Epson LS-B Series Maintenance Manual page 95

(4) Loosely secure the Joint #4 motor unit to
(5) Apply the proper tension to the U1 belt, and then secure the Joint #4 motor unit.
NOTE

(6) Connect the connectors.
(7) Bind the cables with a wire tie in their original position as before removed in the
(8) Remove the User Plate.
(9) Install the Arm Top Cover.
LS-B series Maintenance Rev.1
Arm #2.
Make sure the motor unit can be moved by
hand, and it will not tilt when pulled.
If the unit is secured too loose or too tight,
the belt will not have the proper tension.
Pass a suitable cord or string around the Joint #4 motor unit near its mounting plate.
Then, pull the cord using a force gauge or similar tool to apply the specified tension
shown in the figure on the right.
LS3-B:
U1 belt tension: 19.5N (2.0 ± 0.5 kgf)
Axial tension (pulling force): 39 N (4.0 ± 0.5 kgf)
LS6-B:
U1 belt tension: 28N (2.8 ± 0.5kgf)
Axial tension (pulling force): 56 N (5.7 ± 0.5 kgf)
To check belt tension with the tension meter, refer to 8.4 Checking the Timing Belt
Tension (U1, U2 Belts).
Connector X241, X41
removal step (5).
For details, refer to 3.5 User Plate.
For details, refer to 3.1 Arm Top Cover.
LS3-B LS6-B Maintenance 8. Joint #4
Joint #4
Motor Unit
Force
Gauge
3-M4×12
+Washer
Joint #4
Motor Unit
3-M4×12
+ Washer
81