Epson C Series - Joint #5 - Replacing the Electromagnetic Brake

C8 Maintenance 9. Joint #5
C Series Maintenance Manual Rev.2 379
Removal: Joint #5 Timing belt
1. Turn OFF the Controller power.
2. Remove the Arm #4 side cover.
For details, refer to C8 Maintenance: 3. Covers.
3. Loosen the Joint #5 motor unit set screws.
Hexagon socket head cap bolts: 2-M4×15
(with a plain washer)
4. Remove the Joint #5 timing belt.
Installation: Joint #5 Timing belt.
1. Pass the Joint #5 timing belt around the pulley 1 and the pulley 2 of the Joint #5.
2. Secure the Joint #5 motor unit.
For details, refer to C8 Maintenance: 9.1 Joint #5 – Replacing the Motor, Installation steps (5) to (6) and
(11) to (12).
9.4 Joint #5 - Replacing the Electromagnetic Brake
Name Qty. Note
Maintenance
Parts
Electromagnetic brake
1
2172928 (Common for Joints #4, #5, #6)
Belt tensile jig
1
1674582
Tools
Hexagonal
wrench
width across flats: 2 mm
1
For M4 hexagon socket set screws
width across flats: 2.5 mm
1
For M3 hexagon socket head cap bolts
width across flats: 3 mm
1
For M4 hexagon socket head cap bolts
Cross-point screwdriver (#2)
1
For cross recessed head screws
Torque wrench
1
For tightening torque control
Spanner (width across flats: 8 mm)
1
For air tube fitting
Feeler gauge (0.5 mm)
1
For adjusting the pulley position
Belt tension meter
1
Refer: Unitta U-505
* The belt tensile jig is an assembly jig. Use the jig when adjusting belt tension.
The brake is mounted on each joint to prevent the arm from lowering due to its own weight while the
Controller power is OFF or the motor is OFF status. The brake does not work during replacement.
Be careful when performing maintenance work.