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[03:11:07] <Deejay> moin
[08:07:43] <tom_R2E3> general electrical question for someone more educated than me:
[08:08:27] <jthornton> we just ask the question around here
[08:08:28] <tom_R2E3> there are three bot contactors in my milling machine which turn the servo drives on and off. They work but they squeal horribly when energised. Is that normal?
[08:09:05] <jthornton> no, that is not normal
[08:09:14] <tom_R2E3> "bot" should say "big"
[08:09:22] <jthornton> are the coils AC or DC?
[08:09:30] <tom_R2E3> DC
[08:10:07] <jthornton> might check that trash is no in the contactor preventing them from going fully closed
[08:10:21] <tom_R2E3> OK
[08:10:29] <jthornton> and check that the rated current and voltage is at the coil
[08:11:25] <archivist> squeal form a DC coil may be an indication of a power supply problem
[08:11:30] <tom_R2E3> I didnt hear the machine running before I bought it. Originally it had a three phase transformer, then rectifier + caps to supply 100VDC to the drives
[08:12:07] <tom_R2E3> I replaced the 3ph transformer with a single phase one, and a load more capacitance
[08:12:35] <tom_R2E3> reused the original rectifier (well some of it)
[08:13:10] <tom_R2E3> and it supplys 100VDC. I dont have a scope so I cant see what the voltage ripple is like..
[08:13:44] <archivist> where about are you, as you are on the same ISP as me
[08:14:04] <tom_R2E3> Lincolnshire, UK
[08:14:35] <archivist> bit too far to drag a scope
[08:14:44] <archivist> Staffs
[08:15:05] <tom_R2E3> yeah
[08:15:13] <tom_R2E3> got several in my ebay watched list
[08:16:02] <tom_R2E3> I wonder if the AC ripple is making them buzz
[08:16:33] <archivist> if the noise is 100hz (cyles per sec)
[08:20:22] <tom_R2E3> its more like 4kHz
[08:20:40] <tom_R2E3> high pitch squeal
[08:24:49] <archivist> odd unless you are hearing servo switching frequency, are you sure you know the sound location
[08:26:13] <tom_R2E3> hmm, not certain
[08:26:35] <tom_R2E3> there are some transformers down there too I think
[08:26:51] <tom_R2E3> I'll go and have another look/listen
[08:47:05] <archivist> tom_R2E3, <steve_stallings> With the R2E3 Bridgeport controls, it is normal for the servo amplifiers to make a relatively loud squealin sound when energized.
[08:52:14] <tom_R2E3> ah
[08:52:42] <tom_R2E3> damn, was hoping to get rid of it, such an annoying noise!
[08:53:20] <tom_R2E3> incidently, the contactors are powered from a different transformer, they're actually 120 VAC
[09:08:00] <sivu> bottom part of the gantry done
[09:14:15] <CaptHindsight> sivu: rack and pinion?
[09:15:17] <sivu> ballscrew + 608 against steel pipe
[09:17:49] <ries> hey guys, I am trying to use axis-remote over ssh but it seems like that axis-remote isn't designed for this. That made me wonder: What is the typical usecase for axis-remote?
[09:26:43] <archivist> ssh? why would you need that
[09:32:00] <ries> archivist: I am writing a little g-code generator and I thought it would be nice to have a button 'Load in axis'
[09:32:40] <ries> so I am trying to figure out a way to accomplish this. This needs to work from over a local intranet
[09:33:16] <archivist> many have done it not sure ssh was needed
[09:37:46] <ries> sometimes I wish I knew python so I make enhancements to it.... Like adding a mini REST service to send a file over
[09:46:24] <cradek> tom_R2E3: I agree with steve_stallings; that machine is squealy and loud like that.
[09:52:00] <skunkworks> it is probably like 4khz pwm Frequency..
[09:56:33] <CaptHindsight> http://milwaukee.craigslist.org/tls/4167509523.html outdoor bandsaw
[10:01:55] <Tom_itx> ries, you seen JT-Shop's gcode generator?
[10:02:09] <ries> Tom_itx: I don't think so?
[10:02:46] <ries> Tom_itx: where can I find it?
[10:02:47] <Tom_itx> http://gnipsel.com/files/g-code-generator/
[10:04:36] <ries> Tom_itx: thanks.. let me see if I can run it
[10:05:07] <pcw_home> Fixed the Ethernet latency issue on my desktop
[10:05:08] <pcw_home> http://imagebin.org/284175
[10:05:10] <pcw_home> (7I76E running under Preemt-RT at 2 KHz)
[10:09:45] <ries> Tom_itx: my code does something similar I guess...
[10:10:01] <Tom_itx> just trying to save you repeating it
[10:13:52] <ries> Tom_itx: thanks for that.. my approach is a bit different though.. I can have multiple project and each project can consist of multiple operations
[10:15:31] <ries> I also have ag-code intepeter and visualiser so I can see what the generated g-code is looking like
[11:12:14] <tom_R2E3> Hi. Been having a play with PID on my squealing drives
[11:12:52] <tom_R2E3> Different values of P make interesting squealy noises
[11:14:15] <tom_R2E3> and f-error trace is really noisey, not a nice trace like the images on JT's tutorial
[11:34:05] <pcw_home> for velocity mode drives, most of the tuning is done with FF1
[11:51:53] <tom_R2E3> Hi PCW
[11:52:42] <tom_R2E3> is there a more relevant tutorial I could follow?
[11:56:58] <pcw_home> that one is appropriate for velocity mode drives
[11:57:23] <pcw_home> so should be basically relevant
[11:57:29] <IchGuckLive> hi all
[11:58:03] <pcw_home> Hi IchGuckLive
[11:58:35] <IchGuckLive> pcw_home: what a day 3plasmas are runig 150m of cable 4x1,5 300m of 2x0.5 and coils of small 0-.14 colored
[11:59:05] <IchGuckLive> all 7i76 on full motion
[11:59:30] <IchGuckLive> drom 9to5 4people
[11:59:35] <IchGuckLive> from
[12:00:02] <pcw_home> One thing I would change in the tutorial is the scaling (so PID terms are normalized)
[12:00:35] <pcw_home> Thats lot of wire, how big are the tables?
[12:00:48] <IchGuckLive> 3x2m
[12:01:15] <pcw_home> Pretty good size
[12:01:31] <IchGuckLive> im runing at 6m/min on 600mms²
[12:01:43] <IchGuckLive> thats good
[12:01:52] <IchGuckLive> 100steps per mm
[12:02:50] <pcw_home> dual drive gantry?
[12:03:35] <IchGuckLive> yes
[12:05:09] <pcw_home> how are you doing homing? (gantry homing seems a weak spot in linuxCNC now)
[12:05:28] <IchGuckLive> only one switch does not matter
[12:06:00] <IchGuckLive> ther is 5mm of space for the gantry to twist
[12:06:50] <pcw_home> Plasma is not terribly precise anyway I guess
[12:07:09] <IchGuckLive> agree 1mm is nothing on most shapes
[12:07:41] <pcw_home> Leadshine drives?
[12:07:55] <IchGuckLive> i got a poer test for 1hr and i got near 2mm different at 4500mm
[12:08:03] <IchGuckLive> yes 880A
[12:09:11] <pcw_home> The bigger ones
[12:09:28] <IchGuckLive> the 542 are not taken 80V
[12:09:44] <IchGuckLive> for this long liines you need more power
[12:24:57] <IchGuckLive> pcw_home: what size of screwdriver is requiered for the 7i76 3.5 terinals its not a EU size
[12:28:07] <Tom_itx> get a jewelers screwdriver set
[12:28:11] <Tom_itx> or one for eyeglasses
[12:28:24] <Tom_itx> RS or Radioshack should have them small enough
[12:28:43] <IchGuckLive> im searching on reichelt.de
[12:28:52] <Tom_itx> or make your own :)
[12:29:34] <Tom_itx> the one i use says it's 3/32"
[12:29:54] <Tom_itx> #4
[12:32:15] <Tom_itx> your site doesn't like english
[12:33:11] <IchGuckLive> ;-)
[12:33:34] <IchGuckLive> Tom_itx: in the top blue bar you can go EN
[12:35:01] <Tom_L> http://www.reichelt.de/Fine-Screwdrivers/TS-6N/3/index.html?&ACTION=3&LA=446&ARTICLE=21832&GROUPID=563&artnr=TS+6N&SEARCH=%234+screwdriver
[12:35:42] <Tom_itx> 3rd one from the right should do the trick
[12:35:55] <IchGuckLive> agree
[12:36:39] <Tom_itx> but then you'll have a couple extra to tighten your spectacles
[12:37:52] <Tom_itx> i also have a similar phillips set
[12:38:20] <Tom_itx> glued the case back to back
[12:48:48] <tjtr33> are these different or same ? SSI ( simple sensor interface ) SSI (Serial Synchronous Interface) ?
[12:49:17] <tjtr33> i asked wikipedia for SSI :(
[12:54:25] <pcw_home> different
[12:54:44] <tjtr33> thx
[12:56:46] <pcw_home> Encoder SSI is very simple: host sends out clock, encoder returns data
[12:56:47] <pcw_home> (no clocks for some timeout period resets encoder shift register logic)
[12:57:20] <pcw_home> so first clock from host latches current count
[12:57:51] <tjtr33> cool, i guess
http://en.wikipedia.org/wiki/Synchronous_Serial_Interface is whats implemented in Mesa libs , so is suited to renishaws magnetic rotary encoder AM4096
[13:01:03] <pcw_home> Should be (I wonder if thats a IC Haus part)
[13:02:02] <tjtr33> web sez owned by renishaw produced by RLS
[13:02:23] <tjtr33> http://www.rls.si/media/pdf/en/95a93b667afa49ae98ddb16157d82bee.pdf
[13:03:13] <pcw_home> I meant AustriaMicrosystems not IC Haus
[13:03:25] <Cylly> re @ home
[13:03:42] <pcw_home> note the AM part #
[13:07:03] <tjtr33> yep, never can tell who foundires these parts
[13:07:08] <tjtr33> foundries
[13:14:56] <IchGuckLive> BYE have a nice wekend its the last in 2013
[13:14:59] <IchGuckLive> ;-)
[15:11:38] <asah> hi all. how do I connect a pin to two signals? I have an input I want to visualize in a panel but also connect to another componant (I am working on my gear shifter)
[15:12:37] <asah> I have a pyvcp panel going which shows state of some leds. I want to take the input from the mesa board, connect it to the input of my comp, and also hook it into the led visualizer in my panel.
[15:16:15] <asah> in fact, why can't signals be plugged into pins?
[15:20:57] <asah> I see that many comps make a "state reflecting" output pin which enables the visualization of a particular incoming pin. Am I missing something or is this an architectural limitation I keep bumping against?
[16:29:37] <asah> skunkworks... got my python gearshifting comp to work.
[16:29:45] <asah> able to shift the back gear now!
[16:30:13] <asah> now to replicate for all three gears and package it up a bit for ease of use.
[16:51:08] <Deejay> gn8
[19:49:55] <terabyte-> http://farm6.staticflickr.com/5479/11614706124_0a242f85d4_k.jpg
