Epson LS-B Series Maintenance Manual page 322

LS20-B Maintenance 8. Joint #4
U belt (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 bundling the motor cables.
(6) Disconnect the following connectors.
(7) Remove the User Plate and the Duct Plate.
(8) Remove the screws mounting the Joint #3 motor
308
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.
Cut off the wire tie fixing the cables to the belt tensioner.
Do not cut the wire tie (in the duct fittings outlet) that binds the cables to the duct
plate.
Removed parts will be used again. Be careful not to lose them.
Duct Plate
Connectors: X231, X241, X43, X44, X51, BR3, BR4
(Hold the clip to remove.)
For details, refer to 3. Covers.
unit.
Remove the Joint #3 motor from the motor plate
and pull out the Z belt.
For details, refer to 7.2. Timing Belt.
Clip Band
Silicon Sheet
Wire Tie
Duct Plate
Clip Band
User Plate
Belt Tensioner
Joint #3
Motor Unit
3-M5×20
+ washer for
slotted hole
LS-B series Maintenance Rev.1