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Reply by EEngineer

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Posted on humming noise coming from my delta unisaw when the power is off

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EEngineer

893 posts in 2267 days


#1 posted 11-14-2012 05:54 PM

The magnetic switch on these saws has a 24V transformer. It drives the main contactor that supplies power to the motor. The humming you hear is most likely the core laminations vibrating at 60 Hz.

-- "Find out what you cannot do and then go do it!"


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