Output voltage from mains driver?

[A_Camera]

A_Camera, for those kinds of tests, you really need to use an oscilloscope, and you might want to see what happens when you put some extra load on an axis (even just lean on the Z axis as it runs), and at varying speeds.

Yes, I know, but I did not want to hook up my scope because I might fry it (or the driver) since it is not isolated from the mains so I might get a grounding issue. If I had a battery driven scope I would have hooked that up, but I don't.

Regarding extra load, I am not sure it matters, I believe it does matter, but just recently had a discussion about that on CNC Zone, and one person said it does not matter. Basically because steppers are not real motors, just some solenoids which are switched on and off to get the motion we want. I don't know, but I believe (have a sense) that he is wrong, current will increase (to the maximum limit set up on the driver) if the motor is under load. Maybe that will be my fourth measurement...

JW, either drive would work. If you never run the motors at high speed (or not for long periods of time), then a higher voltage should not be a problem. A higher voltage would give better acceleration/performance, but the big risk is overheating the motor. That could be counteracted by reducing the current, but then you would lose torque.

You do realise that even though the DM's are high voltage drives, you still need to provide an appropriate input voltage? So the only thing you would realistically save, is a bridge rectifier and capacitor(s), as you'd still need an appropriate transformer.

Yes, it is VERY important to use a transformer since 230VAC x 1.41 = 325V and that is VERY high for steppers and extremely dangerous to use in our DIY machines. I am not sure that the steppers will survive that, not even for short periods.