Quote Originally Posted by John S View Post
Many of the so called high torque motors are high voltage low amps like 5.4 volts at 2.1 amps, this puts that motor expecting 108 to 135 volts, something that's not obtainable with current drives.
I hope I'm getting that and more with Gary's "plug it straight in to the mains" drivers, but you can't switch the current below 3.18 Amps rms

The first worry with them was the heat, but I'm getting used to that, doesn't seem to worry the motors.

New problem is the noise, set at 800 steps per rev they make it clear I'm not letting them get anywhere near the sine wave they want to do. Working on it

Stepper perfection is a never ending series of upgrades :whistling: