lee
i have nema 23 3nm motors, on pm542 drivers from zapp driving them with 40v power supply , they work really well together , 4.2 amps parallel , tried to run those motors at 2.5 amps 24v, before i upgraded .
waste of time and money, to slow and motors stalling. now have plenty speed and torque .......... maybe have to upgrade machine now. at £35 you cant go wrong