I did all of the mechanical checks and they are ok. I first swaped the outputs and then swaped the servopacks themselves and the problem stayed with the one drive so I am sure I have isolated the problem to the X-axis Yaskawa CPCR-01-SD1B servopack. There are 4 pots on the drive; IN-B, CFV, SLP, and ZERO. Is there any way the drive can be tuned to be less sensitive?