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5 Maintenance and Inspection
(5) RH-6FH/12FH/20FH series: Replacing the J3 axis timing belt
The procedure for replacing the J3 axis timing belt on the RH-6FH/12FH/20FH series 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) Refer to
Page 81 "Fig. 5-4: Installing/removing the
2) Loosen the nut of tension adjustment screw <1>, and loosen the tension adjustment screw <1>.
<3> J3 axis motor
remove
<2> J3 axis motor
fixing screw
remove
<5> Timing pulley A
3) Remove two fixing screws <2>, and remove the J3 axis motor <3>.
Remove
<2> J3 axis motor fixing screw
<5> Timing pulley A
4) Remove the timing belt <4> from the timing pulley A (motor side <5>) and B (shaft side <6>).
5) Install surely the new belt to the timing pulley (on the motor) <5> and timing pulley B <6>, and fix the J3 axis
motor <3> with J3 axis motor fixing screw <2>.
Confirms having related the timing belt <4> to the timing pulley A <5> and the timing pulley B <6> securely.
6) Adjust the tension of J3 axis timing belt with referring to
Adjusting the J3 axis timing
7) Install No.2 arm cover U securely as before.
8) Reset the origin of J3 and J4 axis with referring to the
Maintenance and inspection procedures
5-93
cover", and remove the No.2 arm cover U.
<1>Tension adjustment screw
Loosen the nut and screw
<3> J3 axis motor
remove
*The RH-12FH/20FH series is also equivalent although the figure is RH-6FH.
belt".
*The RH-12FH/20FH series is also equivalent
although the figure is RH-6FH.
<2> J3 axis motor fixing screw
remove
<6> Timing pulley B
<4> Timing belt
<2> J3 axis motor fixing screw
Remove
<4> Timing belt
Remove from the timing pulley A (motor
side <5>) and B (shaft side <6>).
Page 92, "(4) RH-6FH/12FH/20FH series: Inspecting/
Page 110, "5.6 Resetting the origin"
(Ball screw lower part)
<6> Timing pulley B
(Ball screw lower part)
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- Rh-3Fh/6Fh Series
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