
B-65235EN/02 MOTOR MAINTENANCE 1. AC SERVO MOTOR MAINTENANCE
- 85 -
The load condition in the machine is changed to
the following reasons.
The machine friction is increased for a long
time.
Reduced efficiency.
The limit to the amplifier current is listed below.
β1/3000, β2/3000, β0.5/3000, α1/3000, α2/2000,
α2/3000
12Apeak
β3/3000, β6/2000, αC3/2000, αC6/2000, αC12/2000
20Apeak
2) The waveforms has ripple during constant -
speed feeling.
3) The current waveform has ripple or jumps when
the motor is not rotating
If you find anything unusual in relation to the above items,
contact your FANUC service staff.
Rediced efficiency
Increased
friction
0
Measured
w
v
f
rm
Ripple
0
Measured
w
v
f
rm
Ripple