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Helwig Carbon Visual Guide to Commutator Conditions and Problems
Helwig Carbon created a commutator condition guide illustrating the common causes for reduced commutator performance. To view the full guide, click on the image above.
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Commutator Conditions: Problems and Causes
The commutator should have a smooth film and consistent color. The film should be from light to dark brown. A streaky film is often a warning that the commutator might thread. If this is the case, fine copper dust will be found on the brushes and brush rigging. Bar marking, where some bars are lighter…
