On my homemade cnc-machine I have connected two stepper motors on the x-axis. Both steppers are controlled from one output one the controller pcb. Seems to have worked rather well for a long time.
What suprised me was that I one day rotated one stepper by my hand,
and the other one was following, without any power being connected.
Since I work in the electrical-business I know about motors and generators and stuff, but steppers are unfamiliar.
Even when moving rather slowly and only a few degrees, the other one followed.
So my question is: Is it not a good idea hooking two steppers in parallel?
Or can I connect some diodes "somewhere" to prevent the motors running each other?
I don't know if this is a "problem" when they are running by the pc.
I have had incidents where it seems like they don't cooperate. But I have thought it was more like mechanical related problems, but maybe this is a part of the problem..