Hi all

I have a small production machine which I want to upgrade to servo, I am choosing to go with dc as even though ac has become more affordable, I would rather spend the extra $$ on my bigger toys and fit them with ac. Any chance any have you have used copley's as well as the G320X's? Being from South Africa there is not much to choose from in this line except import yourself, then again you want to know as much as possible before purchasing a product. I currently have two Copley's in working condition but what bothers me is  that the manual states that the max PWM switching of 22khz. I don't know if this will be fast enough to get max rpm out of the motors with 2500ppr encoders on them. I am using a CSMIO IP-M controller which gives me 125khz = 3000rpm with a 2500ppm encoder but will the drives handle this?

Kind regards

I've used Geckos for years, and never had a problem.  No experience with Copleys.  However, I fail to see the connection between PWM frequency and encoder counts - they're pretty much unrelated.  I don't even know what the PWM rate for the Geckos is, but I run mine with 20,000 PPR on two axes, 20,320 on a third, and 96,000 on a fourth.  All work just fine.  I think perhaps you're imagining a problem where none exists.

Regards,
Ray L.