Replacing PMDX122

[digger]

For sometime I am using all four ports of PMDX122 as I slaved one of the axis. Now, I would like to add 4th axis and I need another port. What would be your suggestion for simple, not expensive transitions from PMDX122 to something else with 5 or more ports?

Thanks,
Milos

[Steve Stallings]

In many cases it is possible to connect the master and slave axis to the same step and direction terminals on the PMDX-122. The PMDX-122 outputs will normally drive two stepper motor drivers without problem.

If the slave motor needs to turn the opposite direction, you can accomplish this by reversing the wires on ONE coil of the stepper motor.

If you are using gantry squaring with separate home switches for master and slave axis this approach cannot be used.