Epson G Series Maintenance Manual page 308

G6 Maintenance 8. Joint #4
NOTE

When tightening hexagon socket head cap bolts, refer to the 2.4 Tightening Hexagon Socket
Head Cap Bolts.
U1 belt (1) Set the U1 belt around the U1 pulley and U2
Installation
(2) Set the U2 belt around the U3 pulley and U2
(3) Loosely secure the Joint #4 intermediate shaft
NOTE

(4) Apply the proper tension to the U2 belt, and then
290
large pulley (upper side) so that the gear grooves
of the belt are fit into those of the pulleys
completely.
small pulley so that the gear grooves of the belt
are fit into those of the pulleys completely.
unit, Joint #4 motor unit to Arm #2 in this order.
Make sure that the gear grooves of the belt are
fit into those of the pulleys completely.
Loosely secure the units to Arm #2 so that the motor unit can be moved by hand, and
it will not tilt when pulled. If the units are secured too loose or too tight, the belt will
not have the proper tension.
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.
U1 belt
U2 large pulley
U1 pulley
U2 belt
U3 pulley
U2 small pulley
Joint #4
Joint #4
Intermediate
motor unit
shaft unit
6-M4×12 + Washer
U2 belt tension = 130 N (13.2 kgf)
Joint #4
Intermediate
shaft unit
Force gauge
2-M4×12 + Washer
G series Maintenance Rev.3