Elect prob with Rockwell Unisaw - Router Forums
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post #1 of 3 (permalink) Old 09-10-2013, 12:44 PM Thread Starter
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First Name: art
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Default Elect prob with Rockwell Unisaw

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.
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post #2 of 3 (permalink) Old 09-10-2013, 03:50 PM
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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.

1 John 1:9
Fredericksburg, VA

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post #3 of 3 (permalink) Old 09-10-2013, 05:30 PM
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Welcome to the forum, Art.

Electrical problems are outside my realm, but you will get the right advice from the forum.

Sydney, Australia

I don't mind if other members disagree with my comments.
I don't profess to know everything, and I may learn something new.

"Never attribute to malice that which is adequately explained by stupidity."

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