#linuxcnc | Logs for 2014-06-06

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[01:59:51] <Deejay> moin
[02:01:49] <renesis> no u
[05:48:30] <jthornton> morning
[07:04:50] <lair82> Good morning, I get a fault on updating the grub, "/etc/default/grub: 11: acpi_irq_nobalance: not found: What are your thoughts?
[07:07:40] <lair82> The forum thread "http://www.linuxcnc.org/index.php/german/forum/18-computer/25927-reducing-latency-on-multicore-pcs-success?limitstart=0" isn't real clear on applying this.
[07:08:07] <lair82> Of course most of this is clear as mud for me most of the time anyway.
[07:08:43] <lair82> CaptHindsight
[07:15:16] <jthornton> you did the isolcpus=1 thing?
[07:15:24] <lair82> yep
[07:15:57] <Tom_itx> it's gonna be a great day!
[07:16:44] <jthornton> lair82, http://wiki.linuxcnc.org/cgi-bin/wiki.pl?The_Isolcpus_Boot_Parameter_And_GRUB2
[07:16:58] <jthornton> every day I wake up is a great day!
[07:17:31] <Tom_itx> we say that more the longer we live ehh?
[07:17:39] <skunkworks> jthornton, was it a bigger rpc that fixed your poblem?
[07:17:41] <jthornton> lol yea
[07:17:46] <skunkworks> problem
[07:18:04] <jthornton> skunkworks, yep it took 20hp to get the VMC to run like it should
[07:18:17] <skunkworks> awesome
[07:18:37] <Tom_itx> what's the VMC's spindle hp?
[07:18:43] <jthornton> and I might add the 20hp idler is specially wound to be a RPC so the phase balance is better
[07:18:56] <jthornton> 7.5 I think
[07:23:37] <Tom_itx> this router's been kickin my butt for a week now but finally making some progress last night
[07:24:13] <Tom_itx> i'll be an IT tech by the time i'm done :)
[07:25:03] <jdh> ewwww
[07:25:35] <Tom_itx> agree
[07:25:59] <jdh> it's a router. how complicated can it be?
[07:27:12] <Tom_itx> learning how to speak router as i go
[07:29:13] <skunkworks> do you have to roll your R's?
[07:50:55] <lair82> I must be missing a step or editing the wrong file. I already had done the 07 rtai application originaly to isolate the cpu's.
[07:52:56] <lair82> The thread says to modify the /etc/default/grub file and add "isolcpus=1 acpi_irq_nobalance noirqbalance". which I did using "sudo gedit /etc/default/grub"
[08:01:39] <Jymmm> lair82 What is the very first line in your grub file say?
[08:19:34] <lair82> GRUB_DEFAULT = 0
[08:47:23] <Jymmm> lair82: Which "thread" are you reading?
[08:48:23] <Jymmm> I'm wondering if that's related to GRUB or GRUB2
[08:52:35] <JT-Shop> doesn't 10.04 use grub2?
[08:58:56] <Jymmm> lair82: Did you run update grub after editing?
[08:59:18] <Jymmm> JT-Shop: Correct.... 10.04 uses grub2
[09:02:04] <Jymmm> This is so damn weird... I FINALLY cleared the pipes enough run the washing machine (would back up during drain previously), but the damn tub backs up (very slow to drain) and makes the toilet gurgle
[09:03:26] <Jymmm> with a 25ft hand snake, I hit the washer drain pipe twice, and the 2" bathroom basin roof vent and the 4" toilet/tub roof vent.
[09:04:12] <Jymmm> And that was after 3-4 days of enzymes and 1/2 bottle of sulfuric acid.
[09:15:17] <CaptHindsight> lair82: are you using 10.04 or 12.04? I picked up a ASRock FM2A88M-HD+ yesterday
[09:29:18] <CaptHindsight> lair82 is trying to modify his kernel options and also run the irq affinity script to lower his jitter down to ~2000 http://www.linuxcnc.org/index.php/german/forum/18-computer/25927-reducing-latency-on-multicore-pcs-success?limitstart=0
[09:30:04] <CaptHindsight> the script is here http://www.linuxcnc.org/media/kunena/attachments/16436/irqstuff.zip
[09:30:48] <CaptHindsight> I'll update the latency page on the wiki with more howto lower jitter later
[09:31:24] <CaptHindsight> Kernel options "isolcpus=1 acpi_irq_nobalance noirqbalance",
[09:54:51] <lair82> I am using 10.04
[09:55:47] <lair82> I did run update-grub, after I edited the file.
[10:00:47] <maZer`-> hi all
[10:02:36] <maZer`-> how do i setup on linux cnc the tool release and tool fix
[10:02:45] <maZer`-> also i have 2 contacts, one for tool release and one for tool fix
[10:03:46] <maZer`-> how can i control this over linuxcnc ? :(
[10:43:44] <maZer`-> does someone know good start values to tune servo pid ? :(
[10:45:33] <Connor> maZer`-: http://gnipsel.com/linuxcnc/tuning/servo.html
[10:47:45] <pcw_home> Also unless you normalize the PID scaling, guesses for starting values depend on MM or inch mode
[10:48:03] <maZer`-> mm mode :D
[10:49:02] <pcw_home> so gains will be about 1/25th of gains in a inch system
[10:49:10] <maZer`-> ok
[10:49:53] <maZer`-> but im not sure how to start
[10:50:06] <pcw_home> (unless you normalize the PID by setting the output scale to machine unist per second at full scale PID output)
[10:50:10] <maZer`-> at the moment i got p=1 and all other values are zerod
[10:50:35] <pcw_home> JTs tutorial is helpful (for velocity mode drives)
[10:50:53] <Connor> pcw_home: just doesn't give starting values..
[10:50:54] <maZer`-> im a really big noob im not sure i used the pncconf wizard
[10:51:46] <maZer`-> and my english is not the best. also im trying to understand but i think i missunderstand many things
[10:51:47] <pcw_home> well starting values depend on scaling
[10:52:04] <maZer`-> scaling from rotations to mm?
[10:52:58] <pcw_home> First question is what mode your drives are running in (velocity, torque, voltage (hBridge is voltage))
[10:53:28] <pcw_home> tuning is different depending on drive type
[10:53:59] <maZer`-> ok
[10:54:21] <maZer`-> its a old machine i just installed new computer ;D
[10:55:09] <pcw_home> what type of drives and motors? are they DC m otors with tachometers?
[10:55:27] <maZer`-> yes dc motors with tachometers
[10:55:36] <maZer`-> and linear encoders for position
[10:56:16] <pcw_home> OK those are velocity mode servos so JTs tutorial is appropriate
[10:57:44] <maZer`-> ok
[10:59:22] <maZer`-> ok also does i understand the tutorial right, first i need to tune p then ff1 and ff2
[10:59:27] <pcw_home> do you know how to use the calibrate menu in axis?
[10:59:41] <maZer`-> yes i can enter values and do test and ok
[10:59:44] <maZer`-> and then machine is using it
[10:59:46] <maZer`-> correct?
[11:01:33] <pcw_home> OK so the first thing is to increase P until you get oscillations (you will neet to increas the min_ferror and ferror settings for tuning)
[11:02:30] <maZer`-> i got very high values
[11:02:42] <maZer`-> i think i did
[11:02:43] <maZer`-> 10.0
[11:02:57] <pcw_home> Thats fine
[11:03:02] <maZer`-> ok
[11:03:20] <maZer`-> ok also
[11:04:03] <pcw_home> once you find out the threshold for oscillations with increasing P you set P to about 1/2 the value whwre oscillations start (this is pretty conservative)
[11:04:12] <pcw_home> where
[11:04:36] <maZer`-> i think i did wrong with hal oszi
[11:06:31] <pcw_home> yeah you want to setup HALscope to monitor at least ferror and commanded velocity
[11:06:59] <maZer`-> ok
[11:07:09] <maZer`-> joint-vel-cmd 5m/div ?
[11:07:09] <maZer`-> :D
[11:07:42] <maZer`-> my signal oscilates but has
[11:08:00] <maZer`-> but is always above or under the middle line with 2,5 div
[11:09:55] <pcw_home> how big a position oscillation ? (dont let it oscillate continuously)
[11:10:37] <maZer`-> f-error ?
[11:10:46] <maZer`-> on p=3 i got 1,5 divisions
[11:11:19] <pcw_home> 1.5 divisions means what distance?
[11:11:23] <maZer`-> on 4 i got only 1 divisions
[11:11:51] <maZer`-> also scale 1/div im really an idiot
[11:12:04] <maZer`-> just see the middle line, and it oscilates 1 division over or under the middle line
[11:12:53] <maZer`-> also if i drive + over if i drive - under ;D
[11:13:02] <pcw_home> so you are saying it continuously oscillates back and forth with 2 mm swing?
[11:13:44] <maZer`-> is f-error in mm? :D
[11:14:13] <pcw_home> its in machine units
[11:14:21] <maZer`-> also mm :)
[11:14:34] <pcw_home> so if you machine is setup for mm, ferror is in mm
[11:14:45] <maZer`-> ok also i got now with p=5
[11:14:58] <maZer`-> 1mm error but is oscillated
[11:15:19] <maZer`-> should i search the best line without oscilation?
[11:16:46] <pcw_home> you need to find the P value when it starts oscillating
[11:17:30] <maZer`-> ahhhh ok :D
[11:17:33] <pcw_home> (which means if it oscillates a P= 1 P is still too high)
[11:17:33] <maZer`-> start by p=1
[11:17:44] <pcw_home> or .1
[11:20:02] <pcw_home> also make very sure you have very little backlash
[11:20:04] <pcw_home> (as this will cause oscillations you can not tune out except by increasing the dead zone)
[11:21:44] <maZer`-> ok
[11:47:37] <IchGuckLive> hi all B)
[12:10:04] <IchGuckLive> hot summer eve here in germany up to 30deg C today
[12:48:04] <Loetmichel> IchGuckLive: my outdoor thermometer says 37.8°c
[12:48:06] <Loetmichel> NOW
[12:49:01] <IchGuckLive> ;-)
[12:49:55] <Tecan> and bingo was a nameo
[13:02:27] <IchGuckLive> Loetmichel: and it will get mutch more
[13:02:37] <IchGuckLive> hi lucb
[13:24:12] <IchGuckLive> Loetmichel: out for BBQ as tems come down now and its nice to set up the telescop tonight
[13:24:21] <IchGuckLive> BYE
[13:48:33] <maZer`-> does linuxcnc have function for releasing tool? :D
[13:48:39] <CaptHindsight> setting irq affinity to cpu0 has the greatest effect on reducing latency
[13:49:18] <CaptHindsight> it gives a 2-4x improvement in jitter reduction
[13:49:32] <maZer`-> i connected a button to my controller for releasing the tool, but how to configure it in the config
[13:51:06] <CaptHindsight> 24 hours on the E350M1 and it's 2176nS max on the 25uS thread
[13:53:10] <archivist> maZer`-, you can define an io to connect to your tool changer there are docs of how people have implemented tool changers
[13:54:22] <maZer`-> archivist can you help me to find the doc?
[13:54:58] <archivist> some use classicladder
[13:55:42] <archivist> http://wiki.linuxcnc.org/cgi-bin/wiki.pl?ToolChange
[13:55:48] <maZer`-> oh ok
[13:57:08] <maZer`-> hm i think for the first is ok if i just connect the io
[13:57:28] <maZer`-> also if io xxx = 1 do io32 = 1 ;D
[13:57:34] <maZer`-> just connect ios :D
[14:00:31] <archivist> what and how you connect is specific to your machine and most of use cannot know what you have left in the control to use
[14:03:45] <Jymmm> The John Homes / Ron Jeremy of cnc porn... https://www.youtube.com/watch?v=9MFRPGf4JDk
[14:12:31] <FrankZappa> HNNNNNNNNNNNGGGGGGGGGGGGG
[14:13:31] <FrankZappa> videos like these explain how Hitler almost conquered the world
[14:14:34] <syyl> we hadnt a ctx delta back then ;)
[14:15:59] <Jymmm> The john holmes isn't very cnc porn, but this is... https://www.youtube.com/watch?v=A_qHR_H_2cg
[14:16:05] <Jymmm> ^good
[14:16:33] <syyl> i prefer the soundtrack of the other video ;)
[14:16:40] <syyl> the second one is so..
[14:16:53] <syyl> sounds like the weather forecast
[14:26:58] <archivist> maZer`-, keep in channel so others can answer
[14:28:19] <maZer`-> im trying to load the classicladder gui
[14:28:39] <maZer`-> do i need only to insert the line loadusr classicladder in the custom.hal?
[14:53:41] <Connor> Okay guys.. I have a off the wall question.. This involves my car's power steering.. which is electric.. It was acting up for a while.. I.E. shuddering when I turned the wheel when sitting still or very low speed. and more than once occasion fought back at me.. trying to go the opposite way or just plain locked up.. I took it to the mechanic to fix.. and have oil changed.. they did oil change.. and talking with them I decided I could change out the s
[14:54:06] <Connor> Went and picked up the car and the parts.. but now it's not doing any of the symptoms.. back to norma
[14:54:43] <Connor> Looking at the new motor.. I notice it's a 3 wire DC motor. and I checked with the mechanic and the only thing they did was look at the wires.. (as did I).
[14:55:01] <Connor> I'm wondering if a loose wire.. or weak connection could have caused the issue
[14:56:06] <Connor> I know this isn't a CNC deal.. but it is motion control related. :)
[14:56:19] <CaptHindsight> hallelujah! sure, there are probably encoders there as well on a separate connector
[14:56:39] <Connor> They're is.
[14:56:42] <CaptHindsight> like any closed loop system
[14:56:54] <skunkworks> wait - it isn't a stepper? ;)
[14:57:22] <Connor> I think it's a brushless 3 phase DC
[14:57:23] <CaptHindsight> so if you generate some crazy feedback it's going to try and compensate until it's way out of range
[14:57:39] <maZer`-> can someone tell me how to open the classicladder gui? I added loadusr classicladder to custom.hal but no success
[14:58:00] * Jymmm smacks Connor for attempting to poorly justify electric power steering as "motion control"! If that was the case so is viagra!
[14:58:26] <Connor> I'm just wondering if I should hang onto the replacement motor that cost me over $350.00 or return it..
[14:58:28] <maZer`-> but if i run my machine there is no gui starting :(
[14:58:32] <Connor> it's been fine for a few days now.
[14:58:54] <Connor> Jymmm: It IS motion control.. Full Closed Loop servo
[14:59:11] <Jymmm> Connor: Hold on to it till you can't return it, but REMEMBER it too
[14:59:11] <CaptHindsight> woot! getting 2x better latency jitter on every board we try Gigabyte GA-MA785GSM-US2H went down from ~13k to 7k
[14:59:23] <Jymmm> Connor: So is viagra
[15:01:19] <Connor> Well.. since it worked at high speed.. i'm thinking maybe a weak connection in one of the phases... and messing with the wires "fixed" it.
[15:04:17] <PCW> Those are 3 phase AC servos so maybe bad motor drive phase wiring or bad feed back wiring
[15:05:31] <PCW> (sort of sounds like a commutation error)
[15:06:15] <Connor> AC servo in a Car?
[15:07:12] <PCW> yep
[15:22:53] <maZer`-> someone can help me to get classicladder running?
[15:23:02] <maZer`-> there is no gui starting :(
[15:51:49] * JT-Shop just got a $66 education on hydraulic hose sizing
[15:52:47] <Tom_itx> just crank up the pressure
[15:53:45] <JT-Shop> I did that a few years ago and got the hydraulic pump rebuilt
[15:54:06] * JT-Shop thinks it's time to play in the dirt now
[16:12:01] <maZer`-> if i try to start classicladder i get following error
[16:12:01] <maZer`-> shared memory conflict or rt component not loaded
[16:13:49] <ben5446> do you have this in your hal file: "loadrt classicladder_rt....."
[16:14:33] <maZer`-> in custom.hal
[16:14:38] <maZer`-> i got loadusr classicladder
[16:14:47] <maZer`-> should i load classicladder_rt too?
[16:15:09] <ben5446> yes. it should look like:
[16:15:11] <ben5446> loadrt classicladder_rt numRungs=70 numBits=60 numWords=10 numTimersIec=20 numMonostables=2 numPhysInputs=25 numPhysOutputs=25 numArithmExpr=50 numCounters=1 numSections=1 numFloatIn=10 numFloatOut=10
[16:15:26] <ben5446> your variable numbers may vary
[16:15:28] <maZer`-> direct in my hal or custom.hal? :d
[16:15:59] <ben5446> in your hal
[16:16:04] <maZer`-> oh very nice
[16:16:06] <maZer`-> moment
[16:16:35] <Deejay> gn8
[16:20:52] <ben5446> does anyone know if there is a g-code command to move a joint. I have a 5-axis machine and want to raise/lower the Z-axis without the kinematics causing all the other joints to move.
[17:19:09] <cradek> ben5446: nope, there is no way to do that. perhaps you want to add W axis support to your kinematics to do that.
[17:19:53] <cradek> gcode operates in world space, controlling the (up to) nine axes
[17:20:50] <maZer`-> xD
[17:20:55] <maZer`-> wlan working yahoo xD
[17:23:33] <zeeshan> hmm, need to make another hole in my belt
[17:23:52] <zeeshan> drill press or mill or dremel or punch or lathe
[17:23:53] <zeeshan> hmm!
[17:25:00] <Tom_itx> laser
[17:25:09] <zeeshan> :D
[17:25:17] <maZer`-> no not working :(
[17:54:05] <CaptHindsight> Unity desktop really stinks when using a touchscreen
[17:56:44] <cradek> is there another time it doesn't suck?
[17:56:50] <cradek> er, stink
[17:56:58] <cradek> I guess I added my own word there
[19:27:27] <CaptHindsight> anyone know what version of debian works with sebs debs?
[19:30:22] <XXCoder1> fuck fridays
[19:30:45] <XXCoder1> I hate fridays. bad traffic. hour and half long drive when normally 32 min
[19:32:35] <jdh> I left at noon to avoid that.
[19:33:58] <XXCoder1> Cant do early bah lol
[19:57:07] <andypugh> if halcmd doesn’t work, but sudo halcmd does, because the first version can’t open shared memory, does anyone know the fix?
[19:57:29] <andypugh> (the same is probably true of LinuxCNC too)
[19:59:55] <cradek> I think that's a rtai configuration problem
[20:00:00] <cradek> there should be udev rules
[20:00:05] <cradek> let me see if I can find it
[20:00:44] <cradek> andypugh: congrats on your magneto and first run
[20:00:50] <maZer`-> ok
[20:01:08] <andypugh> cradek: The permissions problem is maZer there
[20:01:38] <maZer`-> :(
[20:02:18] <andypugh> I bolted the engine in last night, I am very close to having a vehicle. Not one with any brakes, but brakes are over-rated. Or a seat. I actually quite like seats.
[20:02:23] <cradek> /etc/udev/rules.d/99-rtai.rules
[20:02:51] <maZer`-> ohh this file is not exist :(
[20:03:07] <cradek> what kernel and rtai install is this?
[20:03:11] <maZer`-> 3.4.55
[20:03:13] <maZer`-> rtai2
[20:03:34] <andypugh> (Precise / Buildbot)
[20:03:42] <cradek> $ dpkg -S 99-rtai.rules
[20:03:42] <cradek> rtai-modules-3.4.55-rtai-2: /etc/udev/rules.d/99-rtai.rules
[20:03:57] <cradek> I don't know why you don't have that. it's in the package.
[20:04:28] <maZer`-> can i extract it?
[20:05:09] <cradek> you should figure out what's wrong instead
[20:05:29] <cradek> don't hack around the package manager
[20:05:41] <cradek> do you have that package installed? if so what version?
[20:07:39] <maZer`-> also i upgraded from 10.0 to 12
[20:07:47] <maZer`-> and was not able to install the modules-rtai
[20:07:55] <maZer`-> because old version was installed. also removed with apt
[20:07:59] <maZer`-> and installed new package
[22:06:47] <Connor> wOOt. Just used my Router for the first time in over a year 1/2
[22:08:31] <Connor> Having some issues with the X home / limits .. I either have a bad connection / wire, or it's getting EMF.. It'll trip for no reason for just a split second.
[22:09:33] <pcw_home> NO or NC switch?
[22:12:02] <Connor> Photo interrupt with a schmitt trigger
[22:12:28] <andypugh> http://www.linuxcnc.org/docs/html/man/man9/debounce.9.html
[22:12:43] <Connor> yea.. I have that...
[22:13:07] <andypugh> In that case you may need a proper solution
[22:13:18] <Connor> what is the delay value in ?
[22:13:24] <Connor> ns? ms?
[22:13:24] <andypugh> threads
[22:13:56] <Connor> I've got it set to something like 500
[22:14:10] <andypugh> That’s quite long
[22:14:22] <Connor> yea.. I was trying to debug.
[22:14:23] <andypugh> I have it at 3!
[22:15:24] <Connor> it's something beyond the schmitt, I have LED's wired in too.. and they're not showing that's it's tripped.
[22:15:50] <Connor> gotta be a loose wire or connection from the PCB to the BOB
[22:16:15] <Connor> I'll track it down next time.. :)
[23:27:03] <XXCoder1> hey Connor that long?
[23:27:17] <Connor> Yea. Been working on my Mill. and life..
[23:27:24] <XXCoder1> cool :)
[23:27:30] <XXCoder1> I lucked out yeserday :D
[23:27:55] <Connor> jhow so ?
[23:28:06] <XXCoder1> got pile of wood sheets and this THICK slab of wood from fancy table. there was HUGE sheets of plywood as part of pallets too but too big for my car bahh
[23:28:24] <XXCoder1> its inch thick and plenty large for my cnc y axis :)
[23:29:15] <XXCoder1> so I now has good wood for all 3 axes.
[23:29:20] <XXCoder1> axis
[23:30:37] <Connor> Cool
[23:30:54] <XXCoder1> yeah
[23:31:05] <XXCoder1> it'll be bit weird though
[23:31:15] <XXCoder1> its from very expensive meeting type table
[23:31:22] <XXCoder1> so it has this fancy wood pattern lol
[23:31:33] <Connor> what was wrong with it ?
[23:31:49] <XXCoder1> dunno the part was in wood scrap bin
[23:31:55] <Connor> Wow.
[23:32:04] <Connor> Would think they would cut it down and use it for something else.
[23:32:07] <XXCoder1> yeah. inch thick jeez
[23:32:24] <XXCoder1> its sawdust type so not really useful that way
[23:32:43] <Connor> I routed out 30 .77" holes in 1.5" thick plywood (2 x .75" I laminated myself)
[23:32:46] <XXCoder1> but still very thick and rigid enough for my cnc, just gonna be careful bolting on
[23:35:14] <Connor> They didn't come out perfectly round.. Guess the plywood is a bit harder than MDF is.. and my machine isn't super rigid..
[23:35:33] <Connor> but, good enough for what I need it for.
[23:35:40] <toastydeath> spring pass?
[23:35:58] <Connor> I did. Probably moving too fast too..
[23:36:23] <toastydeath> ballscrews or leadscrews
[23:36:30] <Connor> I did Spiral Inside profiles .125" per down to 1.4" depth..
[23:36:40] <toastydeath> ballscrews or leadscrews?
[23:36:54] <toastydeath> or rather what's the backlash on the machine
[23:36:55] <Connor> then went back and did a pocket pass .7" depth per pass.
[23:36:59] <Connor> ballscrews.
[23:37:10] <toastydeath> so probably like .0007 or so on backlast?
[23:37:13] <toastydeath> *backlash
[23:37:22] <XXCoder1> even odder thing? the meeting table was placed in pallet with 8 chairs (it can easily seat 12, its that large) and wrapped in plastic. still wonder why that single peice (same color and all) was thrown away
[23:37:23] <Connor> probably higher. C7's
[23:37:33] <toastydeath> what size endmill did you use
[23:37:39] <Connor> 1/4"
[23:37:43] <toastydeath> weird
[23:37:58] <Connor> could be the router wasn't 100% trammed.
[23:38:07] <Connor> and the gantry moving side to side a bit..
[23:38:27] <Connor> doc on the bit probably wasn't good enough for 1.4" either..
[23:38:38] <XXCoder1> con, could always upgrade gantry
[23:38:39] <Connor> I think the shank was in contact with the wood.
[23:38:58] <XXCoder1> 2 sheets per side and very rigidly built
[23:39:01] <Connor> It's going to be redone in all alum at somepoint.
[23:39:06] <XXCoder1> nice
[23:39:11] <Connor> no room to do double thick..
[23:39:45] <XXCoder1> was thinking 2 per side, with some seperation but very strongly connected. reforced. makes for super rigid gantry
[23:41:47] <Connor> I had issue with my Z too.. the coupler was loose on the ball screw.. ended up going deeper and deeper on my test part.. ended up going into the spoil board.. ticked me off..
[23:42:19] <XXCoder1> ow so was underpowered and dropping or missing steps on up only?
[23:42:38] <Connor> wasn't missing steps.. just slipping when going up..
[23:42:53] <Connor> I had to tighten up the coupler.
[23:43:07] <XXCoder1> heh I'd do a air run test first
[23:43:21] <XXCoder1> better to see screwups than have evidence of such ;)
[23:44:00] <Connor> it was so subtle, you probably would have noticed..
[23:44:24] <XXCoder1> i probably would. ;)
[23:44:32] <XXCoder1> http://toolmonger.com/wp-content/uploads/2010/01/cnc72-450.jpg
[23:44:39] <XXCoder1> check how gantry sides is designed
[23:45:27] <Connor> That's pretty toughs.. looks like lead screw and not ballscrews..
[23:47:30] <XXCoder1> guess so. I have ballscrews.
[23:47:51] <XXCoder1> because why not? chinese shit ones ballscrews is still better than acme or lead screws