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LS20-B Maintenance 8. Joint #4
8.1 Replacing Joint #4 Motor
Maintenance
AC Servo Motor 150 W
part
Hexagonal
wrench
Tools
Spanner
Cross-point screwdriver (#2)
Torque wrench
A brake is mounted on the motor of Joints #3 and #4 to prevent the shaft from moving down
NOTE
and rotating due to the weight of the end effector while the power to the Controller is OFF
or while the motor is in OFF status (MOTOR OFF).
Move the shaft down to its lower limit before the replacement procedure following the
removal steps.
Joint #4 motor
(1) Turn ON the Controller.
Removal
(2) Push down the shaft to its lower limit while pressing the brake release switch.
(3) Turn OFF the Controller.
(4) Remove the Arm Top Cover.
(5) Remove the clip band and sheet binding the motor
(6) Remove the User Plate and Duct Plate.
(7) Disconnect the following connectors.
302
Name
width across flats: 1.5 mm
width across flats: 3 mm
width across flats: 4 mm
width across flats: 7 mm
Be sure to keep enough space and prevent the end effector hitting any peripheral
equipment.
The brake release switch is applied to both Joints #3 and Joint #4.
When the brake release switch is pressed, the respective brakes of the Joint #3 and Joint
#4 are released simultaneously.
Be careful of the shaft falling and rotating while the brake release switch is being pressed
because the shaft may be lowered by the weight of an end effector.
For details, refer to 3.1 Arm Top Cover.
cables.
Removed parts will be used again. Be careful not to
lose them.
At this point, do not cut the wire tie (in the duct fittings
outlet) that binds the cables to the duct plate.
For details, refer to 3. Covers.
Connectors: X241, X41, BR4 (Hold the clip to remove.)
Qty.
Note
1
1646520
1
For M3 Set screw
1
For M4 screw
For M5 screw
1
For M4 bolt, M4 nut
1
For M4 screw
1
Wire Tie
Duct Plate
LS-B series Maintenance Rev.1
Clip Band
Silicon Sheet
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