Epson C Series, Maintenance Manual

Page: 567 / 668

C12 Maintenance 6. Joint #2
C Series Maintenance Manual Rev.2 547
6. Apply tension to the Joint #2 timing belt and fix Joint #2 motor
unit.
Joint #2 timing belt tension: 58 to 95 N
Belt tension meter setting values
Weight: 4.0 g/mm width × m span, Width: 14 mm,
Span: 146 mm
Hexagon socket set screws: 3-M5×25 (with a plain washer)
Tightening torque: 8.0
± 0.4 N·m
Regarding belt tension:
- Jumping (position gap) may occur if the value is below the lower limit.
- Vibration (abnormal noise) or reduction in life of the parts may occur if the value exceeds the upper
limit.
- When you replace with a new belt, belt extends and the belt tension may decrease in the initial stage.
Make sure to operate the robot two to three days and check the belt tension again.
When using the belt tension tensile jig (maintenance part):
Fix the belt tension tensile jig (for J1, J2, and J3) with the screws (2-
M4×35) and push the rubber against the pulley.
Tension is applied by pushing the set screw (M6
× 25) with the
rubber.
7. Install the brake power supply.
Cross recessed head screws with captive washer: 2-M3×6
Tightening torque: 0.45
± 0.1 N·m
8. Connect the following connectors.
Connectors: X121, X021, BT2, BR021

NOTE