Tony,
What you say makes my day.. the additional winding, which I seem to recall was
of thinner wire and wound over the standard field coil about 50 times (ie; not
very much I thought..) - is not for strengthening the magnetic field but for
weakening it to give a slower speed! - I assumed it was to give a faster speed
but now what you say makes a whole lot more sense - THANKS!
Carl
'63TR4 since '74
Carl,
I helped Dan write his section on the 2-speed wipers in his electrical
manual. I had a TR4A 2-speed motor out on my desk at the time. I did not
dismantle it. I found that the "low" speed was obtained by grounding BOTH of
the switched wires. It made no sense to me. A few hypotheses were made about
why this may be true, but that seems to be the way it works. I have been
tempted over the tears to pursue this further, but I never bothered. To me
they are literally a black box, but I woud be interested to see how they
really work! Keep me in the loop too!
-Tony
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