Quote Originally Posted by Fivetide View Post
I thought it would be ok ?
Nope, you need a stepper driver.

It's perfectly possible to drive the step/dir signals into multiple drivers - probably preferable to driving potentially unmatched motors in parallel (and offers a choice of multiple supplies if the load becomes an issue), but its a cost balance for your solution.

FWIW - the motors you spec'd - 2A per phase, I guess 2 phase - that's potentially 4A per motor holding current, so you have to be very aware of driving these in parallel.

Speed and direction control are then determined by the state of the dir signal (CW or CCW) and the frequency of the Step line. You could knock up a speed controller using an Arduino Uno or similar and a few lines of C code, and for relatively little extra cost have a full digital control set-up. Happy to give you more info if you want.