VT6L Maintenance 12. Joint #4
VT series Maintenance Manual Rev.2 97
the timing belt through the motor pulley and
oosely secure to the Arm #3.
Hexagon socket head cap bolts: 3-M4×18
(with slotted hole washer)
Make sure that the gear grooves of the timing belt are fit into those
of the pulley
When securing the motor unit loosely, make sure that the motor unit
can be moved
by hand and it does not tilt
when being pulled. If the unit is secured too loose or
too tight, the belt will not have
proper tension.
The direction to install the motor is the
direction in which the connector of the
motor faces downward
.
Be careful for the
installation direction
Apply proper tension to the motor unit and fix it.
Joint #4 timing belt tension: 23 - 36 N
Belt tension meter setting values
Weight: 2.5g/mm width×m span
Width: 6.0mm
Span: 45mm
Hexagon socket head cap bolts: 3-M4×18 (with slotted hole washer)
Tightening torque: 4.0 ± 0.2 N·m
Jumping (position gap) may occur if the value is below the lower limit.
Vibration (abnormal noise) or reduction in life of the parts may occur if the value
exceeds the upper
limit.
When you replace with a new belt, belt extends and the belt tension may decrease in the
initial stage.
Make sure to operate the robot two to three days and check the belt
tension again
Mount the plate on the Arm #3.
Hexagon socket head cap bolts with
captive washer: 2-M4×12
Tightening torque: 4.0 ± 0.2 N·m
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