Re: [CAD_CAM_EDM_DRO] HELP ! on Westamp servo drives.

"Ward M." wrote:

> Jon E.,
>
> Well, I guess I'll give it a try. I'm a little worried about running out of
> travel during tuning when using your method. What do you think about using
> a square wave with someone there to adjust the DC offset so the carriage
> stays centered on the bed during testing? The servos that I'm accustomed to
> tuning were not in the full horsepower plus range, and I'd hate to hit a
> hard stop and kill something. The rapid is probably only 200 ipm or so, but
> that looks pretty fast on a six inch X and maybe a eighteen or twenty inch
> Z. I guess I'm just a little nervous getting into a twenty plus year old
> system trying to make things better, not worse. Electronics didn't seem
> quite as durable back then.

I used a DSO, so I only had to make one move, look at the trace and decide
what pot to tweak, and try again. I made the moves with manual jogs.
I think you'll quickly go nuts if you try to do it with a plain oscilloscope,
as you need a trace of about 100 mSec / division. by the time the beam
hits the end of the screen, the picture is gone.

Jon