1. measure the phase resistor
of motor phase UVW, if not
balanced, change the motor
2. If short circuit between
UVW and PE, change the
motor 3. Measure UVW
output with multimeter (diode
gear), black pen test P+, red
pen test UVW, red pen test P-,
black pen test UVW. 6. Group
voltage any one is 0, change
the drive
1. Check encoder cable or
change it 2. Set servo to bb
state, monitor U0-10, rotate
motor shaft by hand, U0-10
increase at one direction and
decrease at another direction
(0~9999)