Epson T-B Series

T3-B T6-B Maintenance 12. Joint #4
104 T-B series Maintenance Manual Rev.1
12.2 Replacement of the timing belt
Name Quantity Note
Maintenance
part
U belt
Width: 17 mm
1
T3-B: 1709608
U1 belt
Width: 10 mm
1
T6-B: 1674797
U2 belt
Width: 15 mm
1
T6-B: 1674798
Tools
Hexagonal
wrench
Width across flats:
2.5 mm
1 For M3 screw
Width across flats: 3
mm
1 For M4 screw
Torque wrench 1
Cross-point screwdriver (No. 2)
1
For cross-recessed screw
Force gage 1
Tension
U: 69N (7.0±0.5 kgf)
U1: 58N (5.9±0.5 kgf)
U2: 102 N (10.4 ± 0.75 kgf)
Suitable cord (Length about 800 mm)
1
For belt tension
CAUTION
■
The belt must be installed with proper tension; otherwise the
following problems
may occur.
If falling below the lower limit : Jumping of the belt gears (position gap)
If exceeding the upper limit : Abnormal noise or vibration (oscillation),
decline in the life of driving parts
A brake is mounted on the Joint #3 motor to prevent the shaft from lowering down due to the
weight of the end effector while the power to the Manipulator is OFF or while the motor is
in OFF status (MOTOR OFF).
Move the shaft down to its lower limit before the replacement procedure following the
removal steps.

NOTE