Quote:
Originally Posted by oldtamiyaphile
If you pull apart a DC motor, you'll find the negative brush is often worn about twice as much as the positive brush, due to the flow of electrons. As such I think most wear occurs while electrons are flowing.
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Yep, it's the same process as happened on
ignition breaker points, where "pitting" was caused by current-flow actually causing metal-transfer ("pitting") which was offset by adjusting the value of the condenser (capacitor):
"...a MINUS (pit) on the MINUS (neg.terminal) is a MINUS (too little capacitance)..."
