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5 Maintenance and Inspection
(3) Replacing the J3 axis timing belt
The procedure for replacing the J3 axis timing belt is shown below. The diagram shows an image of the removed
No. 2 arm cover U.
After replacing the J3 axis timing belt the resetting the origin of J3 and J4 axis is necessary.
1) Move the J3 axis to the position lowered about 30mm from the upper limit by jog operation. This position makes
the space for removing the belt.
After moving the J3 axis turn the controller's power supply OFF.
2) Refer to
Page 72 "Fig. 5-3: Installing/removing the
3) Loosen the nut of tension adjustment screw <1>, and loosen the tension adjustment screw <1>.
4) Remove three fixing screws <2>, remove the J3 axis motor <3>.
<1> Tension
adjustment screw
Loosen the nut
and screw
<2> J3 axis motor fixing
screw
Remove
5) Remove the timing belt <4> from the timing pulley A <5>.
Maintenance and inspection procedures
5-79
<3> J3 axis motor
<5> Timing pulley A
<5> Timing pulley A
cover", and remove the No.2 arm cover U.
* Move the J3 axis to the position
lowered about 30mm from the upper
limit previously.
<2> J3 axis motor fixing screw
<2> The J3 motor fixing screws are in
three places.
<6> Timing pulley B
<4> Timing belt
<4> Timing belt
Remove from the timing
pulley A <5>.
Remove
J3 axis motor
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