I was just thinking about firing up my control box to do some testing as it's nearly complete but I found a hole in my knowledge...

I know that you shouldn't plug in or unplug steppers while the system is powered up and running but I don't know if it's safe to run a drive (I'm using AM882's) without having a stepper attached. In other words sending it pulse and dir signals with nothing connected to the output.

I'll probably end up wiring up all four steppers anyway as I want to make sure the slaving works but I'm interested to know anyway.

Cheers :-)