Checking Armature Flexure
1.
Measure the amount of flexure; if the measurement exceeds the reference value, replace.
Carefully check to see if the core is scratch.
Reference value
Checking Armature Coil Short-Circuited
0.1
mm
0.0039 in.
1.
Set the armature
on
the armature tester. Rotate the armature while touching it with steel piece.
2.
If the steel piece starts to vibrate or to be attracted somewhere on the armature, this suggests
that the coil contains a layer short at the point.
3.
If faulty, replace.
Reference value
The armature should not be short-circuited.
142
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