Epson C8-B - Adjusting the Timing Belt Tension; Belt Tension Values; Items to be Prepared

C8-B/C12-B Service Manual Adjustment Disclosure Scope: Maintenance Trained Personnel Only
(C) Seiko Epson Corporation 3-1 Rev.1
3.1 Adjusting the Timing Belt Tension
The Manipulator uses six types of Timing Belts.
When removing or replacing parts related to the belt, be sure to adjust the tension of the Timing Belt.
CAUTION
⚫ If the belt tension falls below the lower limit, the belt may jump off the teeth and cause positioning failure.
If the belt tension exceeds the upper limit, it may cause oscillation (abnormal noise) and reduce the service life of parts.
⚫ When the belt is replaced with a new one, the belt may stretch and lose tension at first.
Be sure to check the belt tension again after operating the robot for a few days.
3.1.1 Items to be prepared
• Force gauge
• Sonic Belt Tension Meter
Recommended: U-508 (Gates Unitta)
• Suitable cord (Length about 800 mm)
• Belt Tensioner JIG (Maintenance Parts Code: 1674582)
3.1.2 Belt Tension Values
Tension Meter setting values
J1
J2
J3
J4
J5
J6
Unit mass
(g/mm width x m span)
4.0
4.0
2.5
2.5
2.5
2.5
Belt width (mm)
20
14
10
6
6
6
Belt span (mm)
160
146
168
61
117
122
Tension standard values
J1
J2
J3
J4
J5
J6
Belt tension
(Minimum to maximum) (N)
89 to 149
58 to 95
25 to 85
15 to 30
15 to 30
15 to 30