Rh-3Fh Series: Replacing The J3 Axis Timing Belt - Mitsubishi Electric RH-3FH Series Instruction Manual

5 Maintenance and Inspection

(3) RH-3FH series: Replacing the J3 axis timing belt

The procedure for replacing the J3 axis timing belt on the RH-3FH 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 81 "Fig. 5-4: Installing/removing the
3) Loosen the nut of tension adjustment screw <1>, and loosen the tension adjustment screw <1>.
<2> J3 axis motor fixing screw
remove
<1>Tension adjustment screw
Loosen the nut and screw
4) Remove two fixing screws <2>, remove the J3 axis motor <3>, remove the timing belt <4> from the timing pulley
A <5>.
<2> J3 axis motor fixing screw
remove
<5> Timing pulley A
<4> Timing belt
Remove from the timing pulley A <5>.
Maintenance and inspection procedures
5-89
<5> Timing pulley A
cover", and remove the No.2 arm cover U.
<3> J3 axis motor
<2> J3 axis motor fixing screw
remove
<4> Timing belt
<3> J3 axis motor
remove
<2> J3 axis motor fixing screw
remove
*Move the J3 axis to the
position lowered about 30mm
from the upper limit
previously.
<6> Timing pulley B