Bob Minchin writes:

I'd say that is highly unlikely in a washing machine.
Who/what would measure the speed?


That is exactly how a washing machine motor is speed controlled. The tacho
generator tells the electronic module what speed the motor is running at. It is
the only way to get a simple universl motor to run at washing speed (50 ish rpm)
and 1100 or more rpm for spinning.


Well, I've never worked on a Lucas washing machine, but I've fixed my share
of Maytag's, FSP's [various nameplates] etc.

I have never seen a speed control of any form. The FSP's use a transmission
that oscillated the agitator while the drum rotated, and then changed gears
to spin the water out while the pump drains the drum.

The resulting speed is load-dependent. When it's full of water it's
starts out slower than when empty..





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