Replacing The Timing Belt - Epson LS-B Series Maintenance Manual

7.2 Replacing the Timing Belt

Maintenance
Z belt
parts
Hexagonal
wrench
Torque wrench
Cross-point screwdriver (#1)
Tools
Nippers
Sonic tension meter
Force gauge
Suitable cord (Length about 800 mm)
Material Wire tie
LS3-B: A brake is mounted on the motor of Joint #3 to prevent the shaft from moving down
NOTE

LS6-B: A brake is mounted on the motor of Joints #3 and #4 to prevent the shaft from
Move the shaft down to its lower limit before the replacement procedure following the
removal steps.
Z belt (1) Turn ON the Controller.
Removal
(2) Push down the shaft to its lower limit while pressing the brake release switch. Be sure
(3) Turn OFF the Controller.
(4) Remove the Arm Top Cover.
(5) Cut off the wire tie binding the cables.
LS-B series Maintenance Rev.1
Name
width across flats: 2.5 mm
width across flats: 3 mm
due to the weight of the end effector while the power to the Controller is OFF or
while the motor is in OFF status (MOTOR OFF).
moving down and rotating due to the weight of the end effector while the power to
the Controller is OFF or while the motor is in OFF status (MOTOR OFF).
to keep enough space and prevent the end effector hitting any peripheral equipment.
LS3-B: The brake release switch is applied to Joint #3.
When the brake release switch is pressed, the respective brake of the Joint #3 is
released.
Be careful of the shaft falling while the brake release switch is being pressed
because the shaft may be lowered by the weight of an end effector.
LS6-B: The brake release switch is applied to both Joints #3 and Joint #4.
When the brake release switch is pressed, the respective brakes of the Joint #3
and Joint #4 are released simultaneously.
Be careful of the shaft falling and rotating while the brake release switch is being
pressed because the shaft may be lowered by the weight of an end effector.
For details, refer to 3.1 Arm Top Cover.
Cut off the wire tie binding the Joint #3 brake cable.
Do not cut off a wire tie that binds the cables to the User Plate.
LS3-B LS6-B Maintenance 7. Joint #3
Qty.
LS3-B: 1554773
1
LS6-B: 1563316
1 For M3 screw
1 For M4 screw
1
1 For pan head screw (small)
1 For cutting wire tie
Z: Axial tension (pulling force):
1
69N (7.0 ± 0.5 kgf)
1 For belt tension
-
Note
57