Epson G Series Maintenance Manual page 185

(6) Loosely secure the Joint #4 intermediate
(7) Place the Joint#4 motor unit around the
(8) Loosely secure the Joint #4 motor unit to
(9) Loosely secure the spline plate to Arm #2.
(10) Apply the proper tension to the U2 belt, and
(11) Apply the proper tension to the U1 belt, and
G series Maintenance Rev.3
unit with screws.
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.
U1 belt. Put the Joint #4 motor unit on
the Arm #2 top surface.
Put the Joint #4 motor cable toward the
end of Arm #2.
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.
After moving the shaft up and down several times, secure the spline plate to Arm #2.
then secure the Joint #4 intermediate shaft unit.
To do so, pass a suitable cord or string around
the Joint #4 intermediate shaft 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.
then secure the Joint #4 motor 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
shown in the figure on the right.
G3 Maintenance 8. Joint #4
Joint #4
motor unit
3-M4×12 + washer
Joint #3
motor unit
Joint #4
intermediate shaft
3-M4×12
+ washer
3-M4×12 + washer
Joint #4
motor unit
U1 pulley
U2 pulley
U2 belt
U1 belt
U2 belt tension = 98 N (10 ± 1 kgf)
Force gauge
Joint #4 intermediate shaft
3-M4×12 + washer
U1 belt tension = 74 N (7.5 ± 0.5 kgf)
Joint #4
motor unit
3-M4×12
+ washer
Force gauge
167