Replacement Of The Timing Belt - Epson T-B Series Maintenance Manual

11.2 Replacement of the timing belt

Maintenance
part
Tools
Material
NOTE
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).
Refer to removal steps to move the shaft down to its lower limit before the replacement
procedure.
Z belt (1) Remove the Joint #3 motor unit.
Removal
(2) Unscrew the spline plate mounting screws.
(1) Pass a new Z belt through the shaft.
Z belt
Installation
(2) Lower the spline plate with the Z belt placed around the spline plate pulley. Secure
(3) Mount the Joint #3 motor unit.
T-B series Maintenance Manual Rev.1
Name
Width: 9 mm
Z belt
Width: 10 mm
Width across flats:
Hexagonal 2.5 mm
wrench
Width across flats: 3
mm
Torque wrench
Cross-point screwdriver (No. 2)
Force gage
Suitable cord (Length about 800mm)
Wire tie
Reference: 11.1 Replacing Joint #3 Motor "Joint #3 motor Removal"
3-M4×12
Holding the spline plate upward, pull out
the Z belt.
the spline plate with three screws.
Secure temporarily the spline plate on the Arm #2 and move the shaft up and down
several times before securing the spline plate.
Reference: 11.1 Replacing Joint #3 Motor "Joint #3 motor Installation"
T3-B T6-B Maintenance 11. Joint #3
Quantity
1 T3-B: 1554773
1 T6-B: 1563316
1 For M3 screw
1 For M4 screw
1
1 For cross-recessed screw
1 Z: Belt tension 69N (7.0±0.5kgf)
1 For belt tension
-
Shaft
Z belt
Note
Spline plate
93