5Maintenance and Inspection
Maintenance and inspection procedures 5-66
■ Replacing the J4 axis timing belt
1)
shows the methods for inspecting, adjusting and replacing the timing belt.
2) Turn off the controller power.
3) To reduce dislocation, try to keep the relative positions of the timing pulleys (5), (6), (8) and (9) as much as
possible.
4) Loosen the three idler installation screws (3) and the two J4 axis motor installation screws (1) to remove
the timing belts (7) and (10). If the hand prevents the belts from being removed, remove the hand when
changing the belts.
5) Perform tension adjustment according to steps 3) to 6) in
" ■ Adjusting the J4 axis timing belt"
and
"(4)Timing belt tension" on page 67
. For more accurate tension adjustment, tighten the idler (4) with the
idler installation screws (3) as shown in
, while pulling the RH-6SQH series with a force of 135 N and
the RH-12SQH/18SQH series with a force of 115 N using a push-pull gauge. As shown in
, it is
recommended to tighten the J4 axis motor installation screws (1) while pushing the J4 axis motor (2) with a
force of 65 N for the RH-6SQH series and 45 N for the RH-12SQH/18SQH series using a push-pull gauge.
6) The position could deviate after the belt is replaced. Confirm that the position has not deviated.
Fig.5-7 ： J4 axis timing belt tension (1)
Fig.5-8 ： J4 axis timing belt tension (2)
Remove the bracket attached
vertically on the shaft fastening area.
