I'm using Mach 4 and a PMDX SmartBOB. I finally got my Z-Axis running correctly, and I was in the process of calibrating it when I discovered that no matter what value I put in the backlash compensation field it didn't make any difference in my backlash.

After doing some research I discovered that Mach 4 doesn't really do any compensation for backlash at all, and have instead thrown this down to the plugins to handle. The field in the motor controller section of the configuration tab just collects the information, but does nothing with it.

PMDX lists this as a "Known Issue" (PMDX-SmartBOB-USB Mach4 Plug-In Release Notes) in their release notes, but have not produced a fix for it despite having it in their known issues list for over 2 years.

This is extremely frustrating. I really don't want to go backwards to Mach 3, and I've put a lot of money into the PMDX Board.

Question: does anyone have a recommendation on how to get around this? The backlash is more than I'm willing to accept.