I have narrowed down a problem with my system to just a couple possible things, and the signal being output from Mach3 is looking more and more like the culprit. One way that comes to mind to determine whether or not that is the case is to simulate the Mach3 output on the parallel port in order to exercise the X axis.

I think that all I would need is the pulse train output for the charge pump, and the ability to exercise one axis. Is there anything like that available?

Thx
Scott Kelley