#linuxcnc | Logs for 2013-02-15

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[00:00:05] <Valen> is that totally excessive?
[00:01:05] <andypugh> Check with DMM though, don't take my word for it.
[00:01:05] <andypugh> Valen: No, 3G sounds reasonable.
[00:01:05] <andypugh> I made a 500G machine once :-)
[00:01:29] <Valen> so its not an insane acceleration?
[00:01:38] <Valen> its hitting top speed in like .0something of a second
[00:04:32] <Valen> 500G of acceleration? thats a low powered tank gun
[00:04:58] <andypugh> It did tend to destroy itself. It was for crash-simulation.
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[00:08:53] <Tom_itx> andypugh what program did you use to create this?
[00:09:03] <andypugh> Inventor
[00:09:30] <Tom_itx> you don't have acad?
[00:09:33] <Valen> so the current plan is a pair of those 750's driving a ~60kg gantry
[00:09:42] <Valen> with 1500mm long screws
[00:09:51] <Valen> 20mm with a 10mm lead
[00:10:27] <andypugh> Inventor is by AutoDesk...
[00:10:33] <Tom_itx> i know
[00:10:48] <Tom_itx> i can get it into acad or solidworks but can't get it into the cam package
[00:10:49] <Valen> inventor is the big boy version of acad isnt it?
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[00:14:37] <andypugh> Tom_itx: Thanks for wasting your evening on me. :-)
[00:14:38] <JT-Shop> what RPM do you run a single flute counter sink?
[00:15:17] <Tom_itx> andypugh i can usually find a way but this isn't cooperating
[00:15:43] <andypugh> I am having a very similar experience with Inkscape / gcodetools
[00:15:54] <Tom_itx> it's writing something in the header that the translator doesn't like
[00:15:57] <andypugh> It _looks_ like it ought to work, but doesn't/
[00:16:16] <Tom_itx> i've tried 3 different versions of translators
[00:16:40] <Tom_itx> all end up the same
[00:16:40] <Tom_itx> save it on a numbered layer once and try that
[00:16:51] <Tom_itx> my cam uses numbered layers
[00:17:00] <Tom_itx> 99 is usually a good one
[00:17:10] <Tom_itx> i doubt that fixes anything but...
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[00:21:49] <Tom_itx> k i got the 3d iges in
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[00:22:03] <Tom_itx> the mill program now to see if i can save it to 2d
[00:22:13] <andypugh> I can do SVG?
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[00:22:26] <Tom_itx> i don't think that'll help
[00:22:39] <Tom_itx> send me the other part as iges and i'll work on it tonight
[00:22:40] <andypugh> I was looking at saving DXF from Inkscape, but need pstoedit installed
[00:22:51] <Tom_itx> i may be able to do something with this i dunno for sure
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[00:26:23] <Tom_itx> now if i can slice it at x0 y0 and save it as 2d...
[00:28:17] <Tom_itx> i could generate my own polyline from the model i suppose
[00:29:17] <Jymmm> I want to toss two SS water bottles that have coatings on them into the coals. The last time I did this after a few days rust appeared on the inside of the bottles. Was that due to defects in the pervious bottles, or the "baptism by fire"?
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[00:30:41] <Tom_itx> andypugh, i think you sent me outer.igs, send inner.igs before you sign off and i think i can work with that
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[00:36:38] <Valen> heres a question,
[00:36:59] <Valen> I make a GEDA out of kicad, and want to make a solder mask, any suggestions?
[00:37:37] <Valen> Jymmm: look up stainless corrosion properties vs temperature
[00:38:01] <Valen> most stainless will start rusting in the presence of water over ~60C
[00:38:32] <Valen> if you are burning a carbon containing coating it will likely affect the surface chemistry
[00:38:49] <Valen> andypugh: so do you think the 750s are total overkill?
[00:39:02] <Valen> basically are we wasting $800 getting them over the keligs with half the torque
[00:39:03] <andypugh> What size machine?
[00:39:10] <Valen> 1200x1200mm work area
[00:39:17] <Valen> 60kg gantry
[00:39:51] <andypugh> I would expect to be using decent-sized motors with that.
[00:40:05] <Tom_itx> ok i at least got a polyline from it
[00:40:06] <andypugh> Which Kelings (and drives?)
[00:40:07] <Valen> yeah, but 400w is decent too ;->
[00:40:18] <Valen> geckos and the biggest size 34's
[00:40:31] <Valen> same torque at 40A but geckos only make 20A
[00:40:50] <andypugh> Stepper?
[00:40:54] <Valen> servo
[00:41:21] <andypugh> Have you seen http://machmotion.com/cnc-products/drives-motors/teco-servo-drives-and-motors.html ?
[00:41:31] <Valen> probably not lol
[00:42:03] <Valen> they look to be the same pice as the dmms for half the wattage?
[00:42:56] <Valen> we were looking to gear it ~2:1 as well
[00:43:04] <PCW> But they have abetter looking Chinese case
[00:43:11] <Valen> that much is true
[00:43:27] <Valen> PCW: I was thinking about using the mesa drives rather than the dmm ones
[00:43:37] <andypugh> DO you have a link to the Keling motors?
[00:43:41] <Valen> but I'm a bit worried about compatability
[00:43:48] <Valen> http://www.automationtechnologiesinc.com/products-page/nema-34-dc-servo-motor/nema34-1125ozin-dual-shaft-servo-motor
[00:44:01] <Tom_itx> ok andypugh i got it into the lathe package
[00:44:16] <andypugh> Ah, DC brushed motor?
[00:44:19] <Valen> also is hooking the mesa bigass brushless drivers to 240V mains supported?
[00:44:21] <Valen> yeah
[00:44:33] <andypugh> Needs an encoder...
[00:44:44] <Valen> all up it still winds up cheaper
[00:44:48] <Tom_itx> i think the workplane is flipped though
[00:45:08] <andypugh> And sold out...
[00:45:14] <Valen> we aren't in a rush
[00:45:22] <Tom_itx> andypugh, z axis on the lathe should be right to left correct?
[00:45:25] <andypugh> http://www.automationtechnologiesinc.com/products-page/nema34/kl34bls-series-12 is prettier
[00:45:34] <andypugh> Tom_itx: Aye
[00:45:46] <Tom_itx> x is vertical...
[00:45:52] <andypugh> Indeed
[00:45:54] <Valen> how do you think using the mesa brushless vs one of these analog interface drivers would work?
[00:46:02] <Tom_itx> now to figure out how to flip it
[00:46:24] <Valen> I'm a little concerned about the servo rate
[00:46:45] <andypugh> It's a valid concern
[00:46:59] <Valen> also, how does the 8i23 handle current control?
[00:47:08] <Valen> i mean adding more power when its pushing harder
[00:47:21] <andypugh> I am using 750W and 8i20 on my machine, but it's some way from being complete enough to judge how well it is going to work.
[00:47:34] <Valen> which 750w?
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[00:47:48] <Jymmm> I want to toss two SS water bottles that have coatings on them into the coals. The last time I did this after a few days rust appeared on the inside of the bottles. Was that due to defects in the pervious bottles, or the "baptism by fire"?
[00:47:50] <andypugh> Random eBay ones. (Lenze, with resolvers)
[00:48:03] <Valen> (11:37:36) Valen: Jymmm: look up stainless corrosion properties vs temperature
[00:48:03] <Valen> (11:38:00) Valen: most stainless will start rusting in the presence of water over ~60C
[00:48:04] <Valen> (11:38:32) Valen: if you are burning a carbon containing coating it will likely affect the surface chemistry
[00:48:42] <Jymmm> Valen: But the coating is on the OUTSIDE, not inside where the rust was previously
[00:48:51] <Valen> we looked at the rotating nuts, but it seems to be too much hassle
[00:49:03] <Valen> (11:38:00) Valen: most stainless will start rusting in the presence of water over ~60C
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[00:49:08] <andypugh> Valen: But 8i20 is high-voltage. I don't think they even wake up properly below 50V
[00:49:17] <Valen> input or output?
[00:49:26] <andypugh> DC input
[00:49:29] <Jymmm> Valen: No water was ever added to the botlles post baptism
[00:49:31] <andypugh> (You still need a PSU)
[00:49:32] <Valen> I was thinking of badboy rectifying mains and slapping it into it
[00:49:49] <Valen> (240v mains here)
[00:49:50] <andypugh> That is what I am doing. But then you need a motor rated for the voltage
[00:50:18] <Valen> presumably the PWM could be set to limit it to around the motors max voltage?
[00:50:32] <Jymmm> Valen: any other thoughts?
[00:50:43] <Valen> made in china crap?
[00:50:53] <Jymmm> Valen: I beleve so
[00:51:06] <Jymmm> Valen: Sub-Zero brand
[00:51:07] <Valen> its stainless steel brand, not actually stainless
[00:51:36] <Valen> any iron contamination inside, dirt, dust whatever would cause it to rust at elevated temperatures
[00:51:57] <Jymmm> Valen: BRAND NEW
[00:52:00] <andypugh> Valen: Keling have a brushless 660W motor + matching drive for $169 + $189.
[00:52:47] <Valen> must admit i haven't looked there
[00:52:52] <Jymmm> Valen: The was previous http://i43.tinypic.com/2qxb4g8.jpg
[00:53:04] <Jymmm> Valen: Inside the bottom of the bottle
[00:53:15] <andypugh> Valen: I mean http://www.automationtechnologiesinc.com/products-page/nema34
[00:53:36] <Valen> that looks pretty normal for hot stainless
[00:53:43] <Valen> stainless headers on an exhaust look like that
[00:53:47] <andypugh> (encoders required)
[00:54:03] <Jymmm> Valen: so too much heat all at once?
[00:54:28] <Valen> too hot in the presence of oxygen and carbon
[00:54:39] <Jymmm> Valen: fter the coating is removed, I want to be able to boil water in them.
[00:54:39] <Valen> it'll remove any work hardening too
[00:55:07] <Valen> andypugh: thats going to need one hell of a 48vdc power supply
[00:55:17] <Jymmm> Valen: I dont see this happening on SS cookware.
[00:55:20] <andypugh> I think they sell them too
[00:55:30] <Valen> you don't heat your cookware to 700C
[00:55:52] <Jymmm> Valen: Yeah I do, I toss it on/near the coals
[00:56:06] <Valen> if you have food in it it won't get that hot
[00:56:31] <Jymmm> true, but I'm I'm not sure how else to remove the coating
[00:56:32] <Valen> http://www.xbhp.com/talkies/attachments/motorcycle-ownership-experiences/57669d1335419229-ktm-200-duke-header003.jpg
[00:56:42] <Valen> wire wheel
[00:57:07] <Valen> I'm thinking transformer base psu
[00:57:10] <Valen> not switchmode
[00:57:13] <Jymmm> LOL, it's a tough coating alone, the last time the fire didn't even remve all of it.
[00:57:25] <Valen> how much do you think i could overload one?
[00:57:52] <Jymmm> Valen: that exhaust pic.... EW white plastic, yuck
[00:58:15] <Valen> eh its for something else
[00:58:21] <Valen> look at the colour of the exhaust
[00:58:27] <Valen> its what happens to hot stainless
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[01:05:49] <andypugh> OK. I have had enough zero-progress for one day. Time to sleep.
[01:06:00] <Valen> lol
[01:06:06] <Valen> thanks for your help
[01:06:10] <Valen> catchya laters
[01:06:37] <andypugh> If it isn't tomorrow, then it wom't be 'till the 23rd. I am off skiing again :-)
[01:07:02] <Valen> its hot and raining here
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[01:10:19] <skunkworks> Mmmm skiing.. I don't know If I am going to get out this eyar
[01:10:20] <skunkworks> year
[01:10:47] <skunkworks> new skis and new boots... I think I have only used them once over the last couple of years
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[01:44:07] <Tom_itx> JT-Shop you around?
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[01:53:09] <Tom_itx> anybody know the lead angle of a DNMG insert?
[01:57:08] * jdh goes with... 55
[01:58:10] <Tom_itx> no, the tool offset angle
[01:58:17] <Tom_itx> usually like 3 deg
[01:58:32] <Tom_itx> i know it's a 55 deg diamond
[01:58:51] <Tom_itx> maybe the holder is what i'm asking about
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[02:07:47] <Jymmm> Valen: Thank you! You were right on the money in respect to tossing an EMPTY bottle into the 700C coals. I filled both of them up, tossed into the coals about 30m ago, and they are still boiling away
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[02:09:12] <Tom_itx> somebody posted a sandvik pdf for me some time back.. care to repost that? i can't seem to find where i saved it
[02:09:30] <Jymmm> sandvik?
[02:09:44] <Tom_itx> insert cutters
[02:10:13] <Tom_itx> i know i saved it but i sure can't find it
[02:10:14] <Jymmm> is that the one with the specs in it?
[02:11:36] <Jymmm> Isn't that the one I painstakenly remoted to two pages?
[02:11:42] <Jymmm> reformatted
[02:13:38] <Tom_itx> possibly
[02:13:51] <Tom_itx> i need metric now
[02:14:14] <Jymmm> ~~~ Sandvik General Turning Insert Identification System, document pages A16-A17 http://www.sandvik.coromant.com/SiteCollectionDocuments/downloads/global/catalogues/en-gb/TURN_H.pdf
[02:19:34] <Jymmm> Tom_itx: ~~~ Sandvik General Turning Insert Identification System, document pages A16-A17 http://www.sandvik.coromant.com/SiteCollectionDocuments/downloads/global/catalogues/en-gb/TURN_H.pdf
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[02:27:46] <Tom_itx> thanks
[02:28:18] <Jymmm> np
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[02:42:04] <Tom_itx> yeah that should do it i think
[02:43:17] <Jymmm> cool, it was a pita to originally locate the correct file
[02:45:10] <Tom_itx> well next time just remind me i have it :D
[02:45:19] <Tom_itx> i hope this works for andy
[02:45:25] <Jymmm> Just search the logs for ~~~ =)
[02:45:41] <Tom_itx> now to work on the 2nd one
[02:46:00] <Jymmm> That's my tag for flagging things to find them easier the next time I'm looking.
[02:47:06] <Tom_itx> now i gotta remember how i did this
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[03:03:00] <ReadError> hey guys
[03:03:01] <Jymmm> Valen: I guess you're good for something after all =)
[03:03:03] <ReadError> just double checking
[03:03:08] <ReadError> the green wire on AC is ground right?
[03:03:16] <Valen> i'm friggin awesome
[03:03:17] <ReadError> (fairly certain just dont want to set any fires)
[03:03:23] <Jymmm> ReadError: US ?
[03:03:26] <ReadError> yea
[03:03:58] <Jymmm> ReadError: GRN == GND, BLK == HOT, WHT == NEUTRAL USA 120VAC
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[03:04:31] <ReadError> thats trippy stuff, DC black is always ground
[03:04:32] <Jymmm> ReadError: Potentially , GRN and WHT can be "bonded" together at the panel in some cases.
[03:04:45] <ReadError> not sure why they decided to throw a curve ball at us
[03:05:04] <Jymmm> Edison vs Tesla
[03:05:28] <Jymmm> It was a HIGE rival way back when.
[03:05:31] <Jymmm> HUGE
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[03:06:30] <Jymmm> Edison even ran a slander campaign saying that AC was dangerous and incinuating that DC was safer
[03:06:44] <ReadError> yea i saw they
[03:06:58] <ReadError> electrocuting animals
[03:06:59] <Jymmm> Edison PAID to have an elephant electricuted to prove AC was bad iirc
[03:07:06] <ReadError> telsa was a way cooler dude
[03:07:15] <ReadError> edison was a business man
[03:07:20] <ReadError> not really an inventor
[03:07:26] <ReadError> tesla was the true genius
[03:07:33] <Jymmm> Edison woulld buy out inventions
[03:07:55] <Jymmm> Yeah, Tesla was awesome
[03:07:56] <ReadError> yea
[03:08:08] <ReadError> did you see the oatmeal comic abou tesla ?
[03:08:10] <ReadError> sad stuff man
[03:08:18] <ReadError> he died drinking milk and eating crackers
[03:08:20] <ReadError> broke
[03:08:26] <ReadError> never had a gf/wife
[03:08:29] <Jymmm> no, I saw the wireless electricity
[03:08:53] <ReadError> http://theoatmeal.com/comics/tesla
[03:08:55] <ReadError> excellent read
[03:09:05] <Jymmm> Well, I geuss he got pleasure from his work.
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[03:09:09] <ReadError> its kinda long
[03:09:13] <ReadError> but worth it
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[03:09:40] <Valen> tesla was also something of a fruit loop
[03:09:51] <Valen> the line between genius and insanity is blury
[03:09:59] <Jymmm> You have to be a lil crazy to survie in this world
[03:10:22] <Jymmm> And who's to say that we are not the "crazy" ones.
[03:10:30] <Valen> I reckon DC will come back
[03:11:05] <ReadError> Jymmm, the oatmeal creator, got a bunch of donations to buy the tesla museum
[03:12:02] <ReadError> http://arstechnica.com/business/2012/10/with-the-oatmeals-help-nonprofit-buys-property-to-build-a-tesla-museum/
[03:12:57] <Valen> didn't he get in trouble for that or was that some other charity thing he did?
[03:13:35] <Jymmm> ReadError: nice
[03:13:41] <ReadError> i think i know what you are talking about but forget what it was
[03:13:47] <ReadError> rings a bell
[03:14:22] <ReadError> https://www.eff.org/press/releases/eff-will-represent-oatmeal-creator-fight-against-bizarre-lawsuit-targeting-critical
[03:14:40] <Valen> that was it
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[03:17:23] <Valen> rofl
[03:17:25] <Valen> http://theoatmeal.com/blog/charity_money
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[03:18:06] <Valen> american money looks soooo fake lol
[03:18:37] <ReadError> lol
[03:20:17] <Jymmm> Valen: Why, because it's not rainbow colored?
[03:20:52] <Valen> because it looks about as hard to fake as monopoly money
[03:21:03] <Valen> I have some american $ on my desk somewhere
[03:21:05] <ReadError> its actually pretty complex
[03:21:12] <ReadError> theres alot of stuff you cant see
[03:21:17] <Jymmm> Valen: It's the paper, not so much the printing
[03:21:22] <ReadError> i saw a show about it
[03:21:32] <Valen> yeah but if you can't see it its not going to help much
[03:21:43] <Jymmm> Valen: You can FEEL it
[03:21:53] <Valen> there we go, just pulled one out
[03:22:08] <Valen> I now have a fresh $1US in front of me
[03:22:25] <Jymmm> A $20 is better
[03:22:47] <Jymmm> $1 doesn't have as many security features.
[03:23:02] <Valen> our notes have the same stuff for all of them
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[03:23:30] <Valen> transparent windows, micro printing etc
[03:23:46] <Valen> whatever plastic they are made out of feels pretty unique too
[03:24:01] <Valen> lots of colours
[03:24:40] <Valen> weren't people faking US$ with laser copiers when they came out?
[03:24:45] <Valen> well enough to pass i mean
[03:25:09] <Jymmm> They been forging a lot longer than that =)
[03:25:23] <Valen> yeah, but thats just really really easy
[03:25:34] <Jymmm> They were used in bill acceptors
[03:28:31] <ReadError> they just revamped them
[03:28:39] <ReadError> thats why we have "new" twenties
[03:29:13] <Valen> some people faked some $50's here, but they didn't have the transparent bit in them
[03:29:34] <Valen> they got busted pretty quick
[03:33:14] <tjb1> Anything stike you when you read the update in the middle? https://www.dropbox.com/s/qnvvplot2al7t2s/Screen%20Shot%202013-02-14%20at%2010.31.55%20PM.png
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[03:45:37] <AR_> not really tjb1
[03:45:38] <AR_> why
[03:47:25] <tjb1> Why would the computer shut off based on battery charge cycles?
[03:49:36] <AR_> because it believe no battery remains
[03:51:07] <tjb1> Charge cycles not battery percentage
[03:52:49] <AR_> yes
[03:52:55] <AR_> but over time it molests
[03:53:06] <tjb1> They are just trying to sell a new battery
[03:53:25] <AR_> hackers
[03:53:27] <AR_> ban apple
[03:54:31] <ReadError> you can flash battery firmware
[03:54:43] <AR_> you can burn battery in fire
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[04:06:07] <Valen> macs could get viruses from batteries for a while
[04:06:51] <Valen> so i can totally see a firmware bug causing weirdness
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[05:09:50] <Gene34> anyone here using "add-on" encoders like http://www.usdigital.com/products/encoders/incremental/rotary/kit
[05:10:44] <cradek> my mill's spindle encoder is made from something like that. they work fine.
[05:10:55] <cradek> the main problem is they're not differential, so be careful
[05:11:34] <Gene34> please share more detail, I take it you can not use it to tap thread
[05:11:48] <cradek> yeah, I use it for that
[05:12:05] <Gene34> what would differential gain me?
[05:12:58] <cradek> noise immunity and high speed
[05:13:18] <cradek> here's the machine: http://www.youtube.com/watch?v=9HLKXeWqTF0
[05:13:35] <cradek> the encoder is deep inside - I don't have pictures of the mounting but it was really hairy
[05:15:43] <Gene34> my system is about ready to crash... stay tuned
[05:17:23] <Gene34> well.... will have to watch later. any options to get full differential?
[05:17:57] <Valen> see if its warranted first
[05:18:04] <Valen> if its cheap and everything supports it do it
[05:18:09] <Valen> but its not manditory
[05:18:33] <Gene34> valen: have you been on here a couple years?
[05:18:44] <Valen> uhh i guess lol
[05:18:48] <Valen> dont make me feel old
[05:18:54] <Valen> i think i remember your nic
[05:19:01] <Gene34> your handle looks familar and as I recall you know your stuff
[05:19:43] * Valen blushes
[05:19:57] <Gene34> please provide me a quick 101. I just purchased a treadmill 3.8hp motor which I did see someone hook up to a gecko servo driver I believe
[05:20:17] <Valen> i gotta get going sorry but you have a minute or two
[05:21:07] <Gene34> it behaved like like a stepper, if I use it for a spindle motor... a non-differential should work fine based on cradek comments.
[05:21:41] <Gene34> work for taping effort. I could disconnect for high speed use during 99% of the time
[05:21:52] <Gene34> is my logic sound... or am I missing something
[05:22:31] <Valen> differential signaling is just a more robust interface
[05:22:33] <Gene34> I see a grizzly 704 cnc in my near future
[05:22:54] <Valen> uses 4 wires not 2
[05:22:57] <Valen> its good
[05:23:03] <Gene34> 4wires
[05:23:14] <Gene34> but no encoder
[05:23:24] <Valen> but if your stuff is shielded and theres not loads of electrical noise around its not required
[05:24:16] <Gene34> what rpm will an encoder of this type start to fall off
[05:24:28] <Valen> depends on its resolution and cable run and stuff
[05:24:32] <Valen> anyway gtg
[05:24:48] <Valen> work out the frequency you are trying to push down the wire
[05:24:52] <Gene34> thanks! enjoy! cradek, you still around
[05:30:23] <Gene34> brb
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[05:38:17] <Gene34> cradek: you still around?
[05:39:14] * Gene34 slaps cradek around a bit with a large trout
[05:41:02] <Gene34> cradek: nice implementation of the encoder and I would like to hear more... much more
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[05:43:14] <uw> anybody ever had anything galvanized from a professional galvanizer?
[05:43:56] <Gene34> ive done some plating myself with limited success
[05:44:17] <uw> do you use a zinc bath method or electroplating?
[05:44:56] <Gene34> electroplating
[05:47:23] <Gene34> cradek: I must crash also, could you provide a link your your encoder so I can research further. Thanks!
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[06:26:10] <Loetmichel> mornin'
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[10:41:34] <bigvalen> http://blog.makezine.com/2013/02/14/3d-printing-revolution-the-complex-reality/ - now that's engineering
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[10:42:03] <bigvalen> (it's worth mentioning that despite the name of the article, the author reckons 3D printing is much weaker than CNCs
[10:42:05] <bigvalen> )
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[13:11:51] <Tom_itx> JT-Shop, you around?
[13:12:11] <Tom_itx> if you see andy, tell him i got the profile into the cad cam
[13:12:25] <Tom_itx> i just need to get the orientation right and spit out some code
[13:22:18] <jthornton> too early for him
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[13:53:27] <jdh> anyone use Galil DMC boards?
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[13:55:54] <skunkworks> no
[13:56:20] <skunkworks> (I have not) I think mach has a pluggin that sort of works
[13:59:40] <jdh> I think one of mine died yesterday, but it just fails to work in an odd manner.
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[14:06:15] <jdh> also seems to be a rather pricey card since all we use it for is to drive one stepper
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[14:12:20] <skunkworks> yeck
[14:12:35] <JT-Shop> Tom_itx: am now
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[14:36:10] <JT-Shop> I had a conversation with a Galil guy that claimed they are the best but the only way to use them is to transmit a 2 letter menomic code line by line
[14:36:26] <JT-Shop> kinda wierd I thought for a CNC application using G code
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[14:46:38] <skunkworks> I talked to a guy at one of the cnc fest that had a lathe converted to galil with mach. He could not thread.
[14:46:54] <jdh> that's true of most mach isn't it.
[14:51:26] <skunkworks> he was a nice guy - I think he one a printer port mesa card at the raffle. We bought some servos and a puma robot arm from him.
[14:51:33] <skunkworks> won
[14:53:49] <JT-Shop> the guy I was talking to kept saying how easy it is to run with a script of some kind in basic or something like that
[14:56:43] <skunkworks> yeck.
[14:57:12] <jdh> I would probably like that.
[14:57:21] <jdh> but, not enough to use windows.
[14:57:54] <jdh> my galil cards are in XP boxes though. This one, the card shows up, the Galil SW can 'register' it, but when it trys to talk to it it hangs up.
[14:59:16] <skunkworks> Have you looked at ebay?
[15:00:00] <jdh> it's for work. I'll just order two from whomever the distributor is.
[15:00:59] <skunkworks> http://www.ebay.com/sch/i.html?_odkw=dnc+galil&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313&_nkw=dmc+galil&_sacat=0
[15:04:08] <skunkworks> we have a galil motion control in one of our automated screen shooting machines
[15:04:27] <skunkworks> It is funny the amps say galil but they are just re-branded amc drives
[15:05:38] <skunkworks> we had one of the amps go out - and the maintenence guy brought it to me - I pulled one out of my desk that I had bought off of ebay for my own use. ;)
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[15:29:53] <pcw_home> Hmm this email from the IRS seems to have come from Paris...
[15:30:21] <jdh> I could save us a lot of cash if our sourcing people would buy things off eBay/etc.
[15:33:11] <JT-Shop> that's a new scam?
[15:33:44] <jdh> not so new
[15:37:13] <L84Supper> maybe the IRS is outsourcing its collections? :)
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[15:40:08] <pcw_home> Sometimes I get a morbid interest in spam that gets through spamassasin
[15:40:10] <JT-Shop> lol
[15:40:26] <TekniQue> I haven't used spamassasin in years
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[15:40:47] <TekniQue> it was a lost battle
[15:41:04] <pcw_home> Seems to get about 99.9% of our spam
[15:41:11] <FinboySlick> pcw_home: You a memeber of 419 Eater?
[15:41:21] <FinboySlick> It's an entertaining sport.
[15:41:24] <jdh> my normal email goes through a box with spamassassin then gets forwarded to gmail
[15:41:42] <jdh> I see maybe 3-4 spams a month
[15:42:04] <pcw_home> I think Spamassasin uses most of our servers cycles...
[15:42:15] <jdh> if that... when I do check my spam folders, I often find things that while technically are not spam, I have no interest in reading.
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[15:54:26] <tjb1> http://www.usatoday.com/story/news/world/2013/02/15/russia-meteorite/1921991/
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[16:00:26] <bigvalen> tjb1, http://zyalt.livejournal.com/722930.html has more photos.
[16:02:00] * archivist giggles at http://cs6081.userapi.com/v6081385/508f/hhp8_8Hlg7g.jpg
[16:02:59] <bigvalen> That was my favourite too
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[16:03:49] <bigvalen> Oh. Probably you guys are bored of this now. But...for CNC use, what's the best 3D package to invest time & money in for hobbists who expect to invest a lot of time ?
[16:03:58] * bigvalen is considering Rhino, but $999 is .. plenty.
[16:04:19] <bigvalen> I've been working with Inkscape & Eagle's GCode plugins for the moment
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[16:08:22] <ReadError> for doing toolpaths or design?
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[16:14:37] <cpresser_> does anyone know a material which is 1. opaque 2. easy to lasercut 3. thin (up to 1.5mm / 1/16in)?
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[16:16:17] <archivist> steel
[16:17:52] <cpresser_> 2. easy to lasercut with a 80W Co2 laser :)
[16:18:10] <cradek> paper
[16:18:34] <cradek> denim
[16:18:42] <jdh> sometimes, asking the question is harder than you think.
[16:18:43] <cradek> I think there are not enough constraints here :-)
[16:19:14] <cpresser_> 4. constaint: durable and not to flexible
[16:19:33] <cpresser_> its going to be used to mask of illuminated acrylic
[16:19:51] <cpresser_> eg, i want to cut a negative of a flower int 'that material' and put it on top of the acrylic
[16:19:52] <jdh> black HDPE?
[16:20:50] <cpresser_> does PE melt reasonably well when laser-cutting?
[16:21:17] <jdh> dunno, probably not.
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[16:21:54] <cpresser_> but the basic idea is good, i should start to check out varius polymers
[16:22:22] <jdh> hero3 comes with the right lens doesn't it?
[16:22:22] <cpresser_> i think ABS might be an option. just need to find a supplier for 1mm ABS sheets
[16:26:40] <jdh> will it melt back together after the cut?
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[16:27:28] <DJ9DJ> namd
[16:30:07] <JT-Shop> skin
[16:31:28] <cpresser_> skin?
[16:32:29] <jdh> not so opaque
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[17:25:24] <Loetmichel> re @ home
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[17:52:57] <jthornton> I think I'll go take a nap that usually makes the UPS man appear as if by magic
[17:53:37] <pcw_home> Thats nice, when I take a nap all that shows up is more work
[17:53:39] <jdh> I'm waiting on a SmartPost(tm) shipment. Should be here any week.
[17:54:43] <jthornton> that's encouraging for sure...
[17:55:36] * jthornton goes to test the nap theory out
[18:02:33] <Tecan> http://www.youtube.com/watch?v=odcwWLtP6BM does this video hurt your eyes too ?
[18:03:25] <Tecan> its giving me a headache actually
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[18:14:06] <Tom_itx> andypugh i managed to get the profiles in the cad cam. just need to get them oriented right and spit out some code for ya
[18:16:39] <andypugh> Thanks. I am starting to feel guilty about the effort this is taking :-(
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[18:17:46] <Tecan> http://www.youtube.com/watch?v=Yh4pPdkrlqw You Might Be A Redneck If......Part 1 of 14
[18:18:30] <Tom_itx> andypugh, i've been wanting to figure out the lathe package anyway. just gives me an excuse to do it
[18:18:50] <andypugh> Nice attempt to assuage my guilt :-)
[18:19:15] <Tom_itx> you'll have to massage the gcode anyway as i don't have a proven post for it
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[18:19:22] <Tom_itx> just some generic ones
[18:21:59] <Tom_itx> looks like the gcode posts positive instead of negative z so i'll have to fix that
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[19:07:21] <Tom_itx> andypugh, are you near your machine?
[19:07:23] <skunkworks> pcw, Yay - ethernet solution!!
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[19:09:15] <Connor> skunkworks: ?
[19:09:33] <skunkworks> Connor, your on the email list - right?
[19:09:42] <Connor> which one ?
[19:09:46] <skunkworks> emc-users
[19:09:49] <Connor> yea.
[19:10:02] <skunkworks> the last email from michal
[19:10:04] <Connor> just joined a few days ago to follow the Arrow 500 thread
[19:11:24] <Connor> looking..
[19:12:00] <Connor> not seeing it.. let me look on the archive...
[19:12:11] <skunkworks> are you billy?
[19:12:14] <Connor> yes
[19:12:16] <Connor> :)
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[19:14:05] <Connor> Not sure why it didn't come through.. I see it in the archive.. let me check my spam folder...
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[19:15:59] <Connor> Nope. not in the junk folder either.. strange....
[19:16:01] <Connor> Oh Well.
[19:19:43] <Connor> So, ethernet support coming for MESA stuff..
[19:19:45] <Connor> cool
[19:19:55] <skunkworks> pete seems excited about his conversion :)
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[19:20:01] <Connor> Yup.
[19:20:30] <Connor> He's a little all over the board on the e-stop and limits.. I think he needs to just take a deep breath.. and we'll sort it out..
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[19:20:50] <skunkworks> heh
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[19:24:49] <Connor> You used a saw blade for the disks?
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[19:25:20] <skunkworks> yes
[19:25:42] <skunkworks> it was only 1 stage as the other end was also a joint
[19:25:54] <Connor> How much off set can it handle ?
[19:26:33] <skunkworks> it was suprisingly flexable - but the thing is pretty dead on axially. We just could not get it perfect for a solid coupling
[19:27:05] <Connor> I still think Olham couplers would be fine for him..
[19:27:08] <Connor> but, it's his machine..
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[19:30:55] <Connor> Why sawblades ?
[19:31:52] <andypugh> Tom_itx: I was. Which means I was a long way from the PC :-)
[19:32:20] <skunkworks> Connor, because they are made to be a bit flexible
[19:32:29] <andypugh> Hacksaw blade or wood saw blade?
[19:32:48] <andypugh> A wood saw is nicely tempered carbon steel, seems like a good choice.
[19:32:57] <archivist> circular saw blade
[19:34:50] <skunkworks> http://electronicsam.com/images/KandT/conversion/yaxis/flexplate.jpg
[19:34:58] <skunkworks> for
[19:35:09] <skunkworks> http://electronicsam.com/images/KandT/conversion/yaxis/adaptfinal1.JPG
[19:35:25] <JT-Shop> cool
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[19:52:55] <L84Supper> http://www.harborfreight.com/electric-die-grinder-with-long-shaft-44141.html anyone try this one yet? Are the bearings good enough to last for >100 hours of use?
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[20:00:48] <andypugh> Bearings can always be changed
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[20:08:19] <andypugh> My dividing head gets stiff to turn the worm of before all the backlash has gone. I wonder if that means that the worm thread depth is more than the wheel tooth depth?
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[20:12:36] <Tom_itx> andypugh, i have a file with a single pass for you to see if it's ok or not before i post one with all the cuts
[20:13:21] <Tom_itx> there's something wierd about the post i used though, you will need to edit the tool numbers
[20:14:01] <Tom_itx> http://tom-itx.dyndns.org:81/~webpage/emc/andyp/
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[20:15:34] <skunkworks> andypugh, that would be my thought...
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[20:28:23] <andypugh> Tom_itx: Rather annoyingly, it gives radius errors
[20:29:22] <andypugh> Possibly a radius-mode thing
[20:29:37] <Tom_itx> i can try to have it post all line segments
[20:29:53] <andypugh> I just realised I was in a mill config
[20:29:59] <Tom_itx> the path is to the center of the tip radius
[20:30:23] <Tom_itx> the tool is on a 5 deg angle to the work
[20:30:24] <Tom_itx> left edge
[20:31:16] <Tom_itx> the material block side is 206mm round od by ~50mm long
[20:31:33] <Tom_itx> you'll want your stock longer to hold it
[20:32:28] <andypugh> Time to eat. Back shortly.
[20:36:05] <Tom_itx> i can change it to line segments if needed
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[21:00:11] * JT-Shop has fun making parts with Touchy-Gremlin-Pyngcgui GUI :)
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[21:07:57] <Tom_itx> bbl
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[21:34:52] <DJ9DJ> gn8
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[22:01:13] <tjtr33> will TWOPASS=ON work for comps loaded in POSTGUI_HALFILE ? ( i get "insmod: error inserting '/usr/realtime-2.6.32-122-rtai/modules/linuxcnc/oneshot.ko': -1 File exists" )
[22:01:49] <tjtr33> the err is on a oneshot loaded in the postguihal file
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[22:06:03] <andypugh> tjtr33: I don't know. But I do know that all doubled-up components have to be by name, not number.
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[22:07:44] <tjtr33> yep all named ( found that the hard way) thx
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[22:11:17] <andypugh> I can see reasons why the postgui file might not be part of two-pass. Everything needs to be up and running by the time postgui is read.
[22:15:41] <tjtr33> andy.. nm i had 'declared' them in 2 files, the err meant 'you did asked for namedthingy already' thx
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[23:02:35] <Tom_itx> andypugh, does that format look like it may work?
[23:03:21] <andypugh> Probably.
[23:03:33] <andypugh> I may need to do something about G91.1
[23:03:54] <andypugh> No, that isn't it
[23:04:01] <Tom_itx> when you're ready i'll generate all the cuts
[23:04:11] <Tom_itx> once we can establish a good format
[23:04:29] <andypugh> I am just puzzled about how it can get the arc radius wrong
[23:05:41] <Tom_itx> i can generate lines
[23:05:45] <Tom_itx> pretty easy
[23:06:12] <andypugh> I think it is probably some header issue.
[23:06:23] <Tom_itx> it sometimes happens in a tight curve where the path is offset from the corner
[23:06:50] <Tom_itx> given the tool geometry it should avoid that
[23:06:56] <Tom_itx> i used .8 as the nose radius
[23:07:04] <andypugh> Truth be told I am rather distracted by packing for my holiday tomorrow, and trying to get a route into my GPS (Turin Airport to Montgenevre avoiding the passes closed by snow)
[23:07:17] <Tom_itx> that's fine
[23:07:25] <Tom_itx> we can take it up next week or so
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[23:07:42] <Tom_itx> just holler
[23:07:45] <andypugh> And what I mean is, that LinuxCNC won't even preview the Gcode
[23:08:03] <Tom_itx> can i simulate lathe on mine?
[23:08:09] <Tom_itx> how do i set that up?
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[23:08:55] <andypugh> choose the sim lathe mm config?
[23:09:01] <Tom_itx> ok
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[23:16:48] <andypugh> 9-wire steppers? What would they be?
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[23:18:32] <TheLargeRod> What's up guys
[23:18:37] <TheLargeRod> noobie here needs some help :(
[23:18:47] <jdh> ask
[23:18:55] <TheLargeRod> Ok so I built a DIY CNC machine
[23:18:59] <TheLargeRod> and I'm using LinuxCNC
[23:19:03] <TheLargeRod> together with EMC2Arduino
[23:19:27] <TheLargeRod> now, I can make squares (on paper and pen for now) 1" squares and they come out pretty perfectly
[23:19:34] <TheLargeRod> I have a precision tool to measure them
[23:19:41] <TheLargeRod> but when I try to make circles or spirals
[23:19:44] <TheLargeRod> they come out square
[23:20:02] <jdh> square square, or just not perfectly round?
[23:20:08] <TheLargeRod> square square
[23:20:12] <TheLargeRod> like 90* angle square
[23:20:42] <TheLargeRod> not even close to round :/
[23:21:22] <TheLargeRod> I've worked backlash to where the machine will run .001" longer or shorter but even itself out after .300" at most
[23:22:20] <jdh> what is the purpose of emc2arduino?
[23:22:32] <TheLargeRod> to control the Arduino board and in turn the steppers
[23:22:51] <jdh> when you run the circles in linuxcnc, does the backplot on the screen look correct?
[23:23:04] <andypugh> Someone else was using that. I was not convinced that it was a great idea.
[23:23:04] <TheLargeRod> yeah on the screen it all looks smooth
[23:23:20] <andypugh> You have the Arduino USB connected?
[23:23:25] <TheLargeRod> Yessir
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[23:23:43] <TheLargeRod> it works fine when I jog the machine or tell it to make squares
[23:24:06] <jdh> does emc2arduino handle g2/g3?
[23:24:54] <TheLargeRod> I;m not sure
[23:25:00] <TheLargeRod> I'm guessing those are arc commands?
[23:25:27] <jdh> yes
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[23:25:40] <TheLargeRod> I;m checking
[23:25:42] <TheLargeRod> that might be the issue
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[23:25:58] <jdh> you can break them up in to tiny linear moves
[23:26:05] <jdh> but, IMO, the whole concept is flawed for real use.
[23:26:16] <andypugh> LinuxCNC does _not_ support USB. With your setup you are really reliant on the emcarduino chap, that project is not part of LinuxCNC (And in my opinion it is wrong-headed and stupid)
[23:26:41] <jdh> I thought "concept is flawed" sounded better.
[23:26:47] <r00t4rd3d> lol
[23:27:01] <TheLargeRod> care to explain why? I'm making do with what's available for now
[23:27:12] <andypugh> I agree. You have a way with words and I am at the bottom of a bottle of Rioja
[23:27:14] <r00t4rd3d> can you get the machine to work okay with just linuxcnc?
[23:27:24] <jdh> do you have a parallel port?
[23:27:41] <TheLargeRod> it's a laptop that I'm using
[23:27:45] <TheLargeRod> so I don't believe so
[23:29:11] <r00t4rd3d> what do you have a motor shield or something?
[23:29:23] <TheLargeRod> just 3 Bigeasy drivers
[23:29:24] <TheLargeRod> from sparkfun
[23:29:38] <andypugh> TheLargeRod: USB introduces latencies of several mS. The emcarduino project attempts to get round this by offloading the realtime parts of the motion controller to the Arduino. This could be made to work, but isn't the direction the core project has taken.
[23:30:11] <TheLargeRod> I see Isee
[23:30:45] <andypugh> Laptops rarely excel at realtime stuff at the best of times.
[23:30:49] <r00t4rd3d> TheLargeRod, have you seen the grbl shields?
[23:31:04] <TheLargeRod> I'm thinking about trying grbl right now
[23:31:17] <PCW> well... core may be drifting that way but I suspect the RT part will have to have enough memory and floating point guts to run all of motion and HAL
[23:31:17] <r00t4rd3d> https://www.synthetos.com/webstore/index.php/assembled-electronics/grblshield-grbl-arduino-diy-cnc-shield.html
[23:31:21] <jdh> the author says no RTAI needed for his stuff, RTAI is only for old school parallel ports.
[23:31:47] <PCW> yeah and hal and motion
[23:31:59] <andypugh> jdh: I can't help feeling he doesn't "get it"
[23:32:05] <jdh> yeah
[23:32:12] <TheLargeRod> no I get it
[23:32:20] <TheLargeRod> I've been around PCs all my life
[23:32:23] <jdh> I was talking about the author
[23:32:24] <TheLargeRod> just my first time around CNC stuff
[23:32:35] <andypugh> TheLargeRod: I believe you, I am questioning the emcarduino author
[23:32:40] <TheLargeRod> ah ok
[23:32:41] <TheLargeRod> sorray :)
[23:32:51] <r00t4rd3d> see his new project? hal2emc
[23:33:12] <r00t4rd3d> or hal2arduino
[23:33:19] <jdh> wonder if you could fit all that in an Arduino Due.
[23:33:43] <PCW> does it have floating point?
[23:33:55] <andypugh> I welcome all peripheral projects, I just wish they would declare their limitations
[23:34:28] <jdh> it doesn't have an FPU, but it does FP emu
[23:35:03] <PCW> better off with a raspberry
[23:35:18] <andypugh> TheLargeRod: I am not sure of your budget constaints. But if you can afford a bare Atom motherboard, memory and small SSD you can build a known-good dedicated controller for <$200
[23:35:42] <TheLargeRod> As far as that goes I've been wanting to grab a Raspberry Pi
[23:35:49] <TheLargeRod> It looks damn good for $35
[23:36:09] <TheLargeRod> budget is tight unfortunately :/ I'm a college student so this is taking up all my spare cash, which isn't much already
[23:36:10] <andypugh> The Pi is fun, but may lack the horsepower to run LinuxCNC.
[23:36:49] <PCW> Just use a old free PC if you are budget constrained
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[23:37:01] <TheLargeRod> yeah that's what I'm using
[23:37:03] <TheLargeRod> an old laptop
[23:37:43] <andypugh> Pi is currently a project for those interested in the challenge, not with a machine to run. It may never work. (Yes, I know that it has been shown to work on Youtube, but that is offloading stepgen to a PIC and GUI to a remote web browser)
[23:39:57] <PCW> I suspect things lake the PI/cubieboard/beaglebone will be great when mhaberler and friends spin of the RT portion of LinucCNC to a HAL and MOTION blob
[23:40:09] <PCW> s/lake/like/
[23:40:44] <PCW> with say network interface from upper layers
[23:40:57] <andypugh> TheLargeRod: Have you looked for a paralle port?
[23:41:11] <TheLargeRod> I hadn't thought the need for one until now
[23:42:08] <andypugh> Let me be clear. I hate them, they are an anachronism, and horrid. But you can drive them direct from software with pretty much exact timing.
[23:43:01] <andypugh> Does the laptop have a 25-pin D-sub (possibly purple) anywhere on the back?
[23:43:12] <TheLargeRod> no it doesn't :/
[23:43:15] <TheLargeRod> it's old but not that old
[23:43:37] <andypugh> My 100% up-to-date Dell at work has one on the docking station
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[23:44:53] <TheLargeRod> I'm gonna go to the garage and flash GRBL
[23:44:57] <TheLargeRod> see what comes of it
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[23:48:17] <andypugh> TheLargeRod: You have two known-to-work options with that computer. You could run Mach3 and a Smoothstepper on USB ($200). Many thousands of people are happy with that (Oh, and you need a Windows license too). Or you can use that computer for other stuff, and build a dedicated LinuxCNC machine controller, for well, about $200 (less if you find an old unloved machine with a parport, but ther are $80 FPGA PCI cards that
[23:48:18] <andypugh> a parport into the weeds)
[23:55:06] <andypugh> or you could help with emc2arduino, but, as I said, I have my doubts about the design philosophy. This may be because I don't understand the project, I am not clear on where he draws the boundary between PC and Arduino.
[23:57:20] <ReadError> i couldnt even get linuxcnc to start without a parport ;/
[23:57:47] <Jymmm> ReadError == OperatorError
[23:58:36] <ReadError> it works on my vmware esxi box just fine
[23:58:44] <ReadError> parallels does not let you emulate it though
[23:58:48] <Jymmm> yo can't expect a car to take you anywhere if you don't have tires on it!
[23:59:02] <ReadError> you can setup a "printer" which writes to a txt file
[23:59:10] <Jymmm> Yes, and most VM's have virtual devices too.
[23:59:15] <ReadError> and once you install the parallels tools it basically breaks linuxcnc
[23:59:16] <andypugh> ReadError: You can. But slowly
[23:59:26] <ReadError> libc or some other lib got overwritten