#linuxcnc | Logs for 2013-09-21

[00:35:09] <Chemeleon> odd question - anyone ever seen a circuit setup to generate/drive the stepper pulses via an audio port on a pc?
[00:35:19] <Chemeleon> given the frequencies involved, seems like it could spit them out fast enough
[00:45:51] <NickParker> the peachy printer uses audio output control
[00:46:03] <NickParker> but that's different, because it's practically mirrors on speakers
[00:46:10] <Chemeleon> cool, will look into it
[00:46:31] <Chemeleon> I'm not looking for a high speed/complex setup - just thinking of an easy way to drive a single stepper where timing isnt critical
[00:46:48] <NickParker> what sort of power?
[00:46:53] <NickParker> <2 A?
[00:46:54] <Chemeleon> http://www.rockler.com/product.cfm?page=32801&site=ROCKLER saw this earlier
[00:47:07] <Chemeleon> thinking it should be easy enough to build, but dont want to have it tethered to a computer
[00:47:30] <Chemeleon> I've got a couple spare smartphones though, so if I can drive things via audio port and a small boost circuit, that would be an easy self contained touch screen controller
[00:48:10] <Chemeleon> just input distance, phone generates an audio file for that movement on the fly, spits it out the port, and voila :)
[00:49:20] <NickParker> yeah you could probably do that with a nema17 and a polulu A4988 breakout
[00:49:48] <NickParker> that takes step/dir/clock input, which is drop dead simple
[00:50:06] <NickParker> and you can use a $4 arduino to generate those inputs
[00:50:46] <Chemeleon> I've got a spare nema23 stepper (shaft sheered off so the company replaced it, but one end is still there) that I'd probably try to make work first
[00:50:51] <Chemeleon> overkill, but not cost that way
[00:51:04] <Chemeleon> would just need a short length of screw and some delrin to make the coupling and nut
[00:51:10] <NickParker> you could still use a polulu and just lower the vref
[00:51:16] <Chemeleon> bet all told, I could coble something together for under $30
[00:51:29] <NickParker> wouldn't get full torque out but who cares its overkill anyway
[00:51:40] <Chemeleon> yep, speed and strength dont really matter
[00:51:52] <Chemeleon> just as long as its not losing steps its fine :)
[00:52:07] <Chemeleon> would love to have one on my resaw bandsaw too
[00:52:17] <Chemeleon> hit a button, fence immeditely moves the exact distance you want :)
[00:52:34] <Chemeleon> been planning to build a manually screw driven fence like the driftmaster laguna makes one of these days anyway
[00:52:37] <NickParker> that would be a bit tricky to achieve with a crapduino
[00:52:41] <Chemeleon> if I can stick a motor and touchscreen on it easily... :)
[00:52:43] <NickParker> but still possible imo
[00:52:56] <Chemeleon> thats why I'm thinking smartphone, hence the audio jack
[00:53:08] <Chemeleon> easy to write a control app for it, already has a touchscreen for input at the tool, etc
[00:53:36] <Chemeleon> while I dont think I'd trust it for something like a cnc router or mill, for something simple and low impact like this, seems very viable so far
[09:03:34] * archivist_ listens to the tumbleweed rolling by
[09:11:51] <pcw_home> https://www.youtube.com/watch?v=_UiSMyyj-Ac
[09:21:11] <archivist_> hmm.....dunno how to take that vid :)
[10:13:02] <CaptHindsight> http://www.youtube.com/watch?v=cSZfUnCK5qk We got both kinds of music
[15:51:31] <ries> he guys, I created a indexer, but now looking for a program that can use the 4th axis, just simply to follow path including material removal. ideas?
[17:47:05] <CaptHindsight> never underestimate the power of cheapness http://www.kickstarter.com/projects/117421627/the-peachy-printer-the-first-100-3d-printer-and-sc