Re: Electricity Merit Badge Problems
John Durbetaki (JohnDurbetaki@WORLDNET.ATT.NET)
Wed, 5 Aug 1998 21:51:30 -0700
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.
Terry Howerton Sakima Group, Inc. SCOUTER Magazine Kansas City