Specify the Weight/Inertia setting.
Check the load.
Check the robot. (Smoothness,
backlash, non-smooth motion, loose
belt tension, brake)
Check the interference with the
peripheral equipment. (Collision,
contact)
Check the model setting.
Check the power cable connection.
Check the robot power wiring.
(Missing pin, disconnection, shortcircuit)
Check the power supply voltage.
(Low power supply voltage)
Replace the motor driver.
Replace the DMB.
Replace the motor.