:53] <SWPadnos> oh good. the monsoon has stopped
[17:18:30] <Jymm> SWPadnos: can't hav ethat, I'll send more your way
[17:18:44] <SWPadnos> ok, no problem
[17:18:58] <SWPadnos> the more rain we get the less likely it is that I'll be forced to mow the lawn
[17:22:26] <archivist_ub> we are having a monsoon season in the uk this year as well
[17:40:39] <issy> can somebody help me with the SAI for the USER INTERFACE?
[17:40:57] <alex_joni> issy: can you be a bit more specific?
[17:41:34] <issy> STAND ALONE INTERPRETTER THAT IS USED IN THE AXIS GUI TO PREVIEW THE TOOLPATH.
[17:41:37] <issy> Thanks.
[18:14:23] <hielk1> ´╗┐Has anyone here used blender to emc2 ?
[18:14:45] <jepler> move
[18:14:55] <jepler> oops
[18:14:59] <jepler> no, I'm not familiar with blender
[18:17:18] <hielk1> okay thanks jepler
[18:22:24] <Jymm> SWPadnos: Got Ark?
[18:22:56] <Jymm> SWPadnos: ...and 2 x 2 x 2 x 2 x 2.......
[18:27:44] <Jymm> SWPadnos: http://www.arduino.cc/
[19:03:44] <tomp> 2d polyline & 3dmesh from dxf to gcode (in python & untested ) http://web.media.mit.edu/~neilg/fab/dist/cam.py
[19:08:50] <fenn_> fenn_ is now known as fenn
[19:38:12] <alex_joni> tomp: is that new?
[19:50:06] <billy_kid2> hello
[19:55:15] <fenn> interesting combination of vacuum and t-slots on issy's machine: http://imagebin.org/26030
[19:56:28] <issy> the table is made of aluminium extruded tubes , taped and driled
[19:57:30] <archivist_ub> plastics/font panel work?
[19:57:57] <issy> extruded aluminium
[19:58:25] <archivist_ub> what you are cutting?
[19:58:50] <issy> I am manufacturing these machine , not using them
[19:59:06] <archivist_ub> ah ok
[20:03:00] <billy_kid2> someone can help me?
[20:04:05] <jepler> just ask your question instead of asking to ask your question
[20:04:45] <billy_kid2> is possible display velocity in pyvcp?
[20:04:53] <billy_kid2> feed
[20:05:03] <billy_kid2> spindle ok
[20:06:38] <jepler> it appears the number displayed in axis as velocity is not directly available in hal. however, you can compute it using the hal "ddt" and "hypot" components. there is an example of this in sample-configs/sim/core_sim.hal
[20:08:00] <billy_kid2> i have connect current-vel
[20:08:24] <billy_kid2> to pyvcp
[20:08:37] <billy_kid2> but no counts appear
[20:11:01] <billy_kid2> anyways is displayed in axis
[20:11:24] <billy_kid2> the feed axis
[20:11:45] <jepler> 'current-vel' is the name of a signal you used in your hal file? what else is it connected to that you expect it to be given the desired value?
[20:13:39] <billy_kid2> current vel is abridged
[20:14:32] <billy_kid2> name is not exact
[20:15:24] <billy_kid2> now i turn on emc2 pc
[20:15:58] <billy_kid2> and see the exact signal
[20:19:45] <billy_kid2> parameter
[20:19:56] <billy_kid2> motion.current-vel
[20:20:17] <billy_kid2> not signal
[20:24:53] <jepler> parameters can't be connected to pins
[20:25:27] <jepler> you will get an error in your hal script when you try to do that
[20:25:29] <jepler> similar to this one:
[20:25:29] <jepler> halcmd: net example motion.current-vel => pyvcp.float
[20:25:29] <jepler> <stdin>:0: pin 'motion.current-vel' does not exist
[20:25:48] <jepler> like I said earlier, the number displayed in axis as velocity is not directly available in hal.
[20:26:01] <jepler> you can compute it using "ddt" and "hypot" components from the axis positions
[20:26:02] <billy_kid2> yes
[20:26:09] <jepler> there is an example of this in sim/core_sim.hal
[20:26:23] <billy_kid2> i have see this file
[20:26:36] <billy_kid2> thanks
[20:26:37] <jepler> presently that's the way to get current velocity as a pin or signal in hal
[20:27:02] <billy_kid2> ok
[21:33:59] <Gromit> I am trying to convert my lathe to run from EMC, It is currently configured for Mach3. Can EMC do threading from a single spindle index pulse or do I need a quadrature encoder on the spindle?
[21:34:45] <issy> look at www.hedss.com. cn
[21:34:59] <alex_joni> Gromit: if you go with a released emc2 version (last one is 2.2.6) then it needs a quadrature encoder
[21:35:20] <alex_joni> the next version (2.3.x) or the current development version can do threading with a single pulse
[21:35:28] <issy> for the spindle is ok a single pulse per revolution at chanel
[21:35:36] <alex_joni> how well it does that.. that's another story
[21:35:58] <issy> for lathe , not so , for miling is ok.
[21:36:48] <alex_joni> that page contains a trojan (my antivir complains)
[21:37:20] <issy> alex , on our mazak this is done by interpolating 3 pulses 120 degree one from other. is working fine
[21:38:01] <issy> it is not trojan , is the aadon for chating with them , dont worry
[21:38:03] <Vq^> alex_joni: don't listen to that sissy :o)
[21:38:26] <issy> i am using encoders from them
[21:38:48] <Gromit> OK thanks. I currently have 2.2.6. I guess I'll have to wait. I can get 4 pulses per rev with one longer than the others if that helps? (That is how the Timing input works on Mach)
[21:39:13] <issy> :)
[21:39:26] <alex_joni> Gromit: try it with one pulse.. you might get acceptable results
[21:39:40] <alex_joni> it all depends how constant your spindle speed is (e.g. how big cuts you take)
[21:39:59] <alex_joni> Vq^: on that note... good night all
[21:40:10] <Gromit> Thanks for your help
[21:53:13] <tomp> alex: no, but someone asked how to convert polyline to gcode
[21:54:32] <tomp> hmm wonder why this chat suddenly showed me last several hours, it was blanks since 2pm
[22:18:59] <skunkworks> issy's table looks like it has sheet-rock on top of it.