#linuxcnc | Logs for 2016-09-16

[00:02:58] <CaptHindsight> FDM or all types?
[00:04:00] <norias> all types
[00:04:19] <norias> they have a whole little section this year
[00:06:46] <norias> i talked to extrude hone about standardizing a process for polishing really simple injection molds
[00:07:25] <norias> uh... someone is selling a boring tool
[00:07:40] <norias> that you adjust with an electronic tool, and is under constant tension
[00:07:59] <norias> so that, supposedly, it can do 50 millionths increments on the bore
[00:08:01] <norias> pretty easy
[00:48:26] <Cromaglious_> hmm pwm not working... futz with it next week when I'm back...
[02:41:52] <Deejay> moin
[07:31:43] <_methods> next time its in vegas i'll go
[07:35:31] <XXCoder> okay thats random lol
[07:40:41] <malcom2073_> I believe he's talking about IMTS
[07:41:09] <archivist> or some other dream
[07:43:43] <XXCoder> heh
[07:43:58] <XXCoder> talking about dream, time for me to get some dreams laters
[08:00:16] <_methods> it was indeed about imts
[08:00:33] <_methods> didn't look at timestamp on that conversation until after i hit enter lol
[08:00:40] <_methods> bout 8 hours too late for that one
[08:06:15] <gregcnc> yeah I wanted to go but it'll have to wait
[08:28:44] <CaptHindsight> _methods: you can come here for Shooting Week, it's held every week
[08:33:36] <archivist> line this one against the wall before you start shooting https://www.youtube.com/watch?v=4lhXpp1VJ1w
[09:20:25] <_methods> heheh isn't it shooting hour around there
[10:24:32] <miss0r> This DeWalt 26204K router is actualy very nice. it might actualy pull off as a high speed spindle in a metal milling application
[10:25:59] <miss0r> I didn't know what to expect. But I replaced the power cable in it, so I could fit it through my cable chain. and just the electrical part on the top of it is very impressively done. It just screams quality
[10:26:06] <miss0r> Just felt like sharing that with you ;)
[10:32:42] <lair82> Hello Guys, does anyone have any tips on trying to solder a Lithium ion battery to a PCB? In one of our other controls, the machine was off for quite a while, and the battery went dead, it is a LS14500, 3.6v Li Ion battery, and it appeared to be pinch welded to some tabs on the PCB it is attached to.
[10:34:11] <sync> Just be quick when soldering
[10:35:22] <lair82> Its like the battery isn't taking enough heat for the solder to wet onto it. Keep going?
[10:37:30] <archivist> stainless, so no
[10:37:32] <sync> High powered iron and lots of flux
[10:37:51] <archivist> acid flux maybe
[10:38:12] <sync> Check the datasheet what the contact material is
[10:38:43] <CaptHindsight> http://www.onesourcebattery.com/energy-ls14500-k-battery-3-6v-robot-control-plc-industrial-computer/
[10:39:11] <archivist> buy a battery with tabs is the best idea
[10:40:27] <CaptHindsight> $5 http://www.atbatt.com/saft-ls14500-ax-aa-36-volt-li-socl2-lithium-battery-cell-with-axial-pc-leads.asp
[10:41:06] <lair82> We found the actual battery here local, for less than 10 bucks, and I tried for a few minutes, the tab was taking solder, not the battery though
[10:41:39] <archivist> because stainless probably, hence it was welded
[10:41:52] <lair82> And of course, the OEM wants $112 for the replacement
[10:43:11] <archivist> any wire/tab fitted battery will do
[10:46:19] <archivist> anyway, all the news these days is about exploding lithium batteries, dont solder them
[10:50:30] <_methods> like sync said you need a good soldering iron
[10:50:43] <_methods> pre tin the battery
[10:50:53] <_methods> then solder the tab to it
[10:51:49] <_methods> obviously the correct answer is to spot weld it but not everyone has access to a tab spot welder
[10:51:54] <sync> some use nickel plated ends
[10:51:57] <_methods> plenty of people solder them just be quick
[10:54:40] <CaptHindsight> don't try to braze them
[10:56:11] <CaptHindsight> https://www.youtube.com/watch?v=iLQPeunfoa4 homemade battery tab spot welder
[11:07:31] <SpeedEvil> Neodymium magnets can be briefly soldered to on an edge
[11:07:44] <SpeedEvil> The magnet then sticks to the battery
[11:16:11] <CaptHindsight> I hear that he's working on a 3D printer next https://www.youtube.com/watch?v=MxRJjzSY_JE
[12:03:29] <MacGalempsy> man, its going now
[13:21:02] <Kevin`> lair82: use lots of flux and don't apply heat to the battery for too long or you will boil/damage the internals. it's intended to be spot welded and not really designed with soldering heat in mind
[13:30:19] <CaptHindsight> has anyone seen a water soluble potting compound that you can use as a fixture for small or fragile parts for machining?
[13:31:02] <archivist> CaptHindsight, watch/clockmakers used shellac
[13:32:08] <archivist> http://www.boley.de/en/shop/4858.shellac-chuck-set-a21/683119.shellac-chucks
[13:33:34] <CaptHindsight> shellac or wax
[14:19:15] <miss0r> Have any of you ever messed around with grbl? I am experiencing some strange stuff here
[14:19:53] <CaptHindsight> thats why I don't mess around with grbl
[14:20:33] <miss0r> yeah, I just need this project done. Then I'll hook it up to LinuxCNC. That never let me down
[14:20:58] <enleth> I tried, but the result was all grbld up
[14:21:27] <CaptHindsight> it's a work in progress
[14:21:34] <miss0r> Mostly it does 'fine'. But I am experiencing some movements that is definetly not part of the g-code. very odd
[14:22:16] <_methods> i think that's a grbl feature
[14:22:32] <_methods> random movements for your viewing pleasure
[14:23:06] <miss0r> I think I am the wrong audience - I do not get amusement from random movements.
[14:23:42] <_methods> richard gere does
[14:24:10] <_methods> i hear hes a huuuge fan of them gerbls
[14:25:44] <malcom2073_> Heh, grbl is great at ignoring the laws of physics
[14:26:26] <miss0r> malcom2073_ This one does actualy have ajustable acceleration
[14:26:34] <malcom2073_> miss0r: It does seem to doesn't it? :)
[14:27:16] <malcom2073_> If you're having issues with direction changes, Ican tell you why. If not, then I dunno because after I discovered that, I gave up with it
[14:27:23] <miss0r> I guess. I haven't ajusted it thou. But it does have some acceleration ajustment... you can just loosen the screws that tightenes the rubber bands this uses for propultion
[14:27:48] <malcom2073_> Grbl relies on rubber band construction
[14:27:51] <malcom2073_> Doesn't work well without it
[14:27:59] <miss0r> :]
[14:28:28] <miss0r> What did you do to correct the direction change? and when you say direction change, are we talking about x+ to x- or just any old direction change?
[14:29:53] <miss0r> I guess this problem only happens when it is about to change from running x to running y
[14:30:15] <miss0r> luckily I caught this error while it was still cutting air
[14:31:09] <_methods> well as long as you only cut one direction it should work just fine
[14:31:37] <malcom2073_> Any old direction change
[14:31:42] <malcom2073_> I corrected it by moving away from grbl
[14:31:47] <CaptHindsight> _methods: so it should fine for my bread slicer, as long as I don't get fancy
[14:31:56] <_methods> yes
[14:32:04] <_methods> or a slapchop
[14:32:15] <malcom2073_> Basically: On direction change, grbl assumes immediate velocity changes (infinite acceleration)
[14:32:24] <malcom2073_> If your machine is springy enough, it'll be fine
[14:32:29] <malcom2073_> Oh man the slapchop
[14:32:51] <_methods> cnc slapchop
[14:33:03] <malcom2073_> You wanna slap your nuts, chop your nuts
[14:33:13] <_methods> kids love my nutz
[14:33:17] <miss0r> This machine is springy... :) its like it should move x+, but it does x-, and then quickly changes it mind, returning to where the error started and moves on. This is just no good for my workpeice
[14:34:07] <enleth> miss0r: does it happen even if you set a very slow feedrate?
[14:34:28] <miss0r> enleth: good question. I will try that. hang on
[14:35:47] <CaptHindsight> sounds like your machines are designed wrong, nobody would write software that acts like that
[14:36:09] <_methods> it's a feature
[14:36:13] <_methods> you keep forgetting that
[14:36:28] <enleth> miss0r: also, do you have an oscilloscope or a logic analyzer (even a small chinese saleae knockoff would do)?
[14:36:36] <CaptHindsight> it should work for my galvos
[14:36:42] <enleth> miss0r: I'd try to monitor the DIR line to the stepper driver
[14:36:57] <miss0r> enleth: it repeated the error at 500mm/m, before I ran it at 2500.
[14:37:04] <enleth> miss0r: additionally, see if it happens in both directions
[14:37:24] <enleth> as in, on both "left" and "right" turns
[14:37:28] <enleth> and on both x and y
[14:37:36] <miss0r> enleth, the grbl is not something easily tapped into :) no seperate stepper drivers
[14:37:56] <enleth> they're still separate chips, kynar is your friend
[14:38:10] <miss0r> it almost looks like it is trying to make small taps
[14:38:46] <enleth> anyway run two squares, one clockwise, one counterclockwise
[14:38:53] <miss0r> This is just ridiculous. i'm just thinking here. as it makes the mistake in the same place, and i've looked at the g-code(it looks good) I would conclude the grbl controller is an idiot
[14:38:54] <enleth> and note which corners are affected
[14:39:43] <enleth> monitoring the step/dir lines would really help to see if it's actually commanding the stepper drivers to do this
[14:39:49] <miss0r> enleth: its like, when I run a simple rectangle, it performs the way it should. but when i run this ramping down outer contour, it dies on me
[14:39:59] <enleth> ah, ok
[14:40:22] <miss0r> it just hit me... it is possible, it can't handle 3-axis movement all at once? :S
[14:40:30] <CaptHindsight> _methods: https://github.com/grbl/grbl, "Grbl includes full acceleration management with look ahead. That means the controller will look up to 18 motions into the future and plan its velocities ahead to deliver smooth acceleration and jerk-free cornering."
[14:42:59] <miss0r> This is just ridiculous. Perhaps it is looking 18 moves ahead and gets stressed out, because it can't see EOF yet
[14:44:00] <CaptHindsight> if you ask me the whole thing is ridiculous, why reinvent the wheel yet again?
[14:44:26] <miss0r> I get why someone would want it. it is compact, easy and ocationally functional
[14:47:16] <CaptHindsight> AlmostWorks™
[14:47:20] <miss0r> I think it might add up to where it tries to run all three axis at once...
[14:47:48] <malcom2073_> That is why I like the tinyg2 project. It doex proper motion control, but in a nice small form factor. Shame it doesnt get much development anymore
[14:48:53] <malcom2073_> Though.... The idea of a PI and ethernet mesa has me excited
[14:49:54] <CaptHindsight> hm2_rpspi is working
[14:50:16] <miss0r> bleh, i'll head to bed. this will have to wait till later. see you around
[14:50:27] <CaptHindsight> so it works with the SPI FPGA board, forget the number
[14:50:59] <malcom2073_> Not nearly as interesting to me though as a plug and play solution
[16:14:30] <Crom> On my phone heading to Morro Bay, ca
[16:16:13] <FloppyDisk525> Nice, should be a nice weekend, supposed to warm up.
[16:17:32] <Crom> Meeting the sons girlfriend for first time
[16:17:39] <kyle___> good luck Crom
[16:17:57] <kyle___> it seems like that's vastly preferable to meeting your daughter's boyfriend for the first time :P
[16:18:29] <Crom> She keeps him in line, I like her already
[16:20:20] <Crom> Woo paint has a new video out
[16:28:41] <Deejay> gn8
[16:28:59] <Crom> Lnite deejay
[16:38:18] <Crom> On pacific coast highway north of ventura almost to carpeterial
[16:42:01] <Crom> Is there a pathpilotish front end besides axis?
[17:44:49] <MacGalempsy> hey hey
[17:56:12] <MacGalempsy> well, the EDM is on the workbench and all wired and hosed together. Now just time to run the electrical cable and install the receptacle.
[17:56:14] <MacGalempsy> https://www.flickr.com/photos/58181938@N03/albums/72157672808734442
[17:56:31] <MacGalempsy> Its raining cats and dogs here.
[18:31:46] <MacGalempsy> anyone drinking beer yet?
[18:49:24] <_methods> https://www.youtube.com/watch?v=q-t4EYomPVk
[18:49:33] <_methods> how'm i posed to get home
[18:49:37] <enleth> MacGalempsy: how did you get it up there? pallet jenga?
[18:51:21] <MacGalempsy> look in the pics
[18:51:55] <MacGalempsy> concrete blocks, a few 4x4 to stiffen the pallet
[18:52:11] <MacGalempsy> hi lift jack, rollers
[18:52:48] <MacGalempsy> 3 ton floor jack
[18:54:59] <MacGalempsy> now trying to get the floor cleared enough to roll the car back in the garage and call it a day!
[18:55:08] <MacGalempsy> funny thing is that EDM is 120v
[19:42:36] <Crom_> in Morro Bay yea!! the quite, the bees in the back wall, the noisy fan in this computer
[19:50:46] <Crom_> nothing CNC even close here... dryer has a switch hard wired in... up and on... timer broke 30 years ago... still haven't fix it. Washer is a bit better.. timer works cold valve works but not the hot
[19:51:04] <Crom_> ahhh vacation homes are so much fun
[19:52:36] <Crom_> have to tether for internet... irc's ok... hard to use up 500MB's videos... one video and your over the limit
[20:37:01] <gennro> indeed
[20:37:08] <gennro> can't watch much porno on that