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5 Maintenance and Inspection
(10) RV-4FR/7FR series: Inspection and replacement of J3-axis timing belt
The reference figure at inspection and replacement of the timing belt is shown in
<2> Timing belt
<3>Tension adjustment screw
With the fixing nut
<1> Motor plate installation screws
Fig.5-19 ： Inspection and replacement of J3 axis timing belt (RV-4FR/7FR series)
■ Inspecting the J3 axis timing belt
1) Refer to
Page 100, "5.3.2 Installing/removing the
2) Visually confirm that the symptoms indicated in
occurred with the timing belt <2>.
3) Refer to
Page 107, "(2) Timing belt tension
4) Install the No. 1 arm cover L securely as before and finish inspection.
■ Replacing the J3 axis timing belt (RV-4FR series)
CAUTION
CAUTION
1) Refer to
Page 100, "5.3.2 Installing/removing the
cover U.
2) Remove the heat conduction sheet A stuck on the J3 axis motor (see
dust, etc. on the adhesive side.
3) Make sure that the pulleys do not move while replacing the belt. If the timing pulley A <4> and B <5> position
relation deviates, the position could deviate.
Be careful not to shift the heat conduction sheet B (see
4) Make marks on the timing belt <2> and timing pulleys <4> and <5> with a felt-tip pen as shown in
that the engagement of the timing belt <2> and timing pulleys <4> and <5> does not deviate.
5) Lightly loosen the two motor plate installation screws <1>. (Do not loosen too much.)
Maintenance and inspection procedures
5-126
measurement", and confirm the belt tension.
If the timing belt of the J3 axis is removed, the forearm will drop by the self-weight.
And, if the positional relation between the timing pulley A <4> and B <5> deviated, it
will become the cause of the position deviation. For the safety before replacing the
timing belts, hit the J3 axis against mechanical stopper with releasing brake.
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.
<5> Timing pulley B
cover", and remove the No. 1 arm cover L.
Page 106, "(1) Timing belt replacement period"
cover", and remove the No. 1 arm cover L and No.1 arm
Fig.
Fig.
5-20).
Fig.
5-19.
(joint side)
Mark
<4> Timing pulley A
(motor side)
have not
5-20). Be careful not to get any
Fig. 5-19
so
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