5-68
Maintenance and inspection procedures
5Maintenance and Inspection
(2) Inspection and maintenance of J1 axis timing belt
The reference figure at inspection and adjustment of the timing belt is shown in Fig. 5-4
.
Fig.5-4 ： Inspection, maintenance and cleaning of J1 axis timing belt
■ Inspecting the J1 axis timing belt
1) Confirm that the robot controller power is OFF.
2)
Refer to Page 65, "5.3.2 Installing/removing the cover"
, and remove the base cover B (R) and (L).
3) Visually confirm that the symptoms indicated in
"(1)Timing belt replacement period"
have not occurred with
the timing belt.
4) Check the belt tension as shown in
. Lightly press the center of the belt <A>, and
confirm that the value of belt slack is in following.
RH-3SQHR3515 : Force to press the belt: apprpx.10N ･ m, Flexure: approx.1.3mm
■ Adjusting the J1 axis timing belt
1) Carry out steps
indicated in
" ■ Inspecting the J1 axis timing belt"
above.
2) Lightly loosen the two idler installation bolts <1>. (Do not loosen too much.)
3) The nut which is fixing tension adjustment screw <3> is loosened, turn tension adjustment screw <3>, and
adjust the tension of timing belt <2>. When the screw is turned to the right, the belt will be stretched, and
when turned to the left, will loosen.
Lightly press the center of the belt <A>, and confirm that the value of belt slack is in following.
RH-3SQHR3515 : Force to press the belt: apprpx.10N ･ m, Flexure: approx.1.3mm
If the belt is loosened too much when adjusting the tension causing it to come off the timing pulleys <4> and
<5>, or if the belt and pulley teeth engagement is deviated, the machine system's origin will deviate
4) After adjustment fastens the fixing nut of tension adjustment screw <3>, and certainly fixes tension
adjustment screw <3>. Moreover, also fasten idler fixing screw <1> certainly. (two pc.) Improper tightening can
cause the belt to loosen with vibration.
Note) The figure shows the timing belt structure section in the base portion.
Remove and confirm both base cover B (L) and (R).
ベース カバー B(L) 側
Idler
<1> Idler fixing screw
(two places)
<3>Tension adjustment screw
With the fixing nut
<2> Timing belt
<4> Timing pulley
Base cover B (R) side
Base cover B (L) side
<5> Timing pulley
<A>
Upper face in base
Inside of the base
