5-106
Maintenance and inspection procedures
5 Maintenance and Inspection
(1) Timing belt replacement period
The timing belt life is greatly affected by the robot working conditions, so a set time cannot be given. However, if
the following symptoms occur, replace the belt.
1) The belt tension value becomes less than the guideline value.
2) A position mismatch or gear teeth skipping occurs.
3) The belt is damaged as shown in Table 5-7.
Table 5-7 ： Typical damage conditions of the timing belt
Due to the manufacturing of the timing belt, initial wear will occur. Wear chips may
accumulate in the cover after approx. 300 hr of operating the robot, but this is not a
fault.
When the belt is replaced, the machine system origin may deviate. After the replace
-
ment, ensure to reset the origin.
Damage condition Appearance Cause
Gear tooth crack Overload
Backside crack Deterioration of rubber due heat to or
ozone
Worn teeth Overload
Excessive or insufficient tension
Tooth bottom abrasion and exposure of
cores
Excessive tension
The following is not a belt damage.
Fibers coming out of the side face of the
belt
Manufacturing related factor.
This is not a belt damage.
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