#linuxcnc | Logs for 2014-08-25

[02:09:48] <Deejay> moin
[02:12:03] <BellinganRoy> Ciao
[02:54:56] <starno> good price for a 30cmx40cm desktop CNC with a 800W watercooled spindle all axes using ball screws?
[03:04:43] <archivist> that depends how strong the desktop needs to be to carry it and its accuracy and machining capability
[03:08:53] <starno> archivist: can you elaborate? I am new to the scene
[03:10:23] <starno> archivist: thick aluminum frame design, is the accurace not dependent on the quality of the ballscrews? How is machining capability quantified?
[03:17:33] <archivist> a machine for milling steel is far heavier and stiffer than a machine for wood
[03:18:34] <archivist> some ballscrews are less good than others so price affects accuracy
[03:18:56] <archivist> rolled v ground ballscrew
[03:20:56] <starno> archivist: so do you just look at and make a subjective judgement or are there some specs on these kinds of qualities to look out for?
[03:21:01] <archivist> you can use a smaller machine and take very small cuts and take more time or use a stronger machine for faster heavier cuts
[03:22:00] <starno> Im looking to machine aluminum as the hardest material, 30x40 working area
[03:22:57] <starno> is a 800W spindle capable of cutting aluminum? assuming the frame is robust enough
[03:23:41] <archivist> sure
[03:24:40] <starno> I see some 500W options as well. Does the power relate to speed or does it also have an effect on the depth of cut possible?
[03:25:38] <archivist> it takes power to get high rpm and depth of cut and cut per tooth per rev
[03:26:50] <archivist> cut per tooth per rev is the root value that defines all the other values
[03:27:09] <starno> are there any disadvantages to using a high powered spindle? like if I am cutting plastic do I want to switch it out for a different spindle?
[03:27:36] <archivist> just set a sensible rpm
[03:27:47] <archivist> and use the right cutter and feed
[03:28:06] <starno> ok, so I want to go as high as I can on power on the spindle assuming I have the budget
[03:28:30] <archivist> the spindle power is only fully used when taking a large cut
[03:29:17] <archivist> often your cutter may be to small to utilise that power
[03:29:46] <starno> do you think the 500W might be more suitable for me?
[03:30:15] <starno> im looking to make parts no greater than 30-40mm in depth
[03:31:08] <archivist> width or length maybe I doubt you will be milling that deep
[03:31:35] <starno> i want a batch production style setup so speed is somewhat important, however I will most likely be using a 2mm bit
[03:32:29] <archivist> with a small bit you need high rpm to get productive, that uses a lot of the power
[03:32:44] <starno> ah, ok, thats good to know
[03:33:59] <starno> do you have any suggested readings or guides on the speeds, depth of cut, cut per tooth, etc.
[03:34:20] <archivist> with a flimsy machine on climb milling they can grab and snap the cutter, you need a stiff machine and ballscrew with no backlash
[03:34:46] <archivist> there are many online speed/feed calculators
[03:34:54] <starno> are T-screws more prone to backlash?
[03:35:06] <archivist> T ?
[03:35:15] <starno> trapezoidal
[03:35:37] <archivist> yes much worse
[03:35:45] <starno> ok
[03:36:11] <archivist> but you can remove backlash with some contrivance
[03:36:24] <starno> do you have any photos of your setup?
[03:36:58] <archivist> I have a fugly mill and a lathe
[03:38:19] <archivist> this is the mill before I changed one of the screws to ballscrew http://www.collection.archivist.info/archive/DJCPD/PD/2009/2009_05_21_cnc/IMG_0246.JPG
[03:42:56] <starno> this looks pretty amazing https://www.youtube.com/watch?v=G_UmhUjZhNo
[03:43:25] <starno> its funny after all that it cuts "EMC2" in a flat piece of wood
[03:44:45] <archivist> for some people it is all about the making of the machine, once they have it working they move on to make another machine
[03:46:57] <archivist> others modify the machine as needed
[03:48:04] <archivist> mine https://www.youtube.com/watch?v=adT8Dr5JZ4c
[04:00:26] <starno> im looking to machine some heatsinks
[04:00:49] <starno> Trying to find a good desktop machine for around $1k USD
[04:02:44] <Tom_itx> http://zero-divide.net/index.php?page=fswizard&shell_id=199&load_tool_id=27011
[04:04:25] <starno> Tom_itx: impressive, thanks
[04:04:45] <Tom_itx> http://www.onsrud.com/plusdocs/Doc/index.html?model.code=FeedSpeeds
[04:06:09] <Tom_itx> i should just have my bot post those like once a week or so
[04:10:50] <archivist> Tom_itx, or train my bot
[04:16:45] <archivist> !wench learn feeds is http://zero-divide.net/index.php?page=fswizard&shell_id=199&load_tool_id=27011 and http://www.onsrud.com/plusdocs/Doc/index.html?model.code=FeedSpeeds
[04:16:46] <the_wench> I have learned feeds is http://zero-divide.net/index.php?page=fswizard&shell_id=199&load_tool_id=27011 and http://www.onsrud.com/plusdocs/Doc/index.html?model.code=FeedSpeeds
[04:16:51] <archivist> feeds
[04:16:51] <the_wench> http://zero-divide.net/index.php?page=fswizard&shell_id=199&load_tool_id=27011 and http://www.onsrud.com/plusdocs/Doc/index.html?model.code=FeedSpeeds
[04:18:19] <archivist> !wench learn db is http://www.wench.archivist.info/index.php?chan=%23linuxcnc
[04:18:19] <the_wench> I have learned db is http://www.wench.archivist.info/index.php?chan=%23linuxcnc
[04:19:05] <archivist> time to go drive a steam engine
[04:20:28] <archivist> http://www.middleton-leawood.org.uk/index.html
[07:27:52] <kamakaze_> Hi! Is there anybody how can help me to setup Tonsen ts-3040c-h80 - my problem details is listed here: http://www.cnczone.com/forums/chinese-machines/138286-cnc-machine-ts-3040c-h80-2.html
[07:28:52] <kamakaze_> I have urgent problem because I have to move from Mach3 to linuxCNC and my machine don't move practically
[07:29:12] <jthornton> you might try posting on the forum... I never go to the zone too many ads to wade through
[07:29:42] <jdh> with mach3 to stepconf version 0.9 created by John Thornton
[07:29:53] <Jymmm> lol
[07:30:39] <Jymmm> I dont see any ads at all... yay ABP!!!
[07:30:40] <kamakaze_> I posted that problem to two forums I am using jthornton your script to convert settings
[07:31:54] <jthornton> the script does make some assumptions because mark3 does not have settings for drive timing IIRC
[07:32:46] <kamakaze_> ok - that might be reason - please help me to get that work - what I have to do that I can get timing correctly?
[07:33:37] <jthornton> is your drive listed here http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Stepper_Drive_Timing
[07:36:48] <kamakaze_> It looks that not... I don't remember it - box is create by DONGDA - it is one of these china models. Can I get driver name from driver info or is it nesessary to open box?
[07:36:58] <Jymmm> Whoa, my OEM750's have soem hella timing
[07:46:46] <kamakaze_> jthornton - do you have any quess what is my controller: http://linuxcnc.org/hardy/dapper/emc2/emc2/emc2/emc2/index.php/english/forum/9-installing-linuxcnc/24300-machine-parameter-conversion-from-mach3-to-emc2?start=40
[07:53:13] <kamakaze_> I opened box - controllers are tonsencnc's own model...
[07:53:19] <jthornton> I have no idea what you have, sorry
[07:53:39] <jthornton> open your config in stepconf and see what the drive timing is
[07:54:19] <jthornton> try a larger number like 20000 for timings
[07:54:52] * jthornton wanders off now
[07:56:51] <kamakaze_> there is screen shots for all my settings in forum post - step timing is 5000
[07:57:05] <kamakaze_> I will test 20000 what else I can try?
[07:58:06] <kamakaze_> what about step space? is is nesessary to change that too?
[08:26:00] <jdh> are you using a real parallel port or a USB device?
[08:30:32] <kamakaze_> I am using real parallel port
[08:31:02] <kamakaze_> My understanding is that it does't work at all with USB device, but I can be wrong
[08:31:57] <kamakaze_> I could find any differense (I used only axis test (is that right way to test) if I add step time from 5000 to 10000 or 20000
[08:32:03] <kamakaze_> what can be wrong?
[08:32:18] <jdh> got the right pins?
[08:32:34] <jdh> was it working with the mock3 config?
[08:32:35] <kamakaze_> please help me - I have to get this work - if anybody can get my device work today I will pay 50 dollar via paypayl immediately
[08:32:49] <kamakaze_> it works with mach3 perfectly
[08:32:50] <jdh> heh... pay for stuff is a mach3 deal, not here.
[08:33:16] <kamakaze_> I know - it looks that nobody is not answering in forum too :(
[08:34:00] <kamakaze_> mach3 suck - it too expensive I try to move now to free linux based system, but it looks that without support I can't do it
[08:34:00] <jdh> patience.
[08:34:05] <cpresser> kamakaze_: i would suggest you write your pinout down on a sheet of paper. then start from scratch with stepconf
[08:34:17] <cpresser> test one axis at a time
[08:34:27] <jdh> yep
[08:34:34] <kamakaze_> so you guest that pinions are wrong?
[08:34:56] <JT-Shop> kamakaze_, try 20000 for all 4 timings
[08:35:04] <kamakaze_> but I checked then from mach3 setup that they are same
[08:35:11] <cpresser> my guess is that something is wrong. cant tell for sure. so a clean start might be the best option
[08:35:56] <jdh> and stepconf by itself is pretty simple.
[08:36:12] <cpresser> most likely, that approach will be faster than tinkering around with the non-working config you have
[08:36:13] <jdh> make sure you get teh active high/low the same as your mach config.
[08:36:35] <kamakaze_> it is funny that it looks that nobody has same machine - I thought that this is best seller - cheap and work quite nicely
[08:36:53] <jdh> there are lots of them that look the same.
[08:36:56] <kamakaze_> I am quite sure about it jdh
[08:36:57] <JT-Shop> the converstion script should have gotten the pins and active high low correct
[08:37:12] <kamakaze_> I have to double check - thanks about this hint
[08:37:25] <kamakaze_> I think so
[08:37:33] <jdh> I have a chinese 6040 that took about 5 mins of stepconf time.
[08:37:57] <kamakaze_> what is your controller?
[08:38:53] <jdh> LinuxCNC
[08:39:54] <kamakaze_> pins are exactly same - damn - I am already quite hopeless - I would like get rid of Windows XP, but it looks that I can't :(
[08:45:09] <kamakaze_> any other ideas what I can try?
[08:45:54] <ktchk> kamakaze_: are you testing with stepconf?
[08:45:58] <cpresser> kamakaze_: i would suggest you write your pinout down on a sheet of paper. then start from scratch with stepconf
[08:48:37] <jdh> ^^^ what he said.
[08:49:16] <jdh> do you need IO other than step/dir? spindle speed control? limits? Drive enable?
[08:51:26] <kamakaze_> ktchk yes I testing in stepconf - I used axist test to test changed valued with axis test - are they valid aready in this step?
[08:56:18] <ktchk> kamakaze_: pin 17 amp enable must be set to un-use before the axis will move
[09:09:08] <kamakaze_> sorry where I can find that? Only pin17 settings what I found in xml was there two lines: <property name="pin17" type="string" value="xdir"/>
[09:09:11] <kamakaze_> <property name="pin17inv" type="bool" value="True"/>
[09:09:51] <ktchk> kamakaze_: stepconf
[09:10:28] <ktchk> kamakaze_: pinout table
[09:14:11] <kamakaze_> ktchk you was suggest to write down it - but where? I don't have any manual - only data what I have is working mach3 config and based on that it looks that all are same in linuxcnc
[09:14:52] <kamakaze_> so how I can know 'right' pins if these looks same than mach3 settings has
[09:15:09] <cpresser> kamakaze_: open the case, check with a multimeter
[09:16:25] <cpresser> it will help you a lot once you understand how everything is wired
[09:16:57] <ktchk> kamakaze_: run under application, cnc stepconf, stepper configuration wizard.
[09:17:59] <cpresser> with a multimeter you can also check if the amp-enable and direction pins are working as intended
[09:18:13] <kamakaze_> I can do that with multimiter, but for me it looks that just timing is wrong because my motors make sounds when I press x +/- or y+/-, but it just don't move
[09:18:50] <jdh> did you cahnge teh timing?
[09:18:54] <jdh> and try again?
[09:18:59] <cpresser> then open the datasheet of your drives. and check the timing
[09:19:01] <jdh> put 20k in for everything
[09:19:02] <kamakaze_> yes, but it looks that works totally same way
[09:20:24] <kamakaze_> I tested it now with everything 20000, but it sounds totally same - is sure that changes are in use without ending wizard first?
[09:21:34] <ktchk> kamakaze_: set everything end stepconf will generate config file then test again
[09:21:46] <kamakaze_> and one question - how I can know with multimiter is it step or direction?
[09:21:49] <cpresser> or: test within the wizard.
[09:22:10] <kamakaze_> so middle of wizard in axist test mode it don't have new settings yet?
[09:22:50] <ktchk> kamakaze_: dir is + or 0 step is pulsating
[09:23:22] <cpresser> http://www.linuxcnc.org/docs/html/config/stepconf.html (Section5 -> "Test this axis" button)
[09:23:27] <kamakaze_> by the way I found bug in stepconfig code in line 575 there is if self.units or axname == 'a': leadscrew = 1./leadscrew
[09:23:45] <kamakaze_> and in this my case this leadscrew is 0 for a axis
[09:24:02] <kamakaze_> so I changed it to if self.units and axname != 'a': leadscrew = 1./leadscrew if axname == 'a': leadscrew = 0
[09:24:15] <kamakaze_> I suppose that this can't do any harm?
[09:25:01] <kamakaze_> thanks ktchk - I will check them if this is my last hope to get that work
[09:25:22] <ktchk> kamakaze_: use stepper configuration wan check everything
[09:25:54] <ktchk> kamakaze_: configuration wizard
[09:26:57] <kamakaze_> I have oscilloscope too so I will check signals with it
[09:27:00] <kamakaze_> maybe it helps
[09:27:35] <kamakaze_> is it possible that everything is just fine in setting, but linuxcnc just don't work with my controller - it is same what I have in settings?
[09:27:48] <ktchk> kamakaze_: not if the config file is wrong
[09:39:54] <kamakaze_> One question more that if you guys check my configs in this post: http://linuxcnc.org/hardy/dapper/emc2/emc2/emc2/emc2/index.php/english/forum/9-installing-linuxcnc/24300-machine-parameter-conversion-from-mach3-to-emc2?start=40 - do you see any mistake if you compare mach3 and linuxCNC configs?
[09:40:41] <kamakaze_> I double checked before I started using oscilloscope to checking signal and I can't see any differencenses
[09:42:36] <lair82> Good Morning Guys, pcw_home you out there?
[09:43:01] <pcw_home> Yep
[09:45:32] <lair82> Hey, you had mentioned it in the past, and I never put 2 and 2 together in regards to using software vs hardware encoders. We run the 7i73 mpg card, and I have been using the software encoders. I realize now why I see the results I do with the slides acting erattically when spinning the mpg at a high rate of speed.
[09:46:28] <lair82> I want to convert over to the hardware counter in the 7i73, and had a few questions.
[09:46:52] <skunkworks> lair82, did you see rob fixed the pause issue you where having?
[09:49:07] <lair82> skunkworks, yes I did, I am updating another machine right now, and am working the bugs out one by one, that is on the list to try that out, and try out setting a tolerance to rerun some of those programs and I noticed it running way off of programmed course.
[09:50:34] <lair82> pcw_home, do I need to connect the A and B signals in my hal file or is that not necessary?
[09:50:35] <lair82> I didn't see any pins to connect to.
[09:53:07] <pcw_home> no you dont need any A or B signals or encoder components
[09:54:51] <lair82> Ok, then I need to modify in my INI file the "CONFIG = sserial_port_0=0000xxxx num_resolvers=6 num_pwmgens=6 num_3pwmgens=0 num_stepgens=0" line correct? to reflect using the hardware encoder.
[09:56:55] <pcw_home> yeah, what channel is your 7I73 on?
[09:58:22] <lair82> Channel 2
[09:58:30] <cpresser> kamakaze_: is your microstepping really set to 1?
[09:59:07] <pcw_home> well actually it doesnt matter, the encoders are always enabled
[10:03:24] <lair82> Ok, so for reference my hal should look something like this "net raw-counts hm2_5i23.0.7i73.0.2.enc0.rawcounts", " net raw-counts ilowpass.0.in"
[10:04:23] <pcw_home> In master, probably
[10:06:29] <lair82> Running 2.6.2, where or how do I find what the names should be, I saw in a post you had on the forum that "encoder name for sserial devices will change in LinuxCNC version 2.6"
[10:07:35] <pcw_home> just run halcmd show pin
[10:08:26] <lair82> Ok, going to go see how much trouble I can get in.
[11:57:22] * cpresser could use some help for tuning a PID loop: http://imgur.com/1yz5EiK
[11:57:41] <cpresser> i want to reduce the overshoot. any hints on which parameter i have to change?
[11:58:05] <cpresser> so far i have P=10, I=0.05 D=400
[11:58:17] <lair82> pcw_home That thing jogs like a million bucks now that I have it hooked to the hardware encoder.
[12:00:01] <cpresser> The scale is degreeCelius. Its supposed to be a reflow profile :)
[12:10:10] <pcw_home> lair82: thats what they are there for :-)
[12:10:34] <lair82> Thank You
[12:12:12] <pcw_home> Welcome
[12:28:13] <Tom_itx> cpresser that profile doesn't look so bad
[12:29:10] <Tom_itx> is that a commercial oven or homebrew?
[12:29:18] <cpresser> diy
[12:29:25] <Tom_itx> awesome
[12:29:32] <Tom_itx> i did one using an avr
[12:29:42] <Tom_itx> works good but i don't solder ROHS
[12:29:45] <cpresser> 20€ oven from ebay, +Thermocoupe +DMX-Dimmerpack for power-control
[12:30:02] <kfoltman> cpresser: which oven?
[12:30:11] <Tom_itx> http://tom-itx.ddns01.com:81/~webpage/toaster_oven/toaster_oven_index.php
[12:30:14] <Tom_itx> there's mine
[12:30:28] <Tom_itx> i used a PT100 because they're easy to interface and pretty linear
[12:30:28] <cpresser> http://cgi.ebay.de/ws/eBayISAPI.dll?ViewItem&item=161096945100&ssPageName=ADME:X:DERP:DE:1123
[12:30:42] <cpresser> digital thermocouple interface: http://cgi.ebay.de/ws/eBayISAPI.dll?ViewItem&item=321449094041&ssPageName=ADME:X:DERP:DE:1123
[12:31:04] <Tom_itx> tip: i used the timer for an on off switch
[12:31:10] <cpresser> very nice, Tom_itx. i like your build
[12:31:11] <Tom_itx> just set it all the way on
[12:31:30] <Tom_itx> i insulated mine a bit which helped the ramp speed
[12:31:56] <cpresser> what material did you use for insulation?
[12:32:14] <Tom_itx> just owens corning home insul :)
[12:32:24] <Tom_itx> leftover
[12:32:49] <Tom_itx> and i got some of the high temp braid for the sensor wire from a local motor winding shop
[12:32:59] <Tom_itx> the white braided wire
[12:33:23] <cpresser> fortuntaley that is not an issue with thermocouple. you get them all wired up with glass-braid insulation
[12:33:27] <Tom_itx> yup
[12:34:10] <Tom_itx> http://tom-itx.ddns01.com:81/~webpage/boards/reflow/cooking.JPG
[12:34:12] <Tom_itx> http://tom-itx.ddns01.com:81/~webpage/boards/reflow/cooling.jpg
[12:34:15] <Tom_itx> in action
[12:34:38] <Tom_itx> i added the mesh so the boards would sit on the tray better
[12:35:04] <cpresser> my biggest problem so far is the solder paste.
[12:35:15] <Tom_itx> why?
[12:35:21] <cpresser> its to old i guess
[12:35:23] <Tom_itx> i get mine from china for like $3
[12:35:33] <Tom_itx> i milk mine for as long as i can with iso
[12:35:45] <Tom_itx> doesn't work quite as good but it does ok
[12:35:57] <cpresser> its to thick, doesnt distribute nicely. and the parts dont really stick in the paste.
[12:36:11] <Tom_itx> yeah
[12:36:26] <Tom_itx> i get it cheap enough i just toss it after it sits so long
[12:36:34] <Tom_itx> keep it in the frig it will last longer
[12:36:44] * cpresser just ordered new paste. ill try again after it arrives
[12:38:31] <Tom_itx> http://www.dx.com/s/lodestar+solder+paste
[12:38:36] <Tom_itx> that's what i've been using
[12:38:53] <Tom_itx> seems i may have to find something else if they don't restock
[12:40:19] <Tom_itx> cpresser, are you using a stencil or applying with a syringe?
[12:40:33] <cpresser> stencil. laser-cut mylar
[12:40:47] <cpresser> next time, ill get a stainless-steel stencil :)
[12:40:49] <Tom_itx> yeah there's a guy here that laser cuts kapton
[12:40:57] <Tom_itx> they work pretty good
[12:41:01] * cpresser cant show pics of the board, its 'secret' :/
[12:41:30] <Tom_itx> http://tom-itx.ddns01.com:81/~webpage/boards/USBTiny_Mkii/Stencils/stencil_form3.jpg
[12:41:38] <cpresser> but it features a QFP-100 package. with 0.5mm pitch. thats really small for a low quality stencil like mine
[12:41:39] <Tom_itx> i cut pockets in some plexiglas for the boards
[12:41:49] <Tom_itx> yeah
[12:42:30] <Tom_itx> ^^ makes stencil alignment easy
[12:43:04] <cpresser> actually, i did the same. lasercut 1.5mm acrylic. so the PCB has a thight fit :)
[12:43:17] <Tom_itx> qfn is pretty fine for plastic stencils
[12:44:30] <Jymmm> qfn???
[12:44:42] <cpresser> Quad-Flat-NoLeads
[12:44:56] <Jymmm> ok, nfc, but ok =)
[12:45:00] <cpresser> its really PITA when doing manually.
[12:45:26] <Tom_itx> http://tom-itx.ddns01.com:81/~webpage/boards/atmega32u4/atmega32u4_1.jpg
[12:45:28] <Tom_itx> agreed
[12:45:46] <Tom_itx> i should have taken the pic after i cleaned the flux off
[13:02:29] <Loetmichel> hmm
[13:02:42] <Loetmichel> i solder qfbn by hand with the soldering iron
[13:03:05] <Loetmichel> works well if you extend the pads a bit to give you something the solderin iron can touch
[13:04:46] <jdh> flux + drag teh solder/iron across? or one at a time?
[13:08:26] <Loetmichel> first second, second first, drawing away any excess solder ;-)
[13:08:29] <cpresser> flux + flux + flux. hotair it into place (self-aligning via the power-pad), then drag-solder the pins
[13:09:11] <cpresser> but that only works if there are vias in the power-pad area
[13:11:14] <Loetmichel> like this, just wihtout the pins... and yes, that chip survived that torture although it was a pic: http://www.cyrom.org/MC/entloet2.wmv
[13:20:57] <jasen_> I am planing to use this servo with 1 and 1,2kw servos at 220v
[14:18:29] <archivist> a project http://www.ebay.co.uk/itm/Bridgeport-412-cnc-machining-centre-Heidenhain-TNC2500-vmc-milling-machine-/400762924986
[14:19:57] <CaptHindsight> looks like a deal for somebody
[14:29:02] * JT-Shop makes some 6061 Tee nuts for the plasma table
[14:56:00] <Tom_itx> JT-Shop enjoying this nice cool breeze?
[14:57:19] <Tom_itx> 97F
[14:58:36] <JT-Shop> 76F in the shop
[14:59:01] <alexchally_cnc> is there a good guide for using the halscope to tune your servos?
[14:59:10] <JT-Shop> only 93F outside with 50% humidity here
[14:59:15] <JT-Shop> yes there is
[14:59:30] <alexchally_cnc> and for setting proper acceleration values?
[14:59:30] <JT-Shop> well I don't know how good it is
[14:59:40] <JT-Shop> yea
[14:59:40] <alexchally_cnc> i have not been able to find anything that is nice and concise
[14:59:54] <JT-Shop> have you looked at the one on my web site?
[14:59:56] <alexchally_cnc> but maybe my google fu is not up to snuff today
[15:00:04] <alexchally_cnc> JT-Shop, link plz?
[15:00:09] <JT-Shop> gnipsel.com
[15:00:17] <JT-Shop> look in the LinuxCNC section
[15:01:04] <alexchally_cnc> JT-Shop, that is just about perfect, many thanks!
[15:01:24] <JT-Shop> your welcome
[15:01:38] <Tom_itx> JT-Shop, what are you doing to your plasma table?
[15:01:38] * JT-Shop might even get the plasma back together today YEA!
[15:01:40] <Tom_itx> rebuilding it?
[15:03:19] <JT-Shop> aye, rebuilding the X and Z axes
[15:03:43] <JT-Shop> making them lighter and replacing the slide bearings
[15:03:52] <Tom_itx> were they binding or something?
[15:04:14] <JT-Shop> loose
[15:04:28] <JT-Shop> so it chattered on direction reversal
[16:12:45] <Deejay> gn8
[16:31:52] <JT-Shop> plasma back together YEA!
[16:51:06] * JT-Shop moves back to the dozer joystick repair project
[17:17:02] <zeeshan|2> how do you clean an optical flat
[17:18:01] <CaptHindsight> zeeshan|2: whats on it?
[17:18:08] <zeeshan|2> what do you mean
[17:18:28] <CaptHindsight> type of contamination
[17:18:31] <zeeshan|2> dust
[17:18:54] <roycroft> hey folks
[17:19:06] <roycroft> i'm getting back to my cnc project after a prolonged hiatus
[17:19:15] <CaptHindsight> zeeshan|2: http://www.thorlabs.com/tutorials.cfm?tabID=26066
[17:19:58] <roycroft> i realised that a cnc conversion of my mini-mill would not be enough gain for me due to capacity issues, and i have other projects that makes a router more appropriate for my first cnc machine
[17:20:18] <zeeshan|2> so basically
[17:20:19] <zeeshan|2> optical soap
[17:20:23] <zeeshan|2> and distilled water and then air blow it
[17:20:29] <roycroft> but that added its own set of issues, and the primary one that has me stuck on the design is the drive train
[17:20:42] <roycroft> i want to be able to mill stock up to 65x100cm
[17:20:53] <roycroft> it will definitely be a moving gantry machine
[17:21:01] <roycroft> the question is: r&p or ball screw?
[17:21:12] <zeeshan|2> thats a tiny piece to mill
[17:21:19] <roycroft> cm, not mm
[17:21:50] <zeeshan|2> 25.5 " by 39.4"
[17:21:53] <roycroft> the online "discussions" tend to comprise mostly of religious camps
[17:21:55] <CaptHindsight> roycroft: up to you, based on budget, resourcefulness, etc etc
[17:21:58] <zeeshan|2> so basically 1 ft by 3 ft
[17:21:59] <roycroft> with people defending their religion
[17:22:06] <roycroft> 2'x3'
[17:22:12] <zeeshan|2> typo
[17:22:13] <zeeshan|2> 2
[17:22:21] <roycroft> r&p makes sense to me
[17:22:26] <zeeshan|2> what type of cutter head
[17:22:30] <roycroft> but i'm having a hard time getting a realistic concept of how accurate it can be
[17:22:39] <roycroft> irrelevant at the moment :)
[17:22:43] <zeeshan|2> no
[17:22:45] <zeeshan|2> that's very relevant
[17:22:51] <CaptHindsight> Jesus (my gardener) feels either is possible
[17:23:04] <zeeshan|2> if you're sticking a plasma on it it'll have like 20 thou tolerance.
[17:23:07] <roycroft> i may use different cutter heads for different projects
[17:23:13] <zeeshan|2> so whats the point of a ball screw..
[17:23:21] <roycroft> i'll probably use a high speed spindle at first
[17:23:22] <roycroft> so
[17:23:26] <roycroft> if you would let me finish
[17:23:37] <roycroft> i would like to build a machine that can hold 0.005" accuracy
[17:23:37] <zeeshan|2> roycroft: to give you an idea, rack and pinion is used within dial indicators.
[17:23:48] <zeeshan|2> so they can be very accurate, depending on the mechansim involved.
[17:23:50] <roycroft> right
[17:24:06] <roycroft> am i likely to find a rack in that size that's accurate enough?
[17:24:14] <roycroft> this is what i am not getting a good sense of
[17:24:15] <zeeshan|2> no
[17:24:16] <zeeshan|2> not for cheap
[17:24:28] <CaptHindsight> roycroft: either can hold that tolerance if designed and assembled properly
[17:24:42] <zeeshan|2> yet you can run some cheap ball screws from linearmotionbearings2008
[17:24:45] <roycroft> i don't have the means of favricating hte rack
[17:24:50] <zeeshan|2> for like 200$ for your x and y.
[17:24:54] <roycroft> i would have to purchase it
[17:24:57] <roycroft> so:
[17:25:14] <roycroft> could i get a rack with that tolerance for less than a ball screw?
[17:25:24] <roycroft> the pinion should be easy to get
[17:25:42] <roycroft> over a ~1m length, is a ball screw going to whip around too much?
[17:25:47] <roycroft> that's my concern about the ball screw
[17:26:22] <zeeshan|2> my lathe's ball screw is 44" long
[17:26:29] <zeeshan|2> doesnt "whip" around
[17:26:33] <roycroft> and for reference, i'm not going to say that money is no object, because it is
[17:26:55] <roycroft> does your lathe's ball screw turn at 200cm/minute?
[17:27:19] <zeeshan|2> 100 inches per minute
[17:27:25] <roycroft> anyway, money is a consideration, and i want to do this as economically as possible
[17:27:28] <roycroft> but i want to do it well
[17:27:36] <zeeshan|2> 254 cm/min..
[17:27:49] <zeeshan|2> ive had it up to 200ipm
[17:27:49] <roycroft> i.e. i don't want to take short cuts that will impeded accuracy or other performance parameters
[17:27:51] <roycroft> ok
[17:27:51] <zeeshan|2> but dont need those speeds
[17:28:06] <zeeshan|2> roycroft: for me money was the #1 priority
[17:28:15] <zeeshan|2> these chinese ball screws are so cheapo
[17:28:16] <roycroft> the r&p people tend to claim bhat ball screws whip around too much at high speed
[17:28:24] <zeeshan|2> out of the box, mine had like 3 thou backlash
[17:28:42] <roycroft> the ball screw people tend to claim that r&p cannot be accurate and has heaps of inherent backlash
[17:28:49] <CaptHindsight> http://machinedesign.com/archive/comparing-performance-and-efficiency-linear-motors-ball-screws-and-rack-and-pinion-drives
[17:28:55] <roycroft> nobody seems to want to produce good numbers
[17:29:01] <zeeshan|2> CaptHindsight: i love machinedesign.com
[17:29:03] <zeeshan|2> thanks to you
[17:29:07] <zeeshan|2> theres no bullshit on that website
[17:29:13] <CaptHindsight> http://machinedesign.com/linear-motion/comparing-rack-and-pinion-sets-other-options
[17:29:27] <zeeshan|2> i dont agree with those costs
[17:29:33] <zeeshan|2> those are not accounting for chinese mad ball screws!
[17:29:33] <zeeshan|2> :P
[17:29:42] <CaptHindsight> http://machinedesign.com/linear-motion/go-long-pros-and-cons-rack-and-pinion-systems
[17:29:42] <roycroft> thanks, capthindsight - i hadn't run across that particular article
[17:30:59] <roycroft> what's the diameter of your ball screw that can go 100ipm?
[17:31:11] <zeeshan|2> 25mm
[17:31:19] <roycroft> ok, that's bigger than the average one
[17:31:24] <roycroft> perhaps that's why
[17:31:32] <roycroft> bigger is not a problem
[17:31:36] <CaptHindsight> http://www.youtube.com/playlist?list=PL3D4EECEFAA99D9BE Lecture Series on Design of Machine Elements
[17:31:36] <roycroft> it just means a bigger motor
[17:32:11] <zeeshan|2> CaptHindsight: i cant wait to for my graduate glass
[17:32:14] <roycroft> groovy
[17:32:18] <roycroft> videos too!
[17:32:24] * roycroft will have to make some popcorn
[17:32:56] <roycroft> i shall likely design much of the machine with 80/20 extrusions
[17:32:58] <zeeshan|2> 2-D and 3-D analyses of stresses and strains. Principal stresses and maximum shear stress. Differential equations of equilibrium, compatibility conditions. Bending of unsymmetrical members. Shear centre. Shearing stresses due to bending in thin-walled open and closed members. Torsion of closed and open sections, warping, non-uniform torsion and warping stresses. Theory of plates- Rectangular and c
[17:32:59] <zeeshan|2> :D
[17:33:06] <zeeshan|2> some is review
[17:33:09] <zeeshan|2> a lot of new
[17:33:16] <zeeshan|2> circular plates problems. Buckling of elastic columns. Flexural-Torsional buckling of beams. Axial-torsional buckling of columns. Plate buckling (local buckling), shear of buckling of plates.
[17:34:41] <CaptHindsight> with Ich gone I'm the new Mr Typo here :)
[17:34:49] <roycroft> no worries
[17:34:54] <roycroft> i'm another mr typo
[17:34:59] <roycroft> we can compete to see who is worse
[17:39:49] <CaptHindsight> the same basic machine design questions come up in here all the time, it's not a problem unless they have spent too much time in reprap before studying some basic machine design :)
[17:40:16] <CaptHindsight> zeeshan|2: how many lecture hours on average did you have per class per semester?
[17:40:27] <CaptHindsight> on engineering
[17:41:16] <zeeshan|2> for undergrad about 160-180 hours per class
[17:41:26] <zeeshan|2> 16 weeks, 3 hours per week
[17:41:38] <zeeshan|2> er
[17:41:41] <zeeshan|2> im on crack. lol
[17:41:54] <zeeshan|2> so 48-60 hours
[17:42:00] <zeeshan|2> not 160-180.
[17:42:20] <zeeshan|2> grad courses are like 50
[17:42:44] <zeeshan|2> the thing is once you account how much time you spend on projects, and labs, and tutorials, its close to 160 hours
[17:43:11] <zeeshan|2> like for math, every week 3 hours lec, 1 hour tutorial, about 5-6 hours of hw
[17:43:21] <roycroft> http://www.ebay.com/itm/Ballscrew-2505-1710mm-Diameter-25mm-Pitch-5mm-L-1710mm-end-machined-ballnut-/121210868206?pt=LH_DefaultDomain_0&hash=item1c38bb11ee
[17:43:27] <roycroft> so is that going to be a crappy ball screw?
[17:43:34] <zeeshan|2> no
[17:43:36] <zeeshan|2> but thats overpriced
[17:43:53] <zeeshan|2> where are you located
[17:43:58] <roycroft> west coast of the us
[17:45:39] <zeeshan|2> hm
[17:45:53] <CaptHindsight> wow http://ocw.mit.edu/courses/audio-video-courses/ MIT OpenCourseWare
[17:46:12] <zeeshan|2> roycroft: i take that back
[17:46:16] <zeeshan|2> thats a good price
[17:46:29] <zeeshan|2> i paid 135$ for the ball screw
[17:46:35] <zeeshan|2> but 80bux in shipping
[17:47:00] <zeeshan|2> roycroft: if you want to really use that ball screw
[17:47:04] <zeeshan|2> take my advice and get an extra ball nut.
[17:47:05] <roycroft> the one i pointed to has free shipping
[17:47:15] <zeeshan|2> that way you can eliminate all the backlash
[17:47:21] <zeeshan|2> unless 3 thou backlash is acceptable
[17:47:23] <roycroft> just install them back to back?
[17:47:35] <roycroft> 0 backlash would be better
[17:47:55] <roycroft> because i'm sure there will be other places to introduce some error
[17:47:59] <roycroft> and i still want to hold 0.005"
[17:48:33] <roycroft> i'm still in the early design stage
[17:48:38] <roycroft> i'm not buying anything right now
[17:48:58] <roycroft> keep in mind that 10 minutes ago i was asking about r&p vs. ball screw
[17:49:26] <roycroft> and i'm still not 100% decided on either, but if the ball screw isn't going to have a whipping problem i would lean towards that
[17:54:05] <roycroft> well thanks for the input
[17:54:17] <roycroft> i'm going on holidays for a few days
[17:54:21] <roycroft> i have some things to ponder now
[17:54:45] <CaptHindsight> roycroft: what are you going to cut with it?
[17:55:03] <roycroft> mostly wood, some aluminium, some brass
[17:55:16] <roycroft> i can go slow on the metals
[17:55:48] <roycroft> on the wooden parts, though, i'll want to push it - time is money
[17:57:25] <zeeshan|2> roycroft: yes back to back
[17:58:14] <CaptHindsight> you're not asking for much res
[17:58:29] <roycroft> 0.001" would be nice
[17:58:33] <CaptHindsight> you're on the edge of using a good belt drive
[17:58:34] <roycroft> but i don't think it's necessary for now at least
[17:58:46] <roycroft> 0.005" will do almost everything i want for now
[17:58:52] <roycroft> so i thought it a good design parameter
[17:59:23] <CaptHindsight> http://www.ebay.com/itm/Yaskawa-STF35230M-AC1L-BDB-Servo-Linear-Motor-57-25-Travel-Length-Encoder-/170987551281 if you want 0.0002 :)
[18:00:02] <roycroft> sure, because wood will swell up more than 0.0002" when the humidity changes :P
[18:00:38] <CaptHindsight> you mean you don't have a temp and humidity controlled shop?
[18:00:47] <roycroft> that does not matter
[18:00:57] <roycroft> most parts eventually escape the shop and head out into the wild
[18:01:38] <roycroft> for what i'm doing right now, stepper motors will be fine i think
[18:02:03] <CaptHindsight> yes, fine
[18:02:27] <CaptHindsight> if you can stand the noise :)
[18:02:38] <roycroft> 1. earplugs
[18:02:41] <roycroft> 2. go somewhere else
[18:02:46] <roycroft> two easy solutions :)
[18:03:05] <roycroft> something tells me the spindle motor will make more noise than the stepper motors
[18:03:19] <zeeshan|2> ^ agree
[18:03:25] <CaptHindsight> roycroft: do you mostly cut plywood?
[18:03:33] <roycroft> i'll likely almost never cut plywood
[18:03:37] <roycroft> mdf or hardwood
[18:03:46] * roycroft does not like plywood
[18:04:07] <roycroft> that baltic birch stuff is ok for making shop fixtures/jigs
[18:04:16] <roycroft> the domestic stuff is all shite
[18:04:39] <roycroft> it's ok for roof decking, i suppose
[18:05:09] <zeeshan|2> https://www.youtube.com/watch?v=bC13xRoQaqc&list=UUy-Z-COl0WvPmSLXMOvtedg
[18:05:14] <zeeshan|2> all i hear is my damn spindle
[18:05:48] <zeeshan|2> lol ijust noticed
[18:05:57] <zeeshan|2> at :43 i got hit by a chip right into the camera
[18:05:57] <zeeshan|2> =/
[18:06:28] <CaptHindsight> zeeshan|2: whats the top spindle speed?
[18:06:33] <zeeshan|2> 1800 rpm
[18:07:32] <CaptHindsight> zeeshan|2: what did you use for the spindle motor?
[18:08:15] <zeeshan|2> a motor that weighs more than me :(
[18:08:23] <zeeshan|2> weg 3 hp cast iron
[18:08:25] <zeeshan|2> 3 phase
[18:08:37] <zeeshan|2> it weighs like 140lb
[18:09:07] <zeeshan|2> http://i.imgur.com/zOgYeo2.jpg
[18:09:11] <zeeshan|2> you can kind of see it here
[18:10:23] <CaptHindsight> busted https://www.youtube.com/watch?v=rHgy8RzTUvE&list=UUy-Z-COl0WvPmSLXMOvtedg
[18:10:54] <zeeshan|2> CaptHindsight: that was the first and last time i used mach
[18:10:56] <zeeshan|2> hahaha
[18:11:04] <zeeshan|2> i quickly realized that its poop
[18:11:26] <CaptHindsight> I have to take it off something as well
[18:11:30] <CaptHindsight> it came with it
[18:11:55] <CaptHindsight> made me hit the table twice
[18:12:00] <zeeshan|2> lol
[18:12:21] <zeeshan|2> it took me 4 days to write the driver for the vfd
[18:12:26] <zeeshan|2> and integrate it into linuxcnc
[18:12:32] <zeeshan|2> i bet thats highly impossible with mach
[18:13:48] <CaptHindsight> some people like it since they just configure it with some graphical tools
[18:13:59] <zeeshan|2> hm by with stepconf
[18:14:05] <zeeshan|2> you're up and running pretty quick
[18:20:17] <CaptHindsight> http://www.ebay.com/itm/Matsuura-1000V-DC3-3-Axis-Twin-Swindle-CNC-Verticle-Machining-Center-/191297006223 $4,850.00 or offer
[18:21:29] <CaptHindsight> zeeshan|2: get this for me :) http://www.ebay.com/itm/HYUNDAI-HIT-18S-TURNING-CENTER-CNC-LATHE/191296002603
[18:24:08] <zeeshan|2> wow
[18:24:10] <zeeshan|2> thats so close to me
[18:24:28] <CaptHindsight> you can even use it for a while before i pick it up :)
[18:24:38] <zeeshan|2> i should move my electronics
[18:24:39] <zeeshan|2> to that machine
[18:24:40] <zeeshan|2> :p
[18:24:46] <CaptHindsight> yeah
[18:24:51] <CaptHindsight> check it out
[18:25:07] <zeeshan|2> distance between centers
[18:25:08] <zeeshan|2> 25"
[18:25:11] <zeeshan|2> it weighs 10,500lb
[18:25:17] <zeeshan|2> my foundation will shift with that in my garage
[18:25:19] <zeeshan|2> lol
[18:25:36] <CaptHindsight> http://www.ebay.com/itm/KITAMURA-Mycenter-2-Vertical-CNC-FOR-PARTS-ONLY-/321483904734 No Spindle but only $1725 or best
[18:25:52] <zeeshan|2> jpolin
[18:25:56] <zeeshan|2> thats where the tornado hit in 2011
[18:25:59] <CaptHindsight> near JT
[18:26:05] <zeeshan|2> dude
[18:26:08] <zeeshan|2> wehy did you post this lathe
[18:26:09] <zeeshan|2> :(
[18:26:11] <zeeshan|2> now i want to get it
[18:26:18] <CaptHindsight> sorry
[18:26:41] <zeeshan|2> according to that ebay thing
[18:26:54] <zeeshan|2> it says 8.75 ft long
[18:26:59] <zeeshan|2> i could fit that in my garage easily
[18:27:06] <CaptHindsight> 5 days left to bid, I wonder what it will climb to?
[18:27:15] <zeeshan|2> at least 3-4k
[18:27:17] <zeeshan|2> i'd think..
[18:28:06] <CaptHindsight> 20HP spindle motor, how much power on the pole by you? :)
[18:28:13] <zeeshan|2> haha
[18:28:18] <zeeshan|2> id need to put my 3hp motor on there
[18:28:34] <zeeshan|2> ill stick to my lathe :]
[18:29:05] <zeeshan|2> if i can find a cnc busted mill for 2k
[18:29:10] <zeeshan|2> ill definitely sell my bridgeport clone
[18:29:16] <CaptHindsight> from 1995
[18:29:18] <zeeshan|2> locally that is
[18:29:25] <JT-Shop> makes you wonder what happened to the spindle
[18:29:48] <JT-Shop> yuck drives are gone too
[18:30:48] <CaptHindsight> maybe it was the spare machine
[18:34:17] <chally_> does anyone know where I can find a Mastercam x4 post processor that will output code for a 2 axis mill?
[18:34:26] <chally_> I only have x and y available right now
[18:34:36] <zeeshan|2> i only wrote one for a lathe :P
[18:34:39] <zeeshan|2> x7
[18:35:49] <CaptHindsight> http://www.ebay.com/itm/Bridgeport-CNC-Vertical-Machining-Center-Heidenhain-TNC-151-/321499461076 US $1,625.00
[18:36:18] <CaptHindsight> http://www.ebay.com/itm/SIP-4000-4-Axis-CNC-Machining-Center-Drill-Mill-Horizontal-Boring-GE-Fanuc-15-M/201152590276 $999.99
[18:38:21] <JT-Shop> https://www.youtube.com/watch?v=YyQi-1Z2tN8
[18:38:22] <CaptHindsight> http://www.ebay.com/itm/bridgeport-CNC-/301218406125 $1,000.00
[18:38:58] <JT-Shop> CaptHindsight, your evil... you know I can't resist much LOL
[18:39:17] <CaptHindsight> ok, no more posts
[18:40:33] <CaptHindsight> just trying to match these nice machines with good homes
[18:40:54] <cpresser> search me one in europe plz :)
[18:41:27] <CaptHindsight> cpresser: did you see the one Archivist posted in the UK?
[18:41:45] <CaptHindsight> http://www.ebay.co.uk/itm/Bridgeport-412-cnc-machining-centre-Heidenhain-TNC2500-vmc-milling-machine-/400762924986
[18:42:36] <JT-Shop> that's ok, I
[18:42:41] <JT-Shop> m burned out for today
[18:43:07] <JT-Shop> say goodnight Gracie
[18:43:12] <CaptHindsight> heh
[18:43:20] <CaptHindsight> it's still funny
[18:45:10] <CaptHindsight> http://www.ebay.com/itm/CNC-vertical-milling-Machine-Hitachi-Seiki-/321501634510 comes with three spare drives "We only used the machine for miling plastic parts and no longer need it"
[18:45:41] <CaptHindsight> that is the equivalent of the "only driven by a little old lady on Sundays"
[18:46:02] <CaptHindsight> 25 position auto tool changer
[18:46:36] <SpeedEvil> GRP is plastic too
[18:47:26] <CaptHindsight> http://i.ebayimg.com/00/s/MTIwMFgxNjAw/z/QS0AAOxyNThTdlVZ/$_57.JPG what taper?
[18:59:08] <CaptHindsight> cpresser: what do these sell for used there? http://chicago.craigslist.org/nwc/hvo/4624610465.html
[18:59:27] <CaptHindsight> Deckel KF12
[18:59:36] <cpresser> i dont know that model
[19:00:01] <cpresser> a lot of Deckel FP1 or FP2 are on ebay around here
[19:00:22] <cpresser> they sell for ~2000€ when in average confition
[19:12:27] <XXCoder> CaptHindsight: thats odd
[19:12:37] <XXCoder> two platforms and mill chucks?
[19:12:50] * cpresser will check out this one: http://www.ebay.de/itm/Drehmaschine-Drehbank-GEMA-LZ-160-/131272277471?pt=Industriemaschinen&hash=item1e906ffddf
[19:13:12] <cpresser> its close to my home. only 30min drive to take a look at it
[19:13:36] <XXCoder> interesting. https://seattle.craigslist.org/skc/hvo/4636702554.html
[19:18:02] <CaptHindsight> cpresser: looks good, my German is too rusty to help search
[19:18:37] <cpresser> i need to look for machines that are close by. because transport is an issue
[19:18:49] <cpresser> thats why i cant buy machines from great britain :)
[19:26:39] <CaptHindsight> cpresser: I see lots of brands like this that I never see in the US http://www.ebay.de/itm/DREHBANK-DREHMASCHINE-VON-WEIPERT-IDEAL-FUR-JEDEN-SCHLOSSERBETRIEB-/171416812914
[19:28:04] <cpresser> thats a pre-war model. 1939
[19:34:01] <CaptHindsight> Drehmaschine = Lathe, but literal translation is Torque Machine, interesting
[19:34:31] <cpresser> literally, it would be 'Turn Machine'
[19:35:07] <cpresser> its also the verb used. turning == drehen
[19:36:21] <CaptHindsight> torque = Drehmoment, ok
[19:37:47] <cpresser> we also call it 'Drehbank' which would translate to 'Turning Bench'
[19:38:09] <CaptHindsight> and a milling machine is a Fräse?
[19:40:28] <cpresser> yes
[19:41:25] <cpresser> an interesting fact: we dont have such words as gantry or kneemill do distuingish between different types
[19:43:01] <CaptHindsight> cpresser: are you working the late shift today?
[19:43:53] <cpresser> i always work the late shift. because i am to lazy to get up in the mornign :P
[19:44:36] <cpresser> but i am heading home now. 2:30AM is enoght for today
[19:44:40] <cpresser> gn8
[21:11:50] <anarchos2> so i'm thinking of ways to automate my tool library between hsmexpress and linuxcnc's database...anyone ever done it before?
[21:15:14] <cradek> I don't know what hsmexpress is, but be aware you can set the tool table entries with G10 commands in your gcode
[21:15:34] <benjamin23> anyone around
[21:17:33] <anarchos2> cradek, ah i was not away of that...hsmexpress is the free (limited to 2.5D) version of hsmworks, a CAM program for SolidWorks or Autodesk...i think Autodesk now owns it.
[21:18:26] <benjamin23> where can I find some info to reduce latency, or at least learn what causes it
[21:21:20] <Jymmm> benjamin23: disable things in BIOS that you don't need.
[21:22:13] <Jymmm> that's pretty much all you can do. It's all based on the North/South bridges and the design of the mobo itself.
[21:22:43] <benjamin23> ok. I will do that now. I am reading over the wiki latency-test and I'm having a hard time making a connection, unless people are putting on bogus info
[21:22:58] <cradek> what are your numbers?
[21:24:38] <benjamin23> 18k and 10k using onboard video stealing 1GB ram from the 4GB available
[21:25:03] <cradek> those are fine
[21:25:09] <cradek> don't worry about it
[21:25:12] <benjamin23> what confuses me is some older machine significantly out perform newer ones
[21:25:44] <cradek> sure, get yourself a smp P3 if you need great numbers. but you don't -- 18k is beautiful
[21:26:09] <anarchos2> gmoccapy makes me want to get a touch screen, i think
[21:26:15] <benjamin23> smp p3?
[21:26:21] <cradek> unless you need extremely high step rates, in which case get yourself a mesa card with a smart step generator
[21:27:01] <cradek> because latency is a nice number you can mess with for days trying to improve, it gets more attention than it deserves. if you're under 30k it's fine, move on with your build
[21:27:45] <anarchos2> benjamin23, i have 17k latency and have not noticed any problems at all
[21:30:22] <benjamin23> interesting. I don't plan on micro-stepping, I figure that if I need smaller or more precise movement, I'll gear it down which will give more torque anywayu
[21:31:43] <benjamin23> also, for the BIOS parallel port settings, there is PS/2, EPP, ECP... any particulars?
[21:36:08] <cradek> acpi power saving, speed scaling
[21:40:23] <benjamin23> both have been shut off
[21:40:47] <benjamin23> I did notice a latency decrease going from analogue to DVI video
[21:43:09] <benjamin23> I've also thought about the installation process. on some computers, including newer ones, the computer hardward, whatever it is, doesn't like EXT4 and, it *seems* to me, EXT3 is faster
[21:43:30] <benjamin23> I have stupid fingers tonight, damn. hardward=hardware
[21:54:08] <Jymmm> I have some nice SPST snap-in rocker switches, but could use some DPDT toggle switches, anyone wanna trade?
[22:23:16] * Tom_itx gives Jymmm a N/O reed switch instead
[22:24:49] <Jymmm> Nah, too much of a pita