Epson LS20 Series User Manual

Maintenance 8. Arm #4
126 LS20 Rev.4
8.4 Replacing the Reduction Gear Unit
Name
Quantity
Note
Maintenance
parts
Reduction Gear Unit 1 1493783
Tools
Hexagonal wrench
width across flats: 3 mm
1
For M4 screw
width across flats: 4 mm
1
For M5 screw
Spanner width across flats: 7 mm 2
For M4
hexagon head bolt
and M4 hexagon nut
Cross-point screwdriver (#2)
1
For M4 screw
Torque wrench
1
Ultrasonic tension meter
1
Refer: Unitta U-508
Material
Wire tie
-
For binding cables
The brakes are mounted on the Joints #3 and #4 to prevent the shaft from moving down
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
Reduction Gear
Unit
Removal
(1)
Remove the Joint #4 motor unit from the Arm #
2.
For details, refer to the Installation steps in
Maintenance: 8.2 Replacing the Timing Belt.
2-M4×12
Joint #4 M
otor
Joint #4
Reduction Gear Unit
Screw hole for fixing
the motor shaft
(2)
Remove the Joint #4 motor from the reduction
gear unit.
Remove the
screws securing the Joint #4 motor
to
the reduction gear unit.
Remove
the cover of the hole for fixing the motor shaft on the side of the reduction
gear,
and loosen the screw. If the screw position does not match, turn the motor
slightly and move until the screw fixing the motor shaft can be seen.
After
loosening the screw, mount the cover to the hole. Pull the motor upward to
remove.
(3)
Remove the U pulley.
Joint #4
Reduction Gear Unit
6-M4×15
Pulley
(4)
Remove the plate.
Joint #4
Reduction gear Unit
Plate
4-M5×18

NOTE

Epson LS20 Series Specifications

General

Brand	Epson
Model	LS20 Series
Category	Robotics
Language	English