Checking Mica (Undercut)
1.
Check to see the mica undercut.
2.
If it has high mica, rectify with a saw blade. As the edge of the segment will
be
rough,
chamfer it.
Mica depth
Model
Reference value Allowable limit
01102-B
0.5
to
0.8
mm
01302-B
.
0.0197
to
0.315
in. 0.2 mm
01402-B
0.0079
in.
V1502-B
0.5
to
0.9
mm
V1702-B
0.0197
to 0.0354 in.
V1902-B
(al Bad
(bl
Good
~~
Good
Grounding of Armature Coil
1.
Check conduction across the commutator and the armature shaft.
2.
If conducting, replace.
Reference value Should not be conducted.
.
141
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