We will be supporting slaved motors very soon, most likely next week. The homing support that we are working on will have a restriction that you can only use one homing switch on the axis with slaved motors, and in the Mach4 configuration you must assign that one home switch to both motors in the slaved axis. A future enhancement to the homing functions will support separate home switches for each motor.
FYI, the current version of our plug-in will allow you run slaved motors as long as you don't try to home the axis with slaved motors (i.e. you can jog the slaved axis or run GCode that moves the slaved axis). If you try to home the slaved axis the plug-in will issue an error and skip that axis.
To find out when we release the new plug-in you can configure your forums account to monitor the "Announcements" forum (
http://www.pmdx.com/PMDX-Forums/index.php?board=2.0). In fact, this is a good idea for anyone who has a SmartBOB-USB.
Bob