[ESjaavik]

I have just connected up PacSci 902 servo drives to a motor.
It is confused about where it is.

Usually it oscillate between two positions some 30-50 degrees apart. If it settles, I can make it oscillate by just turning slightly on the shaft.

I've been there several times before with other drives. Then it was fixed by just swapping two motor leads, indicating that it could not hit the target position because it went in the wrong direction when correcting it. It didn't work this time.

Anyone have some rules for debugging that tells what cnages to make based upon the behaviour?

And no, I'm not just guessing. The motor and drive is connected using the documentation for them both. The motor works fine with another drive brand, so there should be nothing wrong with it.