Scara Mechanical Unit Manual
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40
5.4.2.
Failure mode of timing belt
Periodical maintenance of the timing belt should be performed.
Abnormal item
Appearance
Abnormal wear on
the gear tooth
(initial)
The tooth cloth fiber fluffs, the rubber peels down,
the color tends to white, the vein of the cloth tends to
indistinct.
Check the appearance. When abnormal situation occurs, replace the abnormal part.
Abnormal item
Appearance
Abnormal wear on
the gear tooth
Wear of the tooth cloth. Exposure of the rubber. (width
of tooth profile reduces)
Crack on the gear
dedendum
Crack
Dedendum fall off
Exposure of core wire
Abnormal wear
Edge tends to round, abnormal wear (exposure of core
wire)
Note: it is normal when the side face section shows an
knife-cutting shape.
Crack on the side
face of the timing
belt
Replace the timing belt when belt failure occurs. After replacing the timing belt, re-tight the belt
tension and re-calibrate the zero position.
