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(3) Inspection and maintenance of J2 axis timing belt
The reference figure at inspection and adjustment of the timing belt is shown in
<4> Timing pulley
Upper face of No.1 arm
<1> Idler fixing screw
(two places)
<3>Tension adjustment screw
With the fixing nut
Fig.5-5 ： Inspection, maintenance and cleaning of J2 axis timing belt
■ Inspecting the J2 axis timing belt
1) Confirm that the robot controller power is OFF.
2) Refer to
Page 65, "5.3.2 Installing/removing the
3) Visually confirm that the symptoms indicated in
the timing belt <2>.
4) Check the belt tension as shown in
confirm that the value of belt slack is in following.
RH-3SQHR3515 : Force to press the belt: apprpx.4N ･ m, Flexure: approx.1.6mm
■ Adjusting the J2 axis timing belt
1) Carry out steps
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.4N ･ m, Flexure: approx.1.6mm
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.
Idler
No.1 arm cover B side
Note) The figure shows the timing belt structure section in the No.1 arm portion.
Remove and confirm both No.1 arm cover B.
"Fig.5-8 ： Belt tension"
"1)"
and
"2)"
indicated in
<5> Timing pulley
Inside of the No.1 arm
<A>
<2> Timing belt
cover", and remove the No.1 arm cover B.
"(1)Timing belt replacement period"
. Lightly press the center of the belt <A>, and
" ■ Inspecting the J2 axis timing belt"
Maintenance and inspection procedures 5-69
5Maintenance and Inspection
Fig.
5-5.
have not occurred with
above.
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