#emc-devel | Logs for 2006-04-24

[01:31:58] <jepler_> jepler_ is now known as jepler
[13:37:43] <rayh> cradek, Nice job on the threading, Chris.
[13:38:26] <rayh> I'm hoping to have what the industry calls "go/nogo" gages at fest so we can prove the thread is good.
[13:39:51] <cradek> sounds interesting
[13:40:28] <cradek> I know the pitch is right, so I suppose it's just a matter of figuring out the correct depth for your gauges to work
[13:40:37] <rayh> Don't know what size gages I can get.
[13:41:01] <rayh> And they won't be NIST certified but should be good enough for us.
[13:41:30] <cradek> I know what go/nogo gauges are like for slots etc, are these that you're talking about just like two nuts?
[13:41:41] <rayh> You like the Sherline?
[13:42:08] <cradek> yeah, I was surprised that it's much bigger than mine
[13:42:11] <rayh> Yes. Very similar. One nut must go on all the way the other less than a 1/4 turn.
[13:42:44] <rayh> They test max and min pitch and major and minor diameters.
[13:42:46] <cradek> the wiring was a mess but I removed it (kept it intact) and redid it for emc2
[13:43:20] <rayh> Fantastic test bed for this stuff.
[13:43:25] <cradek> yes
[13:43:50] <cradek> maybe I'll be able to get spindle speed control working too, so we can work on constant surface feed
[13:44:00] <rayh> Does this use the mightydrive
[13:44:05] <cradek> yes
[13:44:06] <rayh> or your own.
[13:44:13] <rayh> Okay. I know it then.
[13:44:37] <rayh> CSS would really get us close to full lathe ability.
[13:44:56] <cradek> yeah, other than that, it's just interpreter work I think
[13:45:10] <rayh> Looks like it to me.
[13:45:44] <cradek> how is your little lathe equipped? Can it do speed control?
[13:45:52] <rayh> Smithy has two sizes of small lathes for retrofit.
[13:45:57] <rayh> No. Not as is.
[13:46:48] <rayh> We might be able to find analog controlled dc drives that would work.
[13:47:14] <cradek> there is something on fred's sherline but it's a bit of a mystery to me
[13:47:22] <rayh> I've got several old GE drives in the shop but the caps are bad.
[13:47:34] <rayh> got a pic?
[13:47:41] <cradek> nope
[13:47:51] <cradek> I think it takes a 0-12v analog input
[13:48:01] <rayh> odd
[13:48:14] <cradek> I might be able to pull off 0-5 using hal freqgen, which might be enough for testing
[13:49:19] <cradek> ideally, I also need to get at least the home switches working
[13:49:43] <rayh> Did Matt put home switches on this?
[13:49:54] <cradek> someone put full switches on it
[13:49:57] <rayh> I know he did it for NIST's mill
[13:50:20] <cradek> I think that's the one I have
[13:50:46] <rayh> okay.
[13:51:06] <cradek> unfortunately there aren't enough inputs for all the switches and the encoder without some rewiring
[13:51:36] <cradek> (I hate to mess up the existing wiring too much)
[13:52:35] <rayh> Right. How about a second parport?
[13:53:11] <cradek> I have a laptop that agrees with rtai now - I'd like to continue using that for workshop
[13:53:33] <rayh> Oh. Okay. Or I could build up a box for your testing.
[13:53:48] <rayh> Homes could be a single pin though.
[13:53:56] <cradek> right, it should be fine
[13:54:14] <cradek> I could also put all the limits together on the remaining pin, with a bit of rewiring
[13:54:25] <cradek> but if I have homes and soft limits, it'll be fine
[13:54:44] <rayh> Get one of those little Rad Shack printer jumper boxes?
[13:55:05] <cradek> yeah that's the setup already, the mightydrive inputs are not at all like the parport pinout
[13:55:06] <rayh> If they can still be found.
[13:55:16] <cradek> they had three, I bought them all
[13:55:42] <rayh> Sorry to see those boxes go away.
[13:55:55] <cradek> they appeared to have been in the store for many years.
[13:56:30] <cradek> RS will have no hobbyist stuff left soon. a bit sad, but we have mouser.
[14:25:25] <rayh> cradek, How about using one of JonE's pwm amps for that spindle motor?
[14:27:50] <rayh> Or DaveE has more of the ServoDynamics drives like we used on the Mazak.
[14:27:51] <cradek> let's figure out what it already has first... It might already be working
[14:28:34] <rayh> Okay.
[14:29:07] <cradek> so smithy will have stuff there for us to work on?
[14:30:20] <rayh> I'm trying to get a stepper mill there for Steve Stallings to test some stuff with.
[14:30:37] <rayh> I don't think the lathes will be here by then.
[14:32:39] <cradek> did you get the encoder for yours yet? I think you said you ordered it
[14:34:51] <rayh> Yes I did but used it on another job. Will order a second this week.
[14:42:59] <rayh> Or maybe not since you have that unit.
[14:44:01] <cradek> the problem will be when I have to give this back, and we don't have a cnc lathe anymore
[14:44:27] <cradek> brb
[14:46:54] <rayh> here's a cute dc drive that would work. http://www.exman.com/ecdcd.html
[14:47:18] <rayh> The external speed display would show that css was working.
[15:03:21] <cradek> cool
[15:04:05] <cradek> how does it get feedback?
[15:07:49] <rayh> looked like 0-5 volt analog
[15:11:34] <rayh> I'll ask Matt about the drive on that lathe in a few minutes. He's supposed to call.
[15:12:27] <cradek> great, any information will help
[15:13:10] <rayh> I figured that nut test jpg was a pic of me holding a multimeter with the leads in my ears.
[15:13:32] <cradek> heh nope, I'll post that one later
[15:13:44] <rayh> Right.
[16:47:46] <tomp> rayh: you around?
[16:48:41] <tomp> ray, if you get this, going to rolands wednesday, scouting out japax
[18:42:28] <alex_joni_away> alex_joni_away is now known as alex_joni
[19:16:30] <lilo> [Global Notice] Hi all. Just a reminder. Google's Summer of Code ( http://code.google.com/soc/ ) is coming up again, and the mentoring organizations have pretty much all been selected. Coder applications start on May 1.
[19:17:41] <lilo> [Global Notice] Soc has moved to SlashNet this year, but it seemed to be a good idea to have an unofficial, local channel here on freenode for mentoring groups and participants.... so we've set up ##googlesummer .... if you're involved, or hoping to be involved, with Soc 2006, please stop by. As always, be nice, be chilled, and have a great evening! :)