[mbam]

I sure appreciate the responses.

Bob, we are just north of Ft Lauderdale FL. Sure, there is no reason that just because it’s a Bridgeport there should be any problem.

I had the machine running OK, although there were some unresolved issues that I had put aside till later. I won’t go into the reasons just now, but I replaced the 3 stepper boards with new drives. The new drives are losing steps (well I assume they are losing steps, the machine is losing position). Here is what I know:

Opto isolated inputs, require 5 v @ 7ma
The Gallil motion card supplies 5V , up to 30ma

The manufacturer of the drives has been very helpful, but we can’t find the problem.

A scope confirms that there is a pretty clean 5v square wave from the card. We are talking feed rates of 1 IPM are a problem, so it’s not speed related.

Separate issue, now that I have a scope on it I see there is a problem with the implementation of ramp up/down on the step pulses while using the handwheel for incremental jogging.

The second issue is minor, as we are dead in the water because of the first.