Mach4 and our plug-in make no assumptions about the mechanical configuration
of your machine, even when you ask for slaved motors.
For a gantry with rack and pinion drive and a slaved motor, you will need to
tell the software that you want one motor reversed.
You can do this in our plug-in using the Mach4 functions Config>Plugins> and then
click on the Configure button to the right of the line showing PMDX-SmartBOB-USB.
In the PMDX-SmartBOB dialog that pops up, select the Motor Config tab.
In the chart for Step/Dir Configuration find your slaved motor and click on button for
Normal or Reversed under the DIR Polarity heading as required for the slave motor.
The same reversing selection will also appear in the Mach4 menus under Config>Mach
and select the Motors tab. You need to select the slave motor in the column on the
right and then Check or Uncheck the box labeled Reverse near the bottom right of
the dialog box.
Both the PMDX dialog and the Mach dialog manipulate the same setting and changing
one will change the other. This is done to avoid having to guess which one to use.