The fact that it is the same regardless of move, might indicate it is a backlash issue?
Are a series of consecutive moves in one direction correct?
I always thought the EXE units were differential output?
It is not that usual to use tach feedback now, I run all my A-M-C analogue drives in the torque mode, as suggested by A-M-C and by the controller I am using, although which is Galil, but the principal is similar?
Al.