Epson LS-B Series Maintenance Manual page 191

When tightening hexagon socket head cap bolts, refer to the 2.4 Tightening Hexagon Socket
NOTE

Head Cap Bolts.
Z belt (1) Pass a new Z belt through the shaft.
Installation
(2) Lower the spline plate with the Z belt
(3) Mount the Joint #3 motor unit back in the arm.
(4) Pass the brake cable and over-excitation
(5) Loosely secure the Joint #3 motor unit to the
NOTE

(6) Apply the proper tension to the Z belt, and
LS-B series Maintenance Rev.1
placed around the spline plate pulley.
Secure the spline plate with 3 screws.
Loosely secure the spline plate on the Arm
#2 and move the shaft up and down several
times before firmly secure the spline plate.
power supply through the Z belt.
Place the Z belt around the Z1 pulley and Z2
pulley, with the gear grooves of the belt
fitting into grooves of the pulleys completely.
Arm #2.
At this point, make sure that the Joint #3 motor unit can be moved by hand, and it
will not tilt when pushed by tensioner. If the unit is secured too loose or too tight,
the belt will not have the proper tension.
then secure the Joint #3 motor unit.
Install the tensioner in front of the Joint #3
motor unit. Rotate the hexagonal bolt of
the tensioner and push the plate to apply the
specified tension.
Z belt tension
69 N (7.0 ± 0.5 kgf)
(6)-1 Loosen the nut and turn the bolt. Push in the Joint #3 motor unit.
(6)-2 After fixing the Joint #3 motor unit, turn the bolt to leave from the plate.
(6)-3 Check the tension using the sonic tension meter.
For details, refer to 7.4 Checking the Timing Belt Tension.
(6)-4 Repeat the steps (6)-1 through (6)-3 until you get appropriate tension.
(6)-5 After the adjustment, put the bolt back to its original position and fix it with
the nut.
LS10-B Maintenance 7. Joint #3
Spline Plate
3-M4×15
Z belt
Joint #3
3-M4×18+Washer
Motor Unit
Plate
Bolt
Nut
Tensioner
177