Epson LS-B Series Maintenance Manual page 90

LS3-B LS6-B Maintenance 8. Joint #4
(6) Apply the proper tension to the U2 belt, and then secure the Joint #4 intermediate
NOTE

(7) Mount the Joint #4 motor unit on the
(8) Loosely secure the Joint #4 motor unit
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shaft unit.
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.
LS3-B:
U2 belt tension: 34.5N (3.5±0.25 kgf)
Axial tension (pulling force): 69N (7.0 ± 0.5 kgf)
LS6-B:
U2 belt tension: 62.5N (6.3±0.5 kgf)
Axial tension (pulling force): 125N (12.3 ± 0.5 kgf)
To check belt tension with the tension meter, refer to 8.4 Checking the Timing Belt
Tension (U1, U2 Belts).
Arm #2 with the U1 belt around the
pulley.
to the 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.
Joint #4
Intermediate Shaft Unit
Force gauge
Joint #4
Motor Unit
LS-B series Maintenance Rev.1
3-M4×12
+ Washer
3-M4×12
＋Washer