Maintenance 7. Joint #3
250
C8 Rev.13
7.3 Joint #3 - Replacing the Timing Belt
Name
Qty.
Note
Maintenance
Parts
Timing belt
(Joint #3)
C8-A701*** (C8)
1
471 mm
1655915
C8-A901*** (C8L)
1
480 mm
1655918
C8-A1401*** (C8XL)
1
501 mm
1655919
Belt tensile jig*
1
1674582
Tools
Hexagonal wrench
(width across flats: 3 mm)
1
For M4 hexagon socket head cap bolt
Cross-point screwdriver (#2)
1
For cross recessed head screws
Torque wrench
1
For tightening torque control
Cloth (cushioning)
1
For pressing arms
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.
When removing the Joint #3 motor, tilt the Arm #2 and press it against the Arm #2.
Reference:
Maintenance: 7.1 Joint #3 - Replacing the Motor,
Removal step (2)
When pressing the arm, put a piece of cloth or a similar material between the arms to avoid contacting each
other. This protects the arm surfaces from scratching and paint peeling off.
Removal: Joint #3 Timing belt
1.
Follow Removal steps (1) through (4) of
Maintenance: 7.1 Joint #3 – Replacing the Motor
.
2.
Loosen the Joint #3 motor unit set screw.
Hexagon socket head cap bolts: 3-M4×20
(with a plain washer)
3.
Remove the Joint #3 timing belt.
Installation: Joint #3 Timing belt
1.
Pass the Joint #3 timing belt around the pulley 1 and the pulley 2 of the Joint #3.
Pass the timing belt to the pulley 2 first, then, place the timing belt to the pulley 1.
2.
Secure the Joint #2 motor unit.
For details, refer to
Maintenance: 7.1 Joint #3 – Replacing the Motor
, Installation steps (5) to (6) and
(9) to (10).
Summary of Contents for C8 Series
Page 1: ...Rev 13 EM208R4413F 6 Axis Robots C8 series MANIPULATOR MANUAL ...
Page 2: ...Manipulator manual C8 series Rev 13 ...
Page 8: ...vi C8 Rev 13 ...
Page 14: ...Table of Contents xii C8 Rev 13 ...
Page 16: ......
Page 31: ...Setup Operation 2 Specifications C8 Rev 13 17 2 4 Outer Dimensions Unit mm 2 4 1 C8 A701 C8 ...
Page 32: ...Setup Operation 2 Specifications 18 C8 Rev 13 2 4 2 C8 A901 C8L ...
Page 33: ...Setup Operation 2 Specifications C8 Rev 13 19 2 4 3 C8 A1401 C8XL ...
Page 49: ...Setup Operation 3 Environment and Installation C8 Rev 13 35 C8 A901 C8L ...
Page 98: ......
Page 183: ...Maintenance 4 Cable Unit C8 Rev 13 169 4 2 Connector Pin Assignment 4 2 1 Signal Cable ...
Page 184: ...Maintenance 4 Cable Unit 170 C8 Rev 13 ...
Page 185: ...Maintenance 4 Cable Unit C8 Rev 13 171 ...
Page 186: ...Maintenance 4 Cable Unit 172 C8 Rev 13 4 2 2 Power Cable C8 A701 C8 C8 A901 C8L ...
Page 187: ...Maintenance 4 Cable Unit C8 Rev 13 173 C8 A1401 C8XL ...
Page 188: ...Maintenance 4 Cable Unit 174 C8 Rev 13 C8 A701 C8 C8 A901 C8L C8 A1401 C8XL ...
