5-117
Maintenance and inspection procedures
(6) RH-6FRH/12FRH/20FRH series: Replacing the J3 axis timing belt
It is possible for the customer to replace the timing belt, but precise adjustment is
needed to prevent malfunction of the relevant parts. To ask for replacement of the
timing belt, contact the dealer.
The procedure for replacing the J3 axis timing belt of the RH-6FRH/12FRH/20FRH 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 101, "5.3.2 Installing/removing the cover"
, and remove the No.2 arm cover U.
2) Loosen the nut of tension adjustment screw <1>, and loosen the tension adjustment screw <1>.
3) Remove two fixing screws <2>, and remove the J3 axis motor <3>.
4) Remove the timing belt <4> from the timing pulley A <5> and B <6>.
CAUTION
<3> J3 axis motor
remove
<2> J3 axis motor fixing screw
remove
<2> J3 axis motor
fixing screw
remove
<6> Timing pulley B
(Ball screw lower part)
<5> Timing pulley A
<1>Tension adjustment screw
Loosen the nut and screw
<4> Timing belt
*The RH-12FRH/20FRH series is also
equivalent although the figure is RH-6FRH.
<4> Timing belt
Remove from the timing pulley A (motor
side <5>) and B (shaft side <6>).
Remove
<3> J3 axis motor
remove
<2> J3 axis motor fixing screw
Remove
<2> J3 axis motor fixing screw
<5> Timing pulley A
<6> Timing pulley B
(Ball screw lower part)
*The RH-12FRH/20FRH series is also equivalent although the figure is RH-6FRH.
