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That is truly amazing. How do you control the rotational speed on the sewing machine motor?
The Singer ac motor speed was manually controlled (or rather set) by voltage , with the Berkeley flea market PS shown in the video. Besides having regulated DC output, it also got variable AC output within 0-120V very much like a Variac.
That is truly amazing. How do you control the rotational speed on the sewing machine motor?
The Singer ac motor speed was manually controlled (or rather set) by voltage , with the Berkeley flea market PS shown in the video. Besides having regulated DC output, it also got variable AC output within 0-120V very much like a Variac.