Motion Axis Gearing (MAG)

[oldnerd 3]

Has anyone had any experience with motion axis gearing on Kinetix 5500 Drive with VPL servo motor. I have a project with a 5370 L33 ERS compact logix controller, one of the items we are doing is tapping a drilled hole. I have set it up to do an approach with one servo with a MAM command then MAG the other servo as the master. It is to tap, MAS, then return, un-link and go home. When I tap the hole it will tap about six holes flawlessly then on the seventh hole it starts its tap and when it stops to reverse it faults the axis when the axis goes to reverse after MAS. The fault that I receive is Feedback past factory limit. I also found that every time this happens I find 6 data packets lost. Any ideas would be helpful. Thanks

[oldnerd 3]

Found the problem today, ran a ground wire out to the ground rod from the panel ground bar. No more packet loss. This surprised me because I was very careful to install a braided ground to the Kinetic drives.