Quote Originally Posted by andy_con View Post
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
Well in that case I'd give C-loop a miss because pretty sure all the 34 motors are 2 phase motors. Those you linked to are Nema 23 and only 2nm.

If you buy Am882 drives for around £50-60 each and fit motors below and run them around 70Vdc you'll transform the machine. In fact just the drives alone and some more voltage will make big difference.

https://www.cnc4you.co.uk/Stepper-Mo...4808-02-Nema34