I just got a rockwell 10" 3hp, 220v unisaw from a family member. It didn't start. After testing several of the components. I then used jumper between the power wire and the stop wire on the start/off switch and it ran. I took the switch apart and cleaned the contacts, reinstalled the swithch and it functioned like it should; but now with power to the saw and in the stop position there is humming sound coming from the lvc swithch box. Got any ideas, recommendations.
old macdonald
Does the switch work aside from the hum?
you may have a stuck contact on one pole of your switch, so that the motor is partially energized when 'off'. If it is a capacitor start motor, the centrifugal switch may be bad, but then the motor probably wouldn't start everytime that you pushed the on button, you might have to give it a push.
you may have a stuck contact on one pole of your switch, so that the motor is partially energized when 'off'. If it is a capacitor start motor, the centrifugal switch may be bad, but then the motor probably wouldn't start everytime that you pushed the on button, you might have to give it a push.
Welcome to the forum, Art.
Electrical problems are outside my realm, but you will get the right advice from the forum.
Electrical problems are outside my realm, but you will get the right advice from the forum.
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