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RE: RE: Re: AC Motor Speed Control

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Posted by Stephen Campbell on March 7, 2000 09:58:13 UTC

Hi Cly: i think now,after reading all the responses i got on ac motor control that the best way to go would be a system of pulleys, most ac motors run at around 1700 rpm,some at 1140,i have been thinking of using a 10:1 gear reducer,coupled to the motor shaft, that way i could use smaller diameter pulleys,which means less cost and smaller size machine,i have a basic design for a grinder/polisher,using n=D(N)/d,where n=rpm,D=driver pulley,N=drive motor rpm,d=driven pulley diameter. i came to the conclusion that when using a 1725rpm washing machine motor you need two 14" pulleys,a 1" and 3" pulley on the motor and first 14" pulley,that way by chang ing belts from one pulley to another you can get 10rpm and 92rpm. stevec.

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