On Wed, 26 Jul 2006, David C Robie wrote:
Armatures can short by commutator bars shorting together, mechanical damage. Seen quite a few.
Dave,What are the symptoms when that happens? I'd assume that if that happens, the motor wouldn't spin at all - although I guess it would depend on how much of the armature was shorted (i.e. if there's a short across the entire thing vs. partway through the windings).
Thanks, Mike