Epson C Series, Maintenance Manual, Page: 110 / 668

C4 Maintenance 7. Joint #3
90 C Series Maintenance Manual Rev.2
7.1 Joint #3 - Replacing the Motor (with a Brake)
The brake is mounted on the Joint #3 to prevent the arm from lowering due to its own weight while the Controller
power is OFF or the motor is OFF status. However, the brake does not work during replacement.
To replace the Joint #3 motor (with a brake), tilt the Arm #3 and press it toward the Arm #2. (See the step (2).)
When pressing the arm, put a cloth or a similar material between the arms to avoid them from contacting. This
also protects the arm surfaces and coatings.
Removal: Joint #3 Motor (with a brake)
1. Turn ON the Controller power.
2.
Tilt the Arm #3.
Put a cloth between the Arm #2 and the Arm #3 so that two arms
do not touch each other.
Protect arms
using cloth, etc.
Tilt Arm #3
3. Turn OFF the Controller power.
4. Remove the Arm #2 side cover.
For details, refer to
C4 Maintenance: 3. Covers
.
Name Quantity Note
Maintenance
Parts AC servo motor 150 W (with a brake) 1 For the part code, refer to the 17. C4
Maintenance Part List.
Noise dissipative diode 1
Tools
Hexagonal
wrench
width across flats: 2 mm 1 For M4 hexagon socket set screws
width across flats: 3 mm 1 For M4 hexagon socket head cap bolts
Cross-point screwdriver 1 For covers
Torque wrench 1
Cloth 1 For pressing arms
Force gauge 1 For belt tension adjustment
Nipper 1