Timing Belt Tension - Mitsubishi RV-2F Series Instruction Manual

5 Maintenance and Inspection

(8) Timing belt tension

■ The preset value and adjustment value in the sound wave type belt tension gauge
Preset value
Axis
wait
J1 2.5
J2 2.5
J3 2.5
J4 2.5
J5 2.5
J6 2.5
The sound wave type belt tension gauge of the standard
Maker:Gates Unitta Asia Company, Type:U-505
■ Belt specification
Axis Belt type
J1 210-3GT-6
J2 324-3GT-6
J3 303-3GT-6
J4 186-3GT-4
J5 336-3GT-4
J5(brake) 174-3GT-4
J6 345-3GT-4
J5(brake) 174-3GT-4
■ Adjustment
Axis Tension ： T (N) Slack ： d (mm) Pressing force ： f (N)
J1 29
J2 29
J3 29
J4 20
J5 20
J6 20
<Note>
The tension of brake timing belt of the J5 and the J6 axis is automatically adjusted by the work of spring
installed in the motor plate.
Fig.5-13 ： Belt tension
The timing belt can satisfactorily convey the drive and keep a durable force only when it has an adequate tension.
The belt tension should not be too tight or too loose. Instead, it should be adjusted to a degree that elasticity is
felt when the belt is pressed with the thumb. If the belt tension is too weak, the belt loosening side will vibrate. On
the other hand, if the belt tension is too strong, a sharp sound will be heard and the belt tension side will vibrate.
The detailed adjustment (tension) is shown in
Check and adjust with the belt pressing force f and the slack amount d between span s.
Maintenance and inspection procedures
5-63
T
T
T
T
Tension: Used belt (N)
width span Minimum
6 61 26
6 88 26
6 103 26
4 52 18
4 131 18
4 131 18
Span
： s (mm)
61
88
103
52
131
42
131
42
1.0 1.9
1.4 1.9
1.6 1.9
0.8 1.3
2.0 1.3
2.0 1.3
f ： Pressing force
s ： Span
d ： Slack
T ： Tension
Tension: New belt (N)
Maximum Minimum
32 37
32 37
32 37
22 26
22 26
22 26
■ Inspection
Axis Tension
： T (N)
J1 14.7 ～ 43
J2 14.7 ～ 43
J3 14.7 ～ 43
J4 10 ～ 30
J5 10 ～ 30
J6 10 ～ 30
■ Exchange （New article installation）
Axis Tension ： T (N)
J1 40
J2 40
J3 40
J4 28
J5 28
J6 28
Fig. 5-13.
Force of pulling the
motor plate
Maximum
43 31(N) ～ 39(N)
43 Note 1) The force when pulling the
motor plate for belt adjustment of
43
the J1 axis is shown.
30
30
30
Slack Pressing force
： d (mm)
1.0 1.0 ～ 2.9
1.4 1.0 ～ 2.9
1.6 1.0 ～ 2.9
0.8 0.7 ～ 2
2.0 0.7 ～ 2
2.0 0.7 ～ 2
Slack ： d (mm) Pressing force ： f (N)
1.0
1.4
1.6
0.8
2.0
2.0
note 1)
： f (N)
2.7
2.7
2.7
1.9
1.9
1.9