Re: [CAD_CAM_EDM_DRO] Tuning steppers

> From: "Darrell" <dgehlsen@...>
> YES to both questions. I am using a K6 II 400 to play with the stepper
> version. I want to try it on a servo machine. I have a BOSS 8 that I am
> trying to see if I can use the original drives or if I will need to replace
> them in order to work with EMC. I hope to be able to use the original

drives

> as the machine is in working condition and the drives are 30 amp + drives
> that switch at 16 K(the outputs are capable of 50 amps but at 16 K

switching

> are real whiners).

Are these the CSR NC400 drives? If so, I think they have a +/-10Vdc control
input and should work fine with the EMC and a Servotogo card. I agree about
the whining though, it's almost bad enough to spend the money for new amps...

> When you say the last machine runs ok, what speed are you talking about? I
> am used to getting 120 IPM rapids and at least 90 IPM feeds with my kit.

54IPM feed or rapid. You will probably do better because you are running the
original BP drives (I had Microkinetics 8010's in half step mode) which are
probably a better match for the Superior/Sigma motors, plus you'll have
.0005" or .001" steps where I had .00025" ones. You'll want to get this
spreadsheet:

http://users.erols.com/mshaver/stepfreq.xls

To set the PERIOD variable:

#cd /usr/local/nist/emc/src/emcmot
#emacs emcfreqmot.c

Scroll down until you find a line that says:

static int PERIOD=20;/* fundamental period for time interrupt */

Change this to PERIOD=12 or so to start.
<Ctrl-x><Ctrl-s> saves the file, <Ctrl-x><Ctrl-c> quits emacs.

#make PLAT=rtlinux_09J all

I'll give you a call later (left you a message a little while ago due to the
time difference) to see how you're doing.

Matt