Re: Electricity Merit Badge Problems

Michael Kauffmann wrote:

>An electrical engineer serving as a counselor for electricity
>merit badge says the motor diagramed in the merit badge book
>does not work. He's taken this to two other engineers at the
>utility he works for but no one can figure out the problem.
>Has anyone else run into this problem?

Well, the motor is a classic 2 pole commutated DC motor. Maybe the
utility engineers forgot how to deal with motors with commutators
<grin>. At any rate, adjustment of the commutator is the hardest part,
because it is draw to use a set of loops of the wire and those are
harder to make than a cut bit of can wrapped on a fatter shaft (such as
a bit of dowel or cork). The brushes are easier to adjust when the
commutator is larger and smoother. But in the end, it does work.

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