Timing Belt Tension - Mitsubishi RH-3SQHR3515 Instruction Manual

(6) Timing belt tension

Pressing force
Axis
J1 340-5GT-20
J2 363-3GT-12
J3 297-3GT-9
J4 (Motor side) 345-3GT-6
J4 (Shaft side) 312-3GT-12
The preset value and adjustment value in the sound wave type belt tension gauge
Axis
J1 340-5GT-20
J2 363-3GT-12
J3 297-3GT-9
J4 (Motor side) 345-3GT-6
J4 (Shaft side) 312-3GT-12
Fig.5-8 ： 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 lose. 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.
Belt type Sepang ： s mm
84
103
77
69
82
Belt type
M （g/m)
4.0
2.5
2.5
2.5
2.5
F
Slack ： d mm
1.3
1.6
1.2
1.1
1.3
Preset value
W （mm/R)
20
12
9.0
6.0
12
Fig. 5-8.
Maintenance and inspection procedures 5-73
5Maintenance and Inspection
ｆ ： Pressing force
ｓ ： Span
ｄ ： Slack
T ： Tension
Pressing force ： f (N)
10
4
3
2
4
Standard tension
S(mm)
84 123 ～ 151
103
77
69
82
T(N)
53 ～ 65
40 ～ 48
26 ～ 32
53 ～ 65