#emc | Logs for 2011-09-16

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[00:12:24] <andypugh> mikegg: I am not sure what senseA and senseB do. Pete should know, though.
[00:12:49] <andypugh> At the moment though, I need sleep.
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[00:12:55] <Tom_itx> aww
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[00:19:22] <Danimal_garage> hi
[00:26:06] <Danimal_garage> great.... i think the 7i37 in my mill just died
[00:26:41] <Danimal_garage> awesome........
[00:28:10] <Tom_itx> that would be #2 wouldn't it?
[00:28:17] <Danimal_garage> no
[00:29:29] <Danimal_garage> pcw_home: any idea why a 7i37 would stop working out of the blue?
[00:29:42] <Danimal_garage> it's been working fine for like 2 years, it just quit
[00:45:08] <JT-Shop> Dan did you drop a bike on it?
[00:46:29] <Jymmm> Danimal_garage: Did you pay the annual fee?
[00:47:27] <Danimal_garage> i didn't do anything ti it, it just stopped working in the middle of a program and broke a tool since it controls the spindle
[00:47:43] <Jymmm> fuse?
[00:47:48] <Jymmm> loose wire?
[00:48:48] <Jymmm> JD in the power supply?
[00:49:17] <Danimal_garage> cant be a loose wire if the whole board is out
[00:49:37] <Jymmm> no ground, no worky
[00:49:41] <Danimal_garage> unless it's a bad ribbon cable all of a sudden
[00:50:11] <Jymmm> Danimal_garage: Did ya remove the 4 shovels full of swarf?
[00:51:04] <Jymmm> I had the strangest loose ground once, took me forever to trace it out.
[00:51:12] <Danimal_garage> Jymmm: this is keeping me from shipping shit so i'm not laughing
[00:51:42] <Danimal_garage> i dont see how it's a ground when everything is bolted to the same pannel, but i can swap a ribbon cable
[00:51:51] <Jymmm> Danimal_garage: Hey, I was serious about the fuse, loose wire/ground. so get checking!
[00:51:57] <JT-Shop> any leds lit?
[00:52:03] <Danimal_garage> no led's lit
[00:52:17] <Danimal_garage> on the 5i20 or the 7i37?
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[00:52:26] <JT-Shop> either one
[00:52:32] <Jymmm> Danimal_garage: iirc, are you using the ribbon cable to provide the +5VDC ??
[00:53:32] <Danimal_garage> JT-Shop: no
[00:53:40] <Danimal_garage> Jymmm: yes
[00:53:59] <PCW> Danimal_garage one output failed? could be lots of things probably have to try thing one at a time to isolate the problem
[00:54:08] <Jymmm> Danimal_garage: Start at the PS and work your way down.
[00:54:30] <Jymmm> Danimal_garage: DISCONNECT the PS from it's load(s) too.
[00:55:12] <Danimal_garage> PCW: more than one, i'm guessing the whole board
[00:55:14] <JT-Shop> pcw should there be some leds lit for normal operation on the 5i20 and 7i37?
[00:55:32] <Jymmm> If the PS's test good, reconnect the loads and trace to the end.
[00:55:33] <PCW> could also be 5I20 or cable
[00:55:55] <PCW> 7I37 has no LEDS
[00:56:03] <Danimal_garage> both other boards work fine (7i42 and 7i33)
[00:56:59] <Danimal_garage> i noticed my spindle shut off in the middle of a run, and i also noticed my tool changer isnt working, and my pendant isnt working, all go through the 7i37
[01:00:15] <Danimal_garage> home switches and all buttons and outputs that go through the 7i42 work, along with the 7i33
[01:00:35] <PCW> Like jymm said check the 7I37 power at the 7I37
[01:00:37] <Tom_itx> is there power on the 37?
[01:01:02] <PCW> yes
[01:01:23] <Danimal_garage> where would i check that, the aux output?
[01:01:29] <Danimal_garage> on the 7i37?
[01:01:30] <PCW> yes
[01:02:22] <Danimal_garage> ok checking now
[01:05:09] <Danimal_garage> there is power
[01:05:12] <Danimal_garage> 5v
[01:06:19] <PCW> ok do inputs work?
[01:06:25] <Danimal_garage> no
[01:06:35] <Danimal_garage> well i dont think so
[01:06:44] <Danimal_garage> the pendant doesnt work
[01:07:19] <Danimal_garage> that goes into the 7i37
[01:07:41] <PCW> theres nothing in common on the7I37 between inputs and outputs so that very strane
[01:07:54] <PCW> strange even
[01:09:35] <Danimal_garage> well the 5v aux output powers the inputs as well
[01:10:31] <Danimal_garage> but there is voltage there
[01:10:37] <Danimal_garage> so i dunno
[01:11:12] <Danimal_garage> well should i try swapping out the 5i20 or the 7i37?
[01:11:14] <Tom_itx> check the v on the board not the wires
[01:12:05] <Danimal_garage> v?
[01:12:09] <Tom_itx> voltage
[01:12:22] <Danimal_garage> i checked the voltage at the terminal block on the board
[01:12:29] <Tom_itx> ok
[01:15:04] <Danimal_garage> PCW: should i try swapping something out?
[01:16:36] <PCW> maybe it only the inputs, they have a 3.3v regulator in common
[01:18:12] <Danimal_garage> the outputs are bad too
[01:18:17] <PCW> can you measure with meter - on aux gnd and meter + on left side of RN1 or RN2 (under W1)
[01:18:45] <Danimal_garage> i will try now
[01:19:48] <Danimal_garage> any leg on the left side?
[01:20:22] <PCW> yes they are all tied together on the left (toward board edge)
[01:20:27] <Tom_itx> probably, they're probably pullups
[01:21:54] <Danimal_garage> looks like 5v on both
[01:24:46] <PCW> well no idea. I guess i would start checking one signal at a time, if you have one on the pendant i would trace from pendant to flat cable
[01:25:20] <PCW> is it possible its some field wiring thats broken?
[01:27:00] <Danimal_garage> everything just stopped working out of the blue, all outputs and inputs, dont see anything that could have broken
[01:27:36] <Jymmm> Danimal_garage: You never do, that's always the case =)
[01:28:23] * Jymmm has yet to see a glowing neon light that says "Broken here" with an arrow pointing to the issue(s)
[01:28:43] <Danimal_garage> a wire broke on all my toolchanger's inputs and outputs, along with the enable wire to my vfd for both fwd and rev, and my lendant wires all broke at one time?
[01:28:57] <Tom_itx> if it all failed at once, i'd suspect something in the supply first
[01:29:27] <Jymmm> Danimal_garage: Did you disconnec the load(s) at the PS and test the voltages yet?
[01:30:30] <Danimal_garage> voltage is good, but disconnect what loads?
[01:30:44] <PCW> Thats why i said field power
[01:30:47] <Danimal_garage> the 5v going to the inputs?
[01:31:52] <PCW> yes check that at the input pin pair
[01:35:03] <Danimal_garage> i see 5v at a couple of them but not all, but i dont know if that's because they are closed or not
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[01:36:06] <PCW> so for example one of the pendant encoder wires you should see 5V or 0 across the IBIT- and IBIT+ lines
[01:36:08] <PCW> (make sure you measure across the IBIT-,IBIT+ lines)
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[01:39:03] <Danimal_garage> it started working now
[01:39:12] <Danimal_garage> weird....
[01:39:30] <Tom_itx> find the broken wire or cold solder joint now
[01:39:32] <PCW> bad power connection somewhere?
[01:40:17] <PCW> or flat cable problem or metal particle short or?
[01:40:23] <Danimal_garage> PCW: not possible, the toolchanger supplies it's own 24v, and the pendant and other buttons use the 5v from the aux on the 7i37.
[01:40:38] <Danimal_garage> two completely different sources
[01:40:56] <Danimal_garage> meaning the outputs use a power supply in the toolchanger
[01:40:58] <PCW> sound like you lost 5V power to the 7I37
[01:41:28] <Danimal_garage> the aux 5v terminal was showing 5v
[01:41:42] <Danimal_garage> weird
[01:42:17] <Danimal_garage> everythinng is in an enclosure, no way for chips to get in there really
[01:42:21] <PCW> only thing thats common to inputs and outputs is 7I37 5V power
[01:42:48] <Tom_itx> you checked the power at the terminal but the terminal is soldered to the board
[01:42:53] <Tom_itx> check for a cold solder joint
[01:43:32] * Tom_itx gives Danimal_garage a 10x loupe
[01:43:41] <Danimal_garage> Tom_itx: the aux 5v supplies the voltage to the inputs, i use the ribbon to supplly 5v to the board
[01:43:53] <PCW> connect meter to aux 5V wiggle flatcable, 7I37, W1 jumper see whats flakey
[01:44:32] <Tom_itx> yeah i would suspect the ribbon over anything else. the pins are just smashed into the wire
[01:44:34] <Danimal_garage> even if there was a cold solder joint at the aux output, the outputs wold still work i would think
[01:45:01] <Danimal_garage> ok pcw, i'll check it now
[01:47:08] <Danimal_garage> PCW: nothing
[01:47:33] <Danimal_garage> i mean nothing looks bad, 5v didnt drop
[01:47:48] <PCW> I would suspect flat cable most
[01:47:50] <PCW> A intermittent short may cause this as well (the 5V from the 5I20 is protected by per connectors PTCs so nothing dramatic happens if theres a a 5V short)
[01:48:19] <Danimal_garage> ok well i'll keep an eye on it
[01:48:31] <Danimal_garage> not sure what else to check since it's working again
[01:48:56] <Danimal_garage> thanks for the help
[01:48:59] <PCW> pretty much has to be loss of power
[01:49:13] <Danimal_garage> maybe the fan sucked in a drop of coolant?
[01:49:36] <Danimal_garage> very unlikely, but just thinking out loud
[01:50:35] <Tom_itx> doubtful
[01:51:05] <Tom_itx> i've seen where the end of the cable is cut off, a small single strand of wire got pulled into the ajacent wire
[01:51:18] <PCW> a pretty small metal flake could be a problem as well (since unlike our mil stuff cards are not conformal coated)
[01:51:20] <Tom_itx> if the cutting tool is a bit dull etc
[01:52:04] <Tom_itx> kindof a long shot but i've seen it
[01:52:45] <PCW> Maybe a tin whisker...
[01:53:24] <Tom_itx> the card is hardly old enough for that isn't it?
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[01:54:16] <Tom_itx> i think it will become one of those mysteries...
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[01:54:47] <PCW> No, I dont think we've actually every seen one (though weve been doing ROHs since 2006)
[01:55:12] <Tom_itx> i don't honestly know how quick they grow
[01:55:53] <Tom_itx> that's probably going to become more a problem on RoHS though wouldn't you think?
[01:56:54] <PCW> Not really even supposed to be a problem with proper matte tin plating
[01:57:15] <Ze1982> You talking about tin whiskers?
[01:57:40] <Tom_itx> ja
[01:58:14] <PCW> Its pretty much impossible to get non-RoHS parts nowadays, most manufacturers have discontinued leaded parts
[02:20:10] <Ze1982> I thought leaded parts were susceptible to tin whiskers anyway
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[02:49:47] <ve7it> Jymmm, Lawrence 2, cod fish 0
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[06:20:05] <Loetmichel> mornin'
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[06:23:00] <archivist> any .au in today http://www.woodworkforums.com/f65/vintage-machine-tools-whole-factory-full-about-go-scrap-141117/
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[06:57:15] <Loetmichel> hmmm... someone there with a jumpstart-cable? friday morning @8:50 and the workday still hasnt ended... i think i need a BIG bag of "work-motivation"... :-(
[06:59:24] <Loetmichel> <- is running on empty today.
[07:00:06] <archivist> dream of the wages
[07:00:50] <psha[work]> Loetmichel: sorry man, but even small bags ow 'work-motivations' are out of law here :(
[07:01:35] <Loetmichel> archivist: wages? alms would be mor fitting fot the few bucks ;-)
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[07:52:14] <Loetmichel> archivist: if i look at my payment slip i go crying.
[07:52:52] <Loetmichel> i have 2800 Eur before taxes... and 1452eur after taxes :-(
[07:53:17] <Loetmichel> but i have a (normally) very stisfiying job so i think its ok
[07:53:39] <Loetmichel> oh, the wages are per month ;-)
[07:56:25] <Loetmichel> correction: its 1459 eur after taxes
[07:57:13] <Loetmichel> (just found the payment slip from last month on my desk)
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[09:53:12] <factor> on my l298 I need to place resistors either parallel to stepper coils or along each current sense
[09:53:27] <factor> the best method I would think would be along the current sense .
[09:53:44] <factor> is that the purpose of the current sense outputs.
[09:58:24] <factor> datasheet says it does need a sense resistor to control current
[10:01:37] <factor> looking at some schematics they forget the resistor completely. or make a hack on the motor coils themselves, really bad move
[10:02:21] <factor> was hoping the sense A B where for that. looks like they where and will put a resistor on them.
[10:03:06] <archivist> just look at the example circuits in the SGS application note
[10:08:48] <factor> have the right res 0.5 ohm
[10:09:15] <factor> just saw some circuits with 4 one on each motor line
[10:10:04] <factor> which would waste a lot of power and limit your power overall
[10:11:07] <factor> now to go about wiring up my connector with the resistors in it
[10:14:55] <archivist> the ones with series resistors also have higher voltages, they improve the the switching time, you still need the current sense
[10:15:39] <archivist> even better is use a bipolar drive and not an L298
[10:19:41] <factor> have not seen any schematics in series
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[10:22:21] <archivist> you set the power by the current, ignore the voltage written on a stepper and use 30-50 volts if you can
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[12:02:48] <factor> I still ended up with a resistor on the motor side. did not want to do that.
[12:03:22] <archivist> show us the circuit
[12:05:34] <factor> dont have it close at hand.
[12:06:16] <factor> works like a charm if I put a resistor on both sides sense AB and one post of each motor coil
[12:06:31] <factor> bi polar motor.
[12:07:07] <factor> but luckly I have a 5 watts resistor
[12:07:12] <factor> the motor is a 5 watt motor
[12:07:37] <factor> testing on a 5v .1A motor right now though
[12:09:02] <factor> Will need to make one up later. that matches the one I made now
[12:12:19] <archivist> why do you think you need a series resistor in the motor winding
[12:12:38] <Valen> I have had a series resistor make my motor run better
[12:12:53] <Valen> turns out I was hitting the current limit without it and the foldback totally killed the power
[12:13:08] <Valen> but that was a servo
[12:13:10] <archivist> series R improves switching speed
[12:13:35] <archivist> with higher voltage
[12:16:12] <factor> sorry was afk
[12:16:27] <factor> its kinda not series
[12:16:55] <factor> n-/\/\/-n
[12:17:02] <factor> eachn is a coil winding
[12:17:12] <factor> the 5 watt .5 resistor is connecting them
[12:17:48] <factor> so i guess it would be H--/\/\/--H
[12:18:14] <factor> or ||--/\/\/\--||
[12:18:25] <factor> the outter posts are not connected
[12:18:39] <factor> but the resitor is connected to one post of each coil
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[12:49:31] <jthornton> http://gnipsel.com/shop/gantry/gantry.xhtml
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[12:59:22] <alex_joni> jthornton: looking good
[13:05:24] <JT-Shop> alex_joni: thanks
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[13:57:33] <awallin_> is the segmentqueue paper somewhere online still?
[13:57:53] <awallin_> used to be http://cvs.linuxcnc.org/cvs/emc/doc/ segmentqueue.pdf
[13:59:31] <cradek> http://www.google.com/search?q=segmentqueue.pdf second link
[14:00:11] <awallin_> thanks.
[14:00:24] <cradek> (you could also get it out of sourceforge's old emc cvs)
[14:01:43] <awallin_> also, was there some trajectory planning notes by jmk that are not on the wiki? "polynomial blending" or something similar??
[14:02:04] <cradek> I don't remember that
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[14:12:46] <skunkworks> is it friday finally?
[14:13:04] <awallin_> think so..
[14:23:04] <pcw_home> starting to be...
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[14:25:11] <pcw_home> skunkworks: did you ever try that bitfile I sent to see if it fixed the muxed encoder velocity scaling error?
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[14:25:38] <pcw_home> good timing
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[14:52:02] <Tom_itx> pcw_home, driving a 5v load from the 7i43 do you know the current rating on the pins?
[14:52:31] <Tom_itx> ie a solid state relay
[14:56:24] <pcw_home> 24 mA (source from 3.3v or sink to 0V)
[14:56:26] <pcw_home> probably need open drain mode with SSR + to 5V
[14:57:30] <Tom_itx> that's a jumper on the board right?
[14:57:35] <Tom_itx> i think i have that set already
[14:58:10] <pcw_home> open drain mode is a per GPIO option in the HAL file
[14:58:18] <Tom_itx> oh
[14:58:22] <Tom_itx> ok
[14:58:50] <Tom_itx> well, i should get another daughter card for this but for now i was gonna drive that and the limit switches direct
[14:59:21] <Tom_itx> probably put a 1k on the limit switches as a precaution
[14:59:30] <pcw_home> so for open drain active low you need 3 parameters set per output pin (is_output, output_invert, is_opendrain)
[14:59:42] <Tom_itx> ok
[15:00:03] <Tom_itx> the limits would be input
[15:00:12] <Tom_itx> but the ssr out
[15:00:55] <pcw_home> yeah a 300 to 1K series resistor will save the FPGA if you connect to something wrong (like-V or 12v etc)
[15:01:27] <Tom_itx> i figured
[15:01:48] <Tom_itx> it'll just be 5v supplied from the board
[15:02:30] <pcw_home> for limits I would use maybe 300 (1K may not pull the inputs low enough to fight the built in input pull ups)
[15:05:06] <Tom_itx> ok
[15:05:15] <Tom_itx> i'll experiment with that a bit
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[15:35:37] <A2Sheds> pcw_home: have you found the internal pullup resistors to be reliable in xilinx fpga's? or do you add or recommend external pullups for high-rel applications?
[15:39:41] <JT-Shop> my Samson gear head 14" x 36" lathe has a tiny leak in the upper gear box. I can't remember what weight oil I used to fill it up when I bought it 10 years ago and can't find the container :/ anyone have a clue as to the proper weight oil?
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[15:40:12] <JT-Shop> it's your typical Taiwan lathe from the 80's
[15:45:19] <pcw_home> The internal pullups are fine, just somewhat unpredictable in value
[15:45:21] <pcw_home> we dont have external pullups on low-end cards (7I43 for example)
[15:45:23] <pcw_home> and use the FPGA pre-config pullups and add pullups in the configuration
[15:45:52] <pcw_home> (pre config pullups = hot swap enable)
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[15:56:01] <Loetmichel> re @ home
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[17:00:28] <IchGuckLive> hi all
[17:00:49] <IchGuckLive> someone here how can help me to set up a 5 axis sim mashine
[17:01:28] <IchGuckLive> im trying to change the sim9 Axis
[17:02:19] <IchGuckLive> ERROR emcTrajSetAxes failing: axes=5 axismask=e3
[17:02:52] <IchGuckLive> is this a error of the hal or the ini
[17:03:56] <motioncontrol> i thing ini
[17:05:21] <IchGuckLive> does axes=5 mean on the config of AXIS_4
[17:08:47] <motioncontrol> yes start axis 0 fine axis 4 for 5 axis
[17:09:36] <IchGuckLive> i will upload the ini one moment
[17:10:29] <IchGuckLive> http://paste.pocoo.org/show/477090/
[17:10:34] <IchGuckLive> here it is
[17:11:41] <motioncontrol> the problem is here :COORDINATES = X Y U V C
[17:12:01] <motioncontrol> correct is x y z a b
[17:12:15] <motioncontrol> x y anz z linear
[17:12:27] <IchGuckLive> but i do need the mashine in the given order
[17:12:28] <motioncontrol> a and b angular
[17:13:31] <IchGuckLive> motioncontrol: the sim shoudt be for a EDM
[17:14:00] <motioncontrol> EDM ?
[17:14:09] <IchGuckLive> Wirer cut
[17:14:43] <motioncontrol> not have the vertical axis ?
[17:15:17] <IchGuckLive> no only 2 plains XY with given distance and a Turntable for the part
[17:15:55] <motioncontrol> a ok don't know this geometry
[17:16:06] <alex4nder> hey
[17:16:17] <IchGuckLive> i can giv C a B as it turns around YV
[17:16:30] <motioncontrol> yes i thing
[17:16:51] <motioncontrol> x y u v a
[17:17:17] <IchGuckLive> a is not good for the cam it has to by B
[17:17:38] <motioncontrol> excuse test axis write 9
[17:18:10] <motioncontrol> AXES = 9
[17:19:41] <IchGuckLive> got it
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[17:20:58] <automata> hi
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[17:40:03] <IchGuckLive> motioncontrol: how do i home this axes there is no sequenz in the simulated_home
[17:40:13] <IchGuckLive> simulated_home5axis.hal:4: Pin 'comp.3.in0' does not exist
[17:41:27] <IchGuckLive> http://pastebin.com/y5GkrR7Z
[17:41:46] <IchGuckLive> this is the changes home hal file
[17:44:33] <motioncontrol> the setp write after addf the treads
[17:47:32] <IchGuckLive> so the error is ?
[17:48:58] <motioncontrol> the problem is in hal file please pastebin all hal file
[17:51:02] <IchGuckLive> this is my starting hal file http://paste.pocoo.org/show/477098/
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[17:51:15] <Danimal_garage> hi
[17:52:36] <motioncontrol> poste your hal file
[17:52:39] <IchGuckLive> it calls in line 100 this hal file
[17:52:43] <IchGuckLive> http://paste.pocoo.org/show/477100/
[17:53:19] <IchGuckLive> so first is this a error to change the AXIS_X nummbers
[17:53:49] <IchGuckLive> i also deledet the not used TRAY entry axis
[17:53:56] <motioncontrol> loadrt comp count=4
[17:54:32] <motioncontrol> start pointer is 0
[17:55:31] <IchGuckLive> simulated_home5axis.hal:5: Pin 'comp.4.in0' does not exist
[17:55:42] <IchGuckLive> so is comp count = 5 for 5 axis
[17:56:18] <IchGuckLive> yes
[17:56:58] <IchGuckLive> it oly homes 3 Axis
[17:57:03] <IchGuckLive> XYB
[17:57:13] <IchGuckLive> UV ius not homed
[17:57:52] <IchGuckLive> http://pastebin.com/y5GkrR7Z
[17:59:02] <IchGuckLive> pleas discribe line 31-33 to me
[18:02:08] <IchGuckLive> line 32 is Z axis ther is no Z axis in the declare
[18:02:54] <IchGuckLive> oh i need to go tommorrow ne try the 3td day for sim setup i will go for 8 at leaast B)
[18:03:01] <IchGuckLive> Thanks motioncontrol
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[18:13:42] <mrsunshine> hmm, is it posible to make something like epoxy granite with polyester resin ? :)
[18:14:17] <awallin> I guess.. with lower mechanical strength. more shrinkage. and bad smell :)
[18:14:27] <awallin> but cheaper
[18:14:55] <jdhNC> I like the smell
[18:15:00] <mrsunshine> ahh shrinkage etc .. thats a problem i guess =)
[18:15:17] <automata> hi,
[18:15:18] <awallin> styrene is not good for you. your brain will "dissolve".
[18:15:51] <awallin> I think polyester shrinks maybe 4% and with epoxy it is 0.5%. something like that..
[18:16:26] <automata> Just like emcStatus can be remote accessed by emcrsh, is there any remote access module for emcioStatus?
[18:16:28] <jdhNC> it absorbs water too
[18:16:33] <mrsunshine> and aparently leaves a bad finnish also
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[18:17:00] <jdhNC> never had a problem with finish
[18:17:06] <jdhNC> I use it for boat repairs
[18:17:21] <mrsunshine> jdhNC, well if mold casting polyester it apears its a problem
[18:17:33] <mrsunshine> when it shrinks it tries to draw uncured resin from wherever it can
[18:17:39] <mrsunshine> leaving a bad finnish on the objects
[18:17:50] <jdhNC> gotcha... never used it where it was very thick
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[18:44:47] <Danimal_garage> awesome, all my work offsets dissapeared again...
[18:44:57] <Danimal_garage> grrrr
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[18:59:49] <Jymmm> Danimal_garage: You're back up and running again?
[19:00:37] <Jymmm> Danimal_garage: What was the problem?
[19:04:35] <A2Sheds> mrsunshine: is there a reason that you'd like to use polyester rather than an epoxy for a composite?
[19:04:42] <Danimal_garage> Jymmm:
[19:04:43] <Danimal_garage> yes
[19:04:46] <A2Sheds> lower cost? or?
[19:04:55] <Danimal_garage> don't know, it just started working again
[19:05:33] <Jymmm> Danimal_garage: that's not good at all. Intermittant short/open is something you really should trace out.
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[19:06:00] <Danimal_garage> it's a card
[19:06:24] <Jymmm> Danimal_garage: No, it's an entire SYSTEM connected to a card.
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[19:13:10] <A2Sheds> mrsunshine : if you can go with a cement + acrylic with your aggregate is will a much higher compression strength than an epoxy composite
[19:13:30] <A2Sheds> is will/it will have
[19:15:45] <mrsunshine> A2Sheds, for one its easier to get my hands on and its cheaper :P
[19:15:57] <A2Sheds> but it won't work as well as an epoxy composite for a machine base
[19:16:02] <mrsunshine> cement acrylic ?
[19:16:40] <A2Sheds> cement with an acrylic emulsion added with water
[19:17:05] <mrsunshine> like paint?
[19:17:25] <A2Sheds> yes, similar
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[19:17:57] <mrsunshine> A2Sheds, was thinking of making a small desk machine using some castable material =)
[19:18:10] <mrsunshine> i can go with alu tho as i have a furnace but :P
[19:18:22] <mrsunshine> and alu i actualy can face etc
[19:21:19] <A2Sheds> I was developing some formulations a few years ago, it was really tough and not easy machined
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[19:21:56] <A2Sheds> very low cost
[19:22:32] <mrsunshine> the concrete thingie?
[19:22:38] <A2Sheds> yes
[19:22:43] <archivist> mrsunshine, just cast into the epoxy/whatever some metal pads that can be machined
[19:22:56] <mrsunshine> archivist, true =)
[19:27:40] <mrsunshine> but concrete isnt very dimensionaly stable is it? :)
[19:28:37] <mrsunshine> shrinks at casting and shrinks over time the first year or so ? :)
[19:29:24] <mrsunshine> is the emulsion to seal the concrete?
[19:30:14] <A2Sheds> it's a plasticizer
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[19:30:32] <archivist> the stone in the concrete should hold dimension
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[19:30:53] <A2Sheds> it all depends on the mix
[19:32:08] <mrsunshine> hmm, gave me a thought, a plasticier would that make the mix more "plastic" as in if i add somethign that foams it would have an easier time blowing the concrete up ? :)
[19:32:15] <mrsunshine> for insulation purposes
[19:32:33] <A2Sheds> google for concrete Acrylic Superplasticizer or plasticizer
[19:32:57] <A2Sheds> yes, you could make a foam
[19:33:14] <mrsunshine> (been experimenting with furnace linings)
[19:33:19] <A2Sheds> or add fiberglass and other polymer fibers
[19:33:34] <mrsunshine> tho, using ordenary concrete to make foam i can just add fine alu filings, but with the special furnace cements that doesnt work :/
[19:34:04] <A2Sheds> cement is sort of like saying plastic, can be about anything
[19:36:59] <mrsunshine> need to make myself a vibrating table =)
[19:37:15] <A2Sheds> orbital sander
[19:37:30] <syyl> for epoxy cement?
[19:37:38] <syyl> you will need a pretty heavy vibrator
[19:37:40] <mrsunshine> for all sort of cement stuff =)
[19:37:51] <syyl> with adjustable frequency
[19:37:57] <syyl> to hit the sweet spot
[19:38:10] <mrsunshine> vfd + electric motor :P
[19:38:20] <syyl> thats the way to go ;)
[19:38:31] <syyl> gotta love vfds... :D
[19:38:47] <mrsunshine> got a 2kw vfd just laying around =)
[19:39:04] <mrsunshine> should do the job for a small vibrator table :P
[19:39:04] <syyl> all my machines have one
[19:39:21] <syyl> even the shaper :D
[19:39:29] <mrsunshine> got one for the mill, small one, 0.75kw =)
[19:39:48] <mrsunshine> and one that i bought to use with the mill but i didnt end up using it, felt it was to big =)
[19:40:14] <syyl> hrhr
[19:40:27] <mrsunshine> always good to have one to many i always say :P
[19:40:34] <mrsunshine> or, i never say that but i should say that more :P
[19:40:49] <mrsunshine> gah i wish i could free up some space so i get my hobby room back :/
[19:41:04] <mrsunshine> need to finnish scraping the mill, and get the lathe working again
[19:41:09] <mrsunshine> so i can start making stuffs =)
[19:41:11] <syyl> owning something is better than needing something ;)
[19:42:29] <syyl> hmm
[19:42:42] <syyl> my shop looks like a carpentry at the moment...
[19:43:00] <mrsunshine> mine is full of shit from the outhouse or whatever its called ... barn or something
[19:43:07] <mrsunshine> as im restoring it i needed to put stuff somewhere
[19:43:08] <syyl> making models for casting aluminum
[19:43:13] <syyl> wood dust everywhere
[19:43:34] <mrsunshine> its going to become a wood shop so i dont need to mix the metal working and wood working anymore =)
[19:43:43] <syyl> ah, thats nice
[19:43:53] <syyl> mine is a metal shop
[19:44:01] <syyl> but from time to time i have to do woodwork..
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[19:44:23] <mrsunshine> wood work is nice, specialy when casting is so easy and nice to do =)
[19:44:27] <mrsunshine> making patterns etc
[19:44:48] <mrsunshine> and we got a buisiness making light things you stand in the window during the winter =)
[19:44:57] <syyl> normaly i prefer polyurethane foam for moldmaking
[19:45:12] <syyl> doesnt produce that much dust
[19:46:23] <mrsunshine> http://3.bp.blogspot.com/_UIKY9LAnC2E/TPP-VPUQVEI/AAAAAAAAAe4/gvjWQpY8ukg/s1600/IMG_2588.JPG <--- is what we make :P
[19:47:35] <syyl> aaaaah
[19:47:47] <syyl> christmas ;)
[19:47:49] <syyl> *runs*
[19:48:01] <mrsunshine> tho thats one my fathers brother has made looks a bit different then ours =)
[19:48:28] <syyl> last week i did a work, total different to that, what i do normal...
[19:48:36] <syyl> i cast a big boot from wax...
[19:48:55] <syyl> http://dl.dropbox.com/u/24396704/2011-09-14_18-36-44_522.jpg
[19:48:57] <mrsunshine> big boot? :P
[19:49:03] <syyl> opening the mold :D
[19:49:10] <mrsunshine> wth ? :P
[19:49:17] <syyl> http://dl.dropbox.com/u/24396704/2011-09-14_19-03-25_105.jpg
[19:49:32] <mrsunshine> why do you do that? :P
[19:49:35] <syyl> friend of mine marries
[19:49:41] <syyl> and thats his pressent
[19:49:59] <syyl> as he and his future wife are shoemakers
[19:50:17] <syyl> in the wax, there are about 250eur in coins embeded...
[19:50:27] <mrsunshine> omg i can feel the "marries with children" theme :P
[19:52:44] <syyl> :P
[19:52:51] * Loetmichel hears rather "love and marriage, go together like a horse and carriage..."
[19:52:53] <Loetmichel> ;-)
[19:53:34] <Loetmichel> *shi**, no i have the melody rining in my ear and cant get rid of it :-(
[19:53:36] <Tom_itx> one is always dragging the other?
[19:54:54] <Loetmichel> oh... thats the same song
[19:55:35] <Loetmichel> sorry, i didnt know what "Eine schreckluich nette familie" was titled in English ;-)
[19:55:52] <Loetmichel> schrecklich
[19:58:02] <Loetmichel> but i thoght ed O'neil was a shoeSELLER, not a shoeMAKER ;-)
[19:58:19] <mrsunshine> yeah true :P
[19:58:28] <mrsunshine> o'neal ?=
[19:59:19] <Jymmm> Wait... if they're showmakers, why in the hell would they want another shoe for a present? (I'm just asking)
[19:59:29] <Jymmm> s/w/e/
[19:59:34] <Loetmichel> mrsunshine: AL
[19:59:57] <Loetmichel> Jymmm: a shoe out of wax filled with coins
[19:59:58] <mrsunshine> Jymmm, shoe
[19:59:59] <mrsunshine> not show :P
[20:00:04] <syyl> because its big, made of wax, filled with coins ;)
[20:00:09] <syyl> will make a hell of a mess
[20:00:18] <Jymmm> mrsunshine: 2011-09-16 12:59:28 Jymmm: s/w/e/
[20:00:51] <mrsunshine> ah :P
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[20:05:30] <Jymmm> eh, nothing boiling water can't resolve.
[20:06:25] <syyl> or a torch...
[20:06:41] <Jymmm> no need, wax melts around 180F
[20:06:49] <syyl> but it has fire ;)
[20:06:52] <Jymmm> or less
[20:06:54] <syyl> more fun
[20:07:05] <syyl> we melted the wax in a bath of hot water
[20:07:43] <Jymmm> so how are they to know theres coins in the shoe?
[20:08:01] <syyl> we will give em a hint
[20:08:20] <syyl> there will also be a steel ball, chain and bracket...
[20:08:45] <syyl> just as a symbol for marriage ;)
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[20:54:10] <Jymmm> syyl: I thought that was a pre-nump?
[20:54:32] <syyl> nump?
[20:54:57] <Jymmm> I keep all the money if we get divorced thing
[20:55:49] <syyl> hmm
[20:56:07] <syyl> a bit soon to think of divorce, i think :D
[20:58:56] <archivist> think ahead...stay single
[20:59:35] <syyl> to be single issnt the badest thing
[21:04:56] <Jymmm> Heh, it's all prostitution in one form or another. Get married (a legally binding contract) you get sex (among other things) and you buy her a house, car, jewelry, etc.
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[21:20:45] <grommit> I am so happy. We finally got the gantry running smoothly. And oh, does it run! http://www.youtube.com/watch?v=2QNrwkAjO_A
[21:22:08] <Tom_itx> been fine tuning?
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[21:22:21] <grommit> A lot!
[21:22:36] <grommit> We are going to replace the Gecko 320x's.
[21:22:51] <grommit> They are a PIA the tune and we cannot get them to quiet down at all.
[21:23:06] <grommit> But we have them at a manageable noise level and they are working.
[21:23:17] <Tom_itx> replace with what?
[21:23:33] <Jymmm> grommit: cool that you got it working
[21:23:48] <grommit> Probably Granites or perhaps may try a cheaper one that got decent reviews...
[21:25:45] <Jymmm> grommit: You might call Mariss and just ask him.
[21:26:00] <grommit> I talked with him for about 2 hours a while back.
[21:26:07] <Jymmm> and?
[21:26:44] <grommit> He is a great guy, knows his shite.
[21:27:00] <Jymmm> Yes he does.
[21:27:10] <Jymmm> but what did he say about your issue(s) ?
[21:27:15] <grommit> But the Geckos have a "feature" called dithering that is just ridiculous.
[21:27:22] <grommit> My issue is a feature ;-)
[21:27:46] <Tom_itx> those are servo drivers?
[21:28:01] <grommit> They will always sit and dither between one encoder count and the other. And it is loud as hell.
[21:29:32] <grommit> Each motor buzzes as it dithers. I can get it pretty quiet on the X axis, but the Y axis, probably because it is heavy, is not able to get it below a dull roar.
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[21:30:20] <Jymmm> what did he say about that?
[21:30:36] <grommit> I love the 203v's that I have on my mill. You can have the 320x. Really. Want them? ;-)
[21:30:53] <grommit> He said that it is how they are designed.
[21:31:03] <Jymmm> ah
[21:32:53] <grommit> He had a lot to say about why, much of which went over my head. I wish I had recorded my call with him. I learned a ton. I do really like him and the Gecko products in general but you cannot believe how much time two of us have spent trying to get these to work.
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[21:48:21] <nicko> I have the Granite drives...
[21:49:01] <nicko> not in any position to compare with anything but much more specced out drives like AB Ultra 3000's and Kollmorgen drives
[21:49:22] <nicko> which have a lot more development history behind them ...
[21:49:41] <nicko> I'm learning as I go with the granites
[21:50:48] <nicko> a few show stop moments where frustrating user interface and sparse manual issues made me resort to help from Granaite 'himself' (Tero)
[21:51:16] <nicko> but if you know drives in general you might be able to figure out these bit for yourself ;)
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[21:54:03] <Tom_itx> maybe a wiki is in order on them :=)
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[21:56:06] <grommit> The other person working with me already uses Granites in his mill
[21:59:06] <grommit> by the way, the one thing I think is silly on the granites is how they used sub-d connectors for power. What were they thinking?
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[22:15:30] <elmo40> how many wires in that cable are used? only 2? what could it handle... 2AMPS, max? does sound weird.
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[22:17:04] <jdhNC> I don't recall how much, but it was a lot more than I expected
[22:18:14] <jdhNC> AMP solder cup d-subs, 7.5amps
[22:18:49] <Tom_itx> different pins will change the rating as well
[22:21:51] <Tom_itx> there's probably half dozen different pins available for the mini-fit Jr plugs (atx psu)
[22:22:38] <Tom_itx> the housing is rated for 13A
[22:23:30] <Tom_itx> even that is rated to a specific pin
[22:29:19] <grommit> each pin can handle something like 1A so they use like 20 pins.
[22:33:46] <nicko> its hard to tell looking at the little 'interface' PCB you slot in the D-Sub connector
[22:34:01] <nicko> If I beeped it out I'd say all of them were used ...
[22:34:32] <grommit> Does someone make a d-sub to terminal block ckt board?
[22:34:53] <nicko> it's only the connector they use ... not the data cable type
[22:36:50] <nicko> photo on page 2 of this: http://www.granitedevices.fi/assets/files/VSD-E_GettingStarted.pdf
[22:38:44] <Tom_itx> meh, a breakout wouldn't be that hard to make
[22:40:07] <Tom_itx> http://tom-itx.dyndns.org:81/~webpage/temp/LM75/PPort_Brd_bottom.jpg
[22:40:11] <Tom_itx> one of several i've done
[22:48:36] <grommit> true enough
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[22:52:25] <nicko> I think this one has three layers and via's and all that stuff I dont know much about
[22:58:35] <Tom_itx> pretty simple board to require more than a couple layers
[22:59:25] <Jymmm> Tom_itx: easy for you to say =)
[23:00:07] <Tom_itx> just smoke and mirrors
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[23:06:56] <nicko> I wonder... if you wanted to extend your motor power cable ...
[23:07:18] <nicko> would you have to extend the 4 wires from the motor via some connector/connection
[23:07:31] <nicko> or could you get away with just using a parallel cable?
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