Replacing The Brake - Epson LS-B Series Maintenance Manual

LS20-B Maintenance 8. Joint #4

8.3 Replacing the Brake

Maintenance
Electromagnetic brake
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 Brake (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.
312
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 Joint #3 and #4. When the brake release
switch is pressed, the respective brake for Joints #3 and #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.
Qty. Note
1 1803965
1 For M3 set screw
1 For M4 screw
1 For M5 screw
2 For M4 bolt, M4 nut
1 For M4 screw
1
LS-B series Maintenance Rev.1