Mitsubishi Electric RV-4FM-SE Series Instruction Manual page 101

■ Replacing the J5 axis timing belt
CAUTION
1) Carry out steps 1) and 2) indicated in
2) Make sure that the pulleys do not move while replacing the belt. If the timing pulley <4> and <5> position
relation deviates, the position could deviate.
3) Make marks on the timing belt <2> and timing pulleys <4> and <5> with a felt-tip pen as shown in
(RV-4F/7F series, RV-7FLL) or
timing pulleys <4> and <5> does not deviate.
4) Lightly loosen the three
5) Loosen the nut fixing tension adjustment screw <3>. Loosen the tension adjustment screw <3>, and remove
the old belt.
6) Copy the marks onto the new timing belt. Make sure that both belts are tense when making the marks.
7) Align the new timing belt with the marks on the timing pulleys <4> and <5>, and install.
8) Refer to " ■ Adjusting the J5 axis timing belt"
9) The position could deviate after the belt is replaced. Confirm that the position has not deviated. If deviated,
refer to Page 104, "5.6 Resetting the
If the timing belt of the J5 axis is removed, the forearm will drop by the self-weight.
(faces in the downward) And, if the positional relation between the timing pulley (4)
and (5) deviated, it will become the cause of the position deviation. For the safety
before replacing the timing belt, move the J3 axis so that it may face in the downward
by jog operation.
" ■ Inspecting the J5 axis timing belt"
Fig. 5-11 (RV-13F/20F), so that the engagement of the timing belt <2> and
motor plate fixing screws
origin", and reset the origin position.
<1> (RV-4F/7F series: two pc. RV-13F series: three pc.)
and "(8)Timing belt tension"
Maintenance and inspection procedures 5-91
5 Maintenance and Inspection
above.
Fig. 5-10
to adjust the tension.