I have a AX-12+ motor from the Bioloid Premium kit that also fail with
alarm when I run the motor check from the cm-510 controller.
When I change the goal position I loss the power form the cm-510 controller.
Also a second motor fail just now this one does not follow correct the goal position. When I rotate it right it start rotate left with no stop.
-Customer from UK
Please try the self check list on the web first, and tell us at which step you had the problems.
ROBOTIS