Replacing The Timing Belt - Epson LS3-401 series Manipulator Manual

Maintenance 8. Arm #4

8.2 Replacing the Timing Belt

U1 belt
Maintenance
parts
U2 belt
Hexagonal wrench
Spanner
Torque wrench
Tools
Nippers
Force gauge
Suitable cord (Length about 800 mm)
* : Regarding U axis belt setting tension
Model
U1: 39N (4.0 ± 0.5 kgf)
LS3
U2: 69N (7.0 ± 0.5 kgf)
U1: 39N (4.0 ± 0.5 kgf)
LS6 (a)
U2: 69N (7.0 ± 0.5 kgf)
U1: 58N (5.9 ± 0.5 kgf)
LS6 (b)
U2: 102N (10.4 ± 0.75 kgf)
■ 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)
CAUTION
If exceeding the upper limit
NOTE
LS3: A brake is mounted on the Joint #3 motor to prevent the shaft from lowering down

LS6: 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.
126
Name
width 10 mm
width 16 mm
width 15 mm
width across flats: 3 mm
width across flats: 7 mm
Setting tension
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 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).
Quantity
1
1
1
1
1
1
1
1
S/N: L6**00****,
or Controller firmware Ver. 7.1.4.3 or earlier
S/N: L6**01**** or later,
and Controller firmware Ver. 7.1.6.0 or later
: Abnormal noise or vibration (oscillation),
decline in the life of driving parts
Note
LS3: R13B030234
LS6: 1674797
LS3: R13B030235
LS6: 1674798
For M4 screw
For cutting wire tie
U1, U2: Belt tension *
For belt tension
Note
LS Rev.10