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Maintenance and inspection procedures
(4) RH-3FRH 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-3FRH 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) 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 101, "5.3.2 Installing/removing the cover"
, and remove the No.2 arm cover U.
3) Loosen the nut of tension adjustment screw <1>, and loosen the tension adjustment screw <1>.
4) Remove two fixing screws <2>, remove the J3 axis motor <3>, remove the timing belt <4> from the timing pulley
A <5>.
CAUTION
<5> Timing pulley A
<6> Timing pulley B
*Move the J3 axis to the
position lowered about 30mm
from the upper limit
previously.
<1>Tension adjustment screw
Loosen the nut and screw
<4> Timing belt
<2> J3 axis motor fixing screw
remove
<3> J3 axis motor
<2> J3 axis motor fixing screw
remove
<4> Timing belt
Remove from the timing pulley A <5>.
<3> J3 axis motor
remove
<2> J3 axis motor fixing screw
remove
<2> J3 axis motor fixing screw
remove
<5> Timing pulley A
