I have a denford triac with original stepper setup, so standard nema34 steppers, controlled via digiplan drivers, connected to a pmdx26 via a home made 5v to 24v board.

so I don't have micro stepping, which I would like. my current max speed is 1200mm/m which is pretty slow.

so I want to increase steps and speed up

two of the stepper motors are 25 years old