Maintenance and inspection procedures 5-91
■ Replacing the J5 axis timing belt
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.
1) Carry out steps 1) and 2) indicated in
" ■ Inspecting the J5 axis timing belt"
above.
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
(RV-13F/20F), so that the engagement of the timing belt <2> and
timing pulleys <4> and <5> does not deviate.
4) Lightly loosen the three
motor plate fixing screws
<1> (RV-4F/7F series: two pc. RV-13F series: three pc.)
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"
and
to adjust the tension.
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 origin"
, and reset the origin position.
CAUTION
