#emc | Logs for 2011-09-20

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[00:11:48] <alex_joni> night all
[00:15:03] <Tom_itx> gnite and thanx
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[00:17:04] <jdhNC> he's back.
[00:17:40] <alex4nder> are you gone, or away?
[00:17:44] <alex4nder> or back?
[00:18:22] <capricorn_one> I guess the upgrade messed up my setup huh. Sory. need to check again
[00:19:08] <jdhNC> with twat tattoos?
[00:19:22] <jdhNC> <wow, really wrong channel>
[00:19:50] <alex4nder> haha
[00:19:52] <alex4nder> : |
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[01:11:10] -!- mode/#emc [+o Tom_itx] by ChanServ
[01:11:56] <Tom_itx>  /chanserv access #emc list
[01:12:15] <Tom_itx> temporary
[01:12:31] <Tom_itx> but thanx Jymmm
[01:12:46] <Jymmm> np
[01:12:59] -!- mode/#emc [-o Tom_itx] by Tom_itx
[01:14:26] <Jymmm> Tom_itx: you know as soon as I leave he's gonna come back =)
[01:14:36] <Tom_itx> such is life
[01:14:45] <Tom_itx> there's plenty of ops
[01:15:07] <Tom_itx> just finding one when you need
[01:15:10] <Jymmm> Sure, but not for another 12 hours
[01:16:25] <Tom_itx> better behave then
[01:17:16] <Jymmm> Tom_itx: Well if it happens again, just ping me. I'll kick when I see it
[01:18:28] <Tom_itx> or just ask nice to fix his end
[01:18:53] <Jymmm> Tom_itx: It's a kick, not a ban.
[01:21:19] <Tom_itx> i know
[01:21:56] * Tom_itx kicks Jymmm as a visual
[01:22:48] -!- mode/#emc [+o Jymmm] by ChanServ
[01:23:11] * Jymmm sets mode: +b Tom_itx (as a visual)
[01:23:15] -!- mode/#emc [-o Jymmm] by ChanServ
[01:23:41] <Tom_itx> :)
[01:24:07] <Tom_itx> you've never really had any nasty ppl in here have you?
[01:24:26] <Jymmm> like trolls?
[01:24:46] <Tom_itx> well there's that
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[01:25:32] <Jymmm> no, not really.
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[01:30:39] <Jymmm> I saw something interesting today I had never considered at the marine supply store... It was a waterproof batterypack that used 8x D cell batteries. Tha'ts basically 12AH at a 500ma continuous drain
[01:31:23] <jdhNC> what is the intended use?
[01:31:43] <Jymmm> Whatever, it had a cigar socket
[01:33:09] <Tom_itx> that and a 110v ac inverter.. hmm
[01:33:09] <jdhNC> a D is 12A? didn't know they had that much
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[01:35:32] <jdhNC> http://raleigh.craigslist.org/tls/2606661909.html
[01:36:47] <Tom_itx> 3phase?
[01:38:02] <jdhNC> doesn't say. It's 100 or so miles from here... and a Ton or so of metal
[01:38:19] <jdhNC> all of which could be overcome, but I just have no room.
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[01:40:13] <Jymmm> jdhNC: my bad, it's 8AH, not 12AH
[01:41:03] <Jymmm> Energizer USED to have the datasheets with the AH, now they and duracell have replaced them with charts.
[01:41:23] <jdhNC> 8 is still impressive
[01:41:30] <Jymmm> Sure =)
[01:41:49] <Jymmm> AA are around 2AH iirc
[01:42:06] <Jymmm> 9V only like 600mAh
[01:42:20] <Jymmm> if that
[01:42:23] <Tom_itx> 9v suck for pretty much anything
[01:42:35] <Jymmm> well, it is 9V too
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[01:43:11] <jdhNC> 9v is usually 6 tiny cells
[01:44:15] <Jymmm> Yeah, but the idea I liked about this battery pack is that you could use off the shelf batteries instead of some gel-cell if you needed to
[01:44:47] <jdhNC> I don't think I've bought a D cell in 15 years
[01:44:49] <Jymmm> 9x D == 13.5V
[01:45:11] <Jymmm> I have them for my mag lights
[01:45:24] <jdhNC> for hitting people?
[01:45:25] <Tom_itx> i bet yours are led
[01:45:33] <Tom_itx> mine are too old to be led
[01:45:42] <Jymmm> 3x D LED MAG and 4x D LED mag and 2x D krypton Mag
[01:45:58] <jdhNC> 1x 21watt HID
[01:46:16] <Jymmm> jdhNC: Yeah? recharge that during a power outage =)
[01:46:41] <Jymmm> or dead battery on side of the road
[01:47:01] <jdhNC> I get about 4 hours burn time (it's a dive light)
[01:47:10] <Jymmm> I do have a LOT of lights, I kinda collect them.
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[01:47:25] <jdhNC> I picked up a 12watt 4-led light last week, haven't had a chance to try it yet
[01:47:26] <Jymmm> 12M candlepower is the largest battery powered.
[01:48:49] <Jymmm> then 3M, then regular, then squeeze and shake
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[01:49:14] <Jymmm> squeeze is good, shake isnt so much.
[01:49:21] <jdhNC> heh
[01:50:04] <jdhNC> http://www.diverite.com/products/catalog/lights/lt8800
[01:50:15] <jdhNC> not something you carry around in case you might need it.
[01:51:10] <Jymmm> I don't care for specialized batteriess
[01:52:10] <Tom_itx> do they pwm the leds?
[01:52:17] <Jymmm> only 90d warranty on the batteries
[01:52:38] <jdhNC> In general, I don't either... but burntime and size is more important than plain old batteries.
[01:53:19] <jdhNC> the pack is 10x 4500mAh 4/3FAUX NiMH and a $0.50 trailer connector
[01:54:57] <Jymmm> I googled, wth is 4/3FAUX? looks like AA to me sorta kinda
[01:56:04] <jdhNC> a little wider, a little taller
[01:56:22] <jdhNC> some places call them 4/3AF,
[01:56:56] <Jymmm> ah
[01:57:15] <Jymmm> Yeah, most AA you can only get 2500mAH
[01:57:16] <jdhNC> those are usually 4000mAh or less though
[02:00:12] <Jymmm> Heh, get some 18650's and make a 120VDC battery pack =)
[02:02:18] <Jymmm> tough I have nfc how I would charge that
[02:02:22] <Jymmm> though
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[02:02:55] <jdhNC> individually
[02:03:04] <Tom_itx> got a link to that stepper voltage calculator thing?
[02:03:32] <Jymmm> jdhNC: Nah
[02:03:38] <jdhNC> I have a couple of packs made of 20x 20Ah NiMH that I'd like to replae with Li, but they are expensive and scare me.
[02:04:02] <Jymmm> Why? I like NiMH
[02:04:28] <jdhNC> I could fit 50Ah in the same space/weight with Li
[02:04:47] <Jymmm> then replace the batteries in 18-24M
[02:06:16] <jdhNC> that gets expensive.
[02:06:35] <jdhNC> the NiMH pack is $600
[02:06:52] <Jymmm> and LiIon?
[02:07:13] <jdhNC> the drop in replacement is $2k, but it's LiFE
[02:07:36] <Jymmm> Oh
[02:07:44] <Jymmm> I thought you were tlaking Li-Ion
[02:08:03] <jdhNC> it's only about 25 amps, with Li-ion, you could fit 50
[02:08:33] <jdhNC> assuming you could fit the geometry with the BMS/wires/etc
[02:10:00] <Jymmm> I made a power pack from 5x 7AH 12V gel cells
[02:10:50] <Jymmm> fits in a toolbox with a 140W inverter
[02:10:58] <jdhNC> my old scooters used 2x 20Ah or 2x 35Ah cells... can't stand to carry them around.
[02:11:50] <Jymmm> Nope =)
[02:11:58] <Jymmm> But you can
[02:12:51] <Jymmm> This is what I have, but all black... http://www.workshopping.co.uk/product/rechargeable-spotlight-10000000-candlepower/AK438/
[02:13:39] <Jymmm> I'm not that impressed with it to be honest
[02:15:03] <Jymmm> compared to my 1M cp spotlight
[02:17:10] <Jymmm> What I REALLY need is a way to determine remaining capacity and charge duration.
[02:17:53] <Jymmm> I wan to make a tri-power battery pack... solar/car/mains as needed for recharging
[02:18:58] <Jymmm> jdhNC: you might like this http://www.amazon.com/gp/product/B00005RHQQ/ref=s9_simh_gw_p86_d0_g86_i1?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=center-5&pf_rd_r=07JK0CHMPRPV4J18Z918&pf_rd_t=101&pf_rd_p=470939291&pf_rd_i=507846
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[08:33:28] <Cylly> moin (re vom doc)
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[13:05:06] <grommit> When I do a search in the EMC2 forums and click on one of the returned links I get a blank page. This happens on multiple systems. What is up with that?
[13:07:49] <cncbasher> the search function is broken on the website , try the google search box on the page instead
[13:08:33] <grommit> thanks
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[14:35:52] <jthornton> we are working on upgrading the software for the EMC and the Forum website
[14:36:07] <Tom_itx> logger[psha]
[14:38:57] <Tom_itx> ok this flip flop thing. so spindle can't be shut off unless program execution is paused for the pendant...
[14:40:13] <Tom_itx> <andypugh> Tom_itx: A latch, on spindle-on with the reset on not spindle-on and not program-is-running
[14:40:13] <Tom_itx> <andypugh> Maybe http://www.linuxcnc.org/docview/html/man/man9/flipflop.9.html
[14:40:18] <Tom_itx> was suggested
[14:41:02] <grommit> Does anyone know what happed with jcizek and his work on the LCTHC (Low cost torch height controller)? I was looking at the forum, then the IRC archive and he just seemed to disappear after June 4, 2011...
[14:42:27] <grommit> I am about to try to get a LCTHC to work and he had gotten so close. I hope he didn't give up and install Mach....
[14:42:43] <awallin_> mpictor around?
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[14:58:59] <skunkworks> grommit: how is it going with the gantry?
[15:10:26] <skunkworks> http://www.youtube.com/watch?v=AW5-A_ru3-I
[15:11:45] <grommit> We have it working nicely. Have it running reliably at about 3300 ipm (rapids).
[15:12:11] <grommit> Still need to build the Z truck, and get the torch height controller working.
[15:13:03] <grommit> We are going to swap out the Gecko 320x probably today.
[15:13:21] <skunkworks> swap out?
[15:13:31] <grommit> My shopmate bought one that got good reviews but is cheaper than the Granite Device version
[15:14:02] <grommit> Yeah, they are just too damn noisy. We can't get rid of the dithering ('cause that's how they work).
[15:15:22] <skunkworks> our spindle drive is probably the noisiest.. must be 4khz switching frequency. at some rpms - it is more annoying than the hydraulic pumps
[15:15:48] <grommit> http://www.youtube.com/watch?v=2QNrwkAjO_A
[15:16:20] <skunkworks> are you still doing the following error thing?
[15:16:25] <grommit> This is a buzzing coming from each of the motors (4 of them). It really gets on your nerves.
[15:16:36] <grommit> which thing?
[15:16:51] <skunkworks> using the encoders for feedback
[15:17:08] <grommit> Yes, the encoders are hooked into EMC
[15:17:20] <skunkworks> neat - was tuning hard?
[15:17:33] <grommit> So there is essentially a pid loop (gecko) within a pid loop (EMC).
[15:17:51] <grommit> Well looking back on it, no. but yes!
[15:17:57] <skunkworks> heh
[15:18:03] <grommit> Mostly just my inexperience
[15:18:12] <skunkworks> I know what that is like
[15:18:17] <grommit> And the Geckos being annoying
[15:18:37] <grommit> Hey, I do have an issue....
[15:18:42] <skunkworks> That is impressive - I really didn't think those servos at that ratio would perform the way you wanted.
[15:18:54] <skunkworks> What kind of following error are you getting?
[15:19:14] <grommit> I was playing with my Z motor yesterday. We don't have a Z truck yet so the motor is just tie wrapped to the X truck, no load.
[15:19:29] <grommit> I can run is fine in Joint mode
[15:19:58] <grommit> But if I switch to World mode and try to spin it, I get an immediate following error (no matter how high I set the limit in ini)
[15:21:01] <grommit> What is different about world mode that would cause that?
[15:22:15] <skunkworks> hmm - are you using kins for your gantry? I wonder if there is a error (if I understand it right - in joint you are not using kins) where when you switch to kins - either there is a polarity wrong or something isn't hooked up correctly. (I am not familiar with kins based machines - sorry)
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[15:22:49] <skunkworks> hopefully someone else will chime in
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[15:26:57] <JT-Shop> I just drilled 8 holes in a small circular pattern in some 6061 and reamed them... 2,3,4,7 are a slip fit with a .125 pin and 1,5,6,8 are a light press fit...
[15:27:18] <grommit> I am using gantrykins if that is what you mean.
[15:27:25] <grommit> vs trivkins...
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[15:32:22] <cncbasher> jt-shop>slight miss tracking of y axis ? pid giving oval hole
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[15:33:18] <ciccio> hi i bought a chinese TB6560 based driver...how to set EMC to work with it?
[15:35:15] <JT-Shop> cncbasher: must be something, I've been knocking a 0.1252 pin through the tight holes and it has helped
[15:35:43] <ciccio> can you help me please?
[15:37:06] <cncbasher> cicco> what problem do you have , did you read the forum regarding TB6560
[15:37:49] <ciccio> no...can you link it?
[15:38:58] <cncbasher> cicco>http://www.linuxcnc.org/component/option,com_kunena/Itemid,20/func,view/id,3124/catid,16/lang,english/
[15:39:06] <cncbasher> their are others
[15:39:22] <ciccio> ok
[15:39:35] <cncbasher> spend some time reading , and ask if you hit any problem
[15:39:56] <ciccio> mm...yes i used that
[15:40:12] <ciccio> ok i'll try
[15:40:44] <cncbasher> ciccio>what problem do you have ?
[15:41:21] <ciccio> steppers don't spin!
[15:41:55] <ciccio> with my first driver (ULN2803) they spin without problem
[15:43:10] <cncbasher> ok have you connected the enable line
[15:43:36] <cncbasher> without the enable line the steppers will not move
[15:44:40] <cncbasher> this is a logic switch within the pcb that needs to switch on when stepping , you may also need to invert it
[15:44:48] <cncbasher> to get correct operation
[15:45:45] <cncbasher> it seems to be the main problem people have with these controllers , other than that it should work fine
[15:47:43] <ciccio> ok
[15:47:56] <ciccio> the enable is pin 06?
[15:48:28] <ciccio> it's very strange...i have only two axis on emc...X and Z
[15:49:36] <ciccio> why Y is not shown?
[15:50:06] <ciccio> i used this...
[15:50:12] <ciccio> http://wiki.zentoolworks.com/index.php/Morgan%27s_EMC2_Config_for_TB6560_driver
[15:50:35] <ciccio> yes...right...check the screenshoot
[15:51:05] <ciccio> yes...in the screenshoot i followed it's pin 6 on LPT
[15:52:41] <ciccio> is it right?
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[15:55:32] <ciccio> only X
[15:55:43] <ciccio> ok...i'm fixing them...
[15:55:48] <ciccio> i hope
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[16:00:08] <ciccio> ok they work!! but the spins very very slow!
[16:01:05] <ciccio> how to speed up?
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[16:13:41] <cncbasher> cicco> what voltage are your stepper motors and also what voltage is your power supply for them
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[16:22:55] <A2Sheds> contamination aside, why would somebody want to place an encoder strip inside close to the screw vs closer to the table and loads?
[16:23:29] <A2Sheds> pertaining to linear stages
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[17:33:04] <alexx188> does emc use PID for position control?
[17:33:59] <cradek> yes, one of the most powerful configurations is using closed loop control with velocity mode servos, in which case you use pid+ff
[17:34:38] <tom3p> A2Sheds, the placement of the linear scale: place colinear & close to screw to avoid measuring any crabbing.(most mfctrs recommend this).
[17:34:45] <tom3p> mount outside of carriage for ease of install ( and it will see the crabbing)
[17:34:46] <tom3p> either way it really doesnt exactly measure the workpiece position because it doesnt occupy the same space.
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[17:39:47] <alexx188> so who is right? I'm just looking for the source code for the PID under FPGA
[17:42:21] <cradek> alexx188: sorry I don't understand your question now
[17:42:34] <cradek> who is right about what?
[17:43:14] <pcw_home> I guess if cost was no object you could use 2 (or more) scales to measure azimuth error
[17:43:16] <cradek> and on an emc setup, pid is not done inside any fpga; it is done in realtime in the HAL layer in the PC
[17:44:07] <cncbasher> see hal component at_pid.c
[17:45:28] <tom3p> A2Sheds, the influence of the mount position http://www.ift.tugraz.at/topics/Lamdamap_Turan_end.pdf
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[17:50:13] <tom3p> A2Sheds, the 'Abbe and cosine errors ( caused by misallignment and offset from the article of interest ) http://www.engr.sjsu.edu/bjfurman/courses/ME250/ME250pdf/errors.pdf
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[17:53:10] <pcw_home> Nice papers; Interesting in that even with fairly high performance linear motor systems a 4KHz velocity loop was all that was needed
[17:53:12] <pcw_home> certainly within EMCs capabilities
[17:54:20] <grommit> JT-Shop: What ever happened to jcizek and your discussion with him on his LCTHC?
[17:55:06] <grommit> I was following along, reading like a novel (as I am about to try to get the same device working) and it just stops on June 4th.
[17:55:23] <JT-Shop> dunno
[17:55:45] <grommit> oh no. I wonder if he gave up and installed Mach?
[17:55:54] <JT-Shop> might have it all sorted out and not need me any more or that too
[17:56:30] <grommit> bummer :-( I was REALLY hoping to use his configs, but I don't see them posted anywhere.
[17:56:56] <JT-Shop> it's always better to roll your own configs
[17:56:58] <grommit> He did pastebin the hal and ini at one point but I don't know how close he was then
[17:57:18] <JT-Shop> cncbasher: http://imagebin.org/173247
[17:58:55] <grommit> It took him 3 months to get where he was.
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[18:03:55] <grommit> Question: I cannot use the arrow keys on my keyboard to jog my machine at anything other than really slow velocities, but if I run in MDI I can make it fly. I get an immediate following error if I use the arrow keys (I don't even get movement before it faults).
[18:04:24] <cradek> try doing the same MDI test in G61 mode
[18:05:43] * grommit goes off to figure out what G61 is...
[18:07:23] <Jymmm> grommit: Is that like a G6 ?
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[18:08:23] <grommit> G61 visits the programmed point exactly, even though that means temporarily coming to a complete stop.
[18:08:30] <grommit> should be in quotes
[18:09:09] <grommit> So, if I do G61 and do g0 x52 y52 it flys (3310 ipm) to the other side)....But it was doing that before.
[18:10:21] <cradek> my theory was that you accelerating too fast at jog (full accel) but G61 moves would also have failed then
[18:10:54] <grommit> yeah it accelerates right to the full speed with MDI
[18:14:21] <grommit> hmm, it is Y1 axis that faults, no matter which job button I push
[18:14:58] <grommit> If a try to move X axis it faults Joint 1 (which is Y1).
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[18:15:40] <grommit> Or Z also faults Y1...
[18:17:17] <pcw_home> maybe y1 is "faulty"
[18:17:36] <grommit> But it runs great in MDI...?
[18:17:41] <grommit> Just jogging
[18:19:27] <pcw_home> ferror fault?
[18:19:58] <grommit> Yes. joint 1 following error
[18:20:00] <cradek> use halscope and see what's happening
[18:20:27] <grommit> I just see a huge vertical spike on ferror when I try to jog
[18:20:30] <cradek> I don't know what you mean by Y1 so I suspect something related to that is going wrong
[18:20:38] <grommit> when MDI runs, ferror is fine
[18:21:00] <grommit> I have two motors on Y
[18:21:06] <cradek> how exactly are they slaved?
[18:21:15] <grommit> Using gantrykins
[18:21:32] <cradek> are you jogging in joint or world mode?
[18:22:18] <grommit> world. otherwise only the left motor moves (which is bad).
[18:22:57] <cradek> world mode jogging may not work right. using halscope you should try to determine what it is doing wrong
[18:23:15] <cradek> maybe accel or velocity is wrong - you should be able to see either problem
[18:23:20] <grommit> what would I watch to deternine the issue?
[18:23:26] <cradek> commanded position
[18:23:29] <grommit> ferror isn't telling...
[18:23:32] <grommit> ok
[18:23:48] <cradek> if you can't eyeball the derivatives you could set up ddts
[18:23:58] <cradek> but you should be able to see an obvious problem
[18:24:32] <grommit> should I watch the Y1 command position, or the joint I am trying to move (X or Z)?
[18:24:53] <grommit> I guess all the above, eh?
[18:25:02] <cradek> yes that's why it's called debugging :-)
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[18:25:18] <cradek> if I knew the problem already I wouldn't ask you to look for it!
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[18:36:39] <grommit> I don't get any output on axis.X.joint-pos-cmd when jogging. I do when running mdi and moving across the table. Am I looking at the right signal?
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[18:39:04] <grommit> I do see a tiny blip on X-pos-cmd when I try to jog X, just before it faults.
[18:40:10] <grommit> hmm, now I am not getting a joint 1 following error when I jog X, it is a joint 0 (X) following error
[18:41:55] <grommit> you said world mode jogging may not work right....? It turns out if I am in joint mode I can jog X with no problem.
[18:42:12] <grommit> In world mode - immediate fault.
[18:43:13] <grommit> is this just an emc bug, or should I be able to job in world mode?
[18:43:21] <grommit> job==jog
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[19:11:15] * FinboySlick grumbles, "All happy I could find Starrett tools cheap on Amazon.com... And they won't ship to Canadastan."
[19:11:52] <alex4nder> why would you buy Starrett tools?
[19:12:18] <FinboySlick> Well, those I've used so far have been very nice. What would you recommend?
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[19:13:02] <alex4nder> I guess it depends on what you want,.. I ended up buying Tesa (through Brown and Sharpe) for my gear.
[19:13:15] <alex4nder> but everyone has an opinion.
[19:13:59] <FinboySlick> My opinion is fairly mono-cultural. I have a few starret things, and then cheap 30$ noname stuff. Obviously the starrett stuff is leagues above everything else in my world ;)
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[19:15:09] <FinboySlick> I see lots of mitutoyo too.
[19:15:19] <FinboySlick> But haven't actually held one.
[19:16:48] <jdhNC> I have a digital mitutoyo dial indicator. It hasn't been very useful for me.
[19:17:11] <jdhNC> I like my $12 harbor freight needle indicators more.
[19:17:14] <FinboySlick> I'm not sure I'd use a digital dial indicator for much of anything.
[19:17:29] <FinboySlick> much better feedback with needle indicators.
[19:18:38] <FinboySlick> Sort of unsure when it comes to callipers thoughs. I sort of like the ability to switch metric/imperial on the digital ones, but I also like the ability to read between graduations on the needle ones.
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[19:21:42] <A2Sheds> tom3p: nice papers, thanks
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[19:32:51] <A2Sheds> I finally found a home for some leftover Parker ballscrew positioners rated at max load 170Kg and 20 m/sec2 accel. These should be stiff enough for a 2Kg load with .1m/sec2 accel/decel :p
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[19:37:24] <A2Sheds> who carries low cost Nema 23 servos?
[19:37:37] <alex4nder> FinboySlick: I almost bought Starrett for my new DTI, but then I did some research and found 'better' options for the same/cheaper price, still not made in Chicom.
[19:38:30] <FinboySlick> alex4nder: Well, a DTI is exactly what I'm looking for, care to share what you ended up buying?
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[19:39:34] <alex4nder> FinboySlick: Brown & Sharpe 599-7031-5 <-
[19:39:43] <alex4nder> http://www.amazon.com/gp/product/B0006J4Y3E
[19:40:49] <FinboySlick> Fancy. Looks like a well built version of the one I just broke ;) How big is that dovetail stem?
[19:41:37] <A2Sheds> anybody ever order surplus automation components from http://www.plccenter.com/ ?
[19:43:38] <alex4nder> FinboySlick: 1/2" long.. 1/4" diameter
[19:44:10] <FinboySlick> Hmmm, that's pretty nice. Now I need to find a non-overinflated place that will ship to Canadastan.
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[19:44:58] <alex4nder> FinboySlick: wow, amazon.ca kind of sucks
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[19:45:19] <A2Sheds> http://www.shars.com/products/view/1933/1quot_Dial_Indicator_001quot you mean this isn't as accurate as the Brown & Sharpe? :p
[19:45:21] <FinboySlick> alex4nder: Well, they stayed true to what Amazon was 10 years ago ;)
[19:45:57] <alex4nder> A2Sheds: haha, are you trolling?
[19:46:23] <alex4nder> FinboySlick: yah, damn.
[19:46:25] <FinboySlick> A2Sheds: I have a similarly el-cheapo one that's pretty darn nice. But I want the bendy stem.
[19:46:26] <A2Sheds> heh, maybe if you had 14 of the cheap ones and averaged out the readings
[19:47:12] <FinboySlick> For all my use cases, indicators just need to be accurate for a very small range, I use them to line things up.
[19:48:32] <A2Sheds> http://www.shars.com/products/view/1940/1quot_Dial_Indicator_00001quot I wonder what the real accuracy of this is
[19:50:34] <andypugh> A2Sheds: Normal recommendation is Keling for servos, but it rather depends which country you are in. Pico carry some too.
[19:53:11] <A2Sheds> andypugh: <-- USA
[19:54:11] <andypugh> FinboySlick: For that, the little finger ones are more adaptable.
[19:54:24] <FinboySlick> Yeah, that's what I'm looking for.
[19:55:14] <andypugh> http://www.shars.com/products/view/1414/Test_Indicator_Holder_W003quot_Test_Indicator
[19:55:26] <andypugh> Even has a little bracket to clamp to the spindle
[19:55:52] <FinboySlick> andypugh: Wouldn't work on my spindle.
[19:56:13] <FinboySlick> The only spinny part of my spindle is the ER11 collet nut.
[19:56:37] <FinboySlick> I'll need to hold a stem (or ball joint attachment) in the collet itself.
[19:56:43] <andypugh> So hold a peg in the collet and clamp to that
[19:56:58] <andypugh> (Or make something)
[19:57:21] <FinboySlick> Yeah... Just saying the attachment itself wouldn't be of any use to me.
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[20:01:15] <alex4nder> FinboySlick: http://www.noga.com/nogaProducts.php?prdID=NF1018 <- I bought one of these.
[20:02:09] <FinboySlick> alex4nder: Just big enough so it won't fit out of the box ;)
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[21:27:22] <elmo40> alex4nder: they look pricey. how much was it?
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[22:06:31] <landau> hello...i'm using TB6560 controller...what are the corrects values for step time, step space, dir. hold and dir. setup?
[22:07:32] <landau> can you help me?
[22:09:20] <andypugh> landau: You can get close from the Toshiba datasheet
[22:09:46] <landau> do you know the page?
[22:09:56] <andypugh> Assuming that the board manufacturer hasn't put very slow opto-isolators on there.
[22:10:40] <landau> i used 3 wires for the step opto-isolator...
[22:10:47] <landau> bypassing them
[22:11:17] <andypugh> http://www.semicon.toshiba.co.jp/openb2b/websearch/productDetails.jsp?partKey=TB6560AHQ
[22:13:29] <Tom_itx> why would one use ladder logic over the logic in hal?
[22:13:59] <landau> i can't find it? :(
[22:15:34] <andypugh> http://www.semicon.toshiba.co.jp/docs/datasheet/en/LinearIC/TB6560AFG_TB6560AHQ_en_datasheet_110118.pdf
[22:15:55] <andypugh> Tom_itx: Because you are better with PLCs than C?
[22:16:08] <Tom_itx> so just personal preference
[22:16:55] <landau> yes...i see the datasheet but there are a lot of info and numbers
[22:16:59] <andypugh> As I see it, there is a point where HAL components get too messy, so then you use Ladder. Then a point where Ladder is too complicated, so you write a custom HAL component in C
[22:17:02] <Tom_itx> http://www.mycncuk.com/forums/showthread.php/1373-eBay-TB6560-Stepper-Motor-Driver-Boards
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[22:19:31] <andypugh> landau: Try 5uS step time, 0 space. (ie, use Reset on the parport) and 5uS setup and hold. Should be fine.
[22:20:29] <landau> well, but what does it means use Reset on parport?
[22:21:15] <Tom_itx> andypugh so you go from hal to ladder back to hal :)
[22:21:40] <andypugh> Well, I missed out the Ladder stage.
[22:21:54] <andypugh> I believe Ladder is much better at sequencing than HAL
[22:22:47] <andypugh> landau: Rather than turn on the pin on one thread cycle then off on the next, you can set the parport driver to turn off any pin a fixed time after it is turned on.
[22:22:59] <andypugh> Stepconf does this automatically.
[22:23:33] <landau> ok so i must only set new values...right?
[22:23:44] <andypugh> It means that you can step at the base thread frequency, rather than at half the base thread frequency
[22:24:06] <andypugh> Are you using stepconf?
[22:24:50] <landau> yes...i'm using it
[22:25:09] <landau> as 0,0,0
[22:25:21] <andypugh> o,o,o?
[22:25:51] <andypugh> 0 step, 0 space, 0 setup? That is very wrong.
[22:26:12] <landau> no...the pulse type
[22:26:41] <andypugh> Ah, OK.
[22:27:00] <andypugh> TB6560 takes step/dir, so that is correct.
[22:27:06] <landau> ok
[22:27:27] <landau> i used the same stepper with uln2803...very poor performance
[22:27:38] <andypugh> You might find it helps to invert the step signals in stepconf (tick the box next to the pin in stepconf parport setup)
[22:28:05] <landau> yes..done
[22:28:30] <andypugh> ULN2803 is not a high performance option. It relies on winding resistance to limit current, so you can only use very low voltage.
[22:28:45] <landau> i'm searching a way to speed up all steppers
[22:29:04] <andypugh> With a TB6560 you can use 20x the motor rated voltage. That will speed them up.
[22:29:22] <landau> i'm using NEMA 34 at 12 volts...i think it's not enough
[22:29:44] <Tom_itx> try 50v
[22:29:46] <landau> ohhh...very good
[22:29:55] <landau> they are rated at 4.5 volts
[22:29:56] <Tom_itx> if the driver will take it
[22:30:02] <andypugh> No, you want to use 36V with the TB. And really, with that size of stepper, a 100V drive would be better.
[22:30:21] <landau> oh my god!
[22:30:55] <landau> i'll try with 36 volts!
[22:31:54] <andypugh> http://www.zappautomation.co.uk/product_info.php?products_id=559 would be good, that takes mains AC voltage as input.
[22:32:37] <landau> ok
[22:32:55] <andypugh> Rather more expensive, though.
[22:33:08] <landau> but the driver i'm using is new....i received it today...ahahaha
[22:33:20] <Tom_itx> make sure the drivers will take the voltage
[22:33:39] <landau> ok+
[22:34:12] <andypugh> TB6560 is rated for 40V
[22:34:23] <andypugh> 36V gives a bit of headroom.
[22:35:27] <landau> if i use 40 volts...whazz'up?
[22:35:33] <Tom_itx> chinese crap needs headroom
[22:35:57] <landau> hahahaha
[22:36:01] <landau> ok
[22:36:28] <andypugh> Cool! http://www.zappautomation.co.uk/product_info.php?products_id=542
[22:36:46] <andypugh> Stepper drivers that bolt direct to the back of the motor and talk CAN.
[22:38:23] <landau> 40 V
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[22:42:52] <alex4nder> elmo40: the noga? like $70
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[22:51:16] <andypugh> pcw_home: I think I might have found the problem
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[23:23:18] <elmo40> alex4nde1: wow, that is pricey.
[23:23:47] <alex4nde1> not really
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[23:23:55] <alex4nder> I mean, I guess it's all relative
[23:24:01] <alex4nder> but it's a pretty awesome arm
[23:24:10] <elmo40> they are very useful but I think over priced.
[23:27:29] <elmo40> over here (canada) they go for much more then that.
[23:28:14] <elmo40> the NF1024 is $118. MA61003 is almost $250!
[23:31:09] <jdhNC> heh... how was it?
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