Mitsubishi RV-2F Series Instruction Manual Download

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5-57

Maintenance and inspection procedures

5 Maintenance and Inspection

(6) Inspection, maintenance and replacement of J5 axis timing belt and brake timing belt

The J5 axis has the timing belt rotating the J5 axis and the brake timing belt conveying the brake. The

inspection, maintenance and replacement method of each belt is shown below.

A)Inspection, maintenance and replacement of J5-axis timing belt

The reference figure at inspection, adjustment, and replacement of the timing belt is shown in

Fig. 5-9

Fig.5-9 ： Inspection, maintenance and replacement of J5 axis timing belt

■ Inspecting the J5 axis timing belt

1) Confirm that the robot controller power is OFF.
2) Refer to

Page 49, "5.3.2 Installing/removing the cover"

, and remove the No. 2 arm cover R.

3) Visually confirm that the symptoms indicated in

"(1)Timing belt replacement period"

have not occurred with

the timing belt.

4) Confirm that the belt tension is adjusted to slacken approx. 2.0mm when the center of the belt is lightly

pressed with a finger (approx. 1.3N) as shown in

"Fig.5-13 ： Belt tension"

■ Adjusting the J5 axis timing belt

1) Carry out steps 1) and 2) indicated in

" ■ Inspecting the J5 axis timing belt"

above.

2) Lightly loosen the three

motor plate fixing screws

<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.
Confirm that the belt tension is adjusted to slacken approx. 2.0mm when the center of the belt is lightly
pressed with a finger (approx. 1.3N).
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

motor plate fixing screw

<1> certainly. (three pc.) Improper

tightening can cause the belt to loosen with vibration.

■ Replacing the J5 axis timing belt

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

Fig. 5-9

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>. (Do not loosen too much.)

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

"(8)Timing belt tension"

to adjust the tension.

J5 axis

<1>Motor plate fixing screw

<2> Timing belt

<5> Timing pulley

(joint side)

<4> Timing pulley

(motor side)

Mark