My grandfather recently gave me a table saw that he bought about 25 years ago, but never used. I put it together, but can’t get the motor to run. There’s a diagram on the motor housing that gives different wiring options for 110 and 220 power supplies, and I think I’ve got it wired for 110, but when I turn the switch on, the motor just hums for about 4 seconds, then trips the breaker. I can easily turn the belt by hand, so I don’t think the motor’s seized up, but I can’t figure out why it’s not running. Anyone have any ideas?
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There's really no simple answer. I suggest you get the motor out, and take it to a motor shop. They will have the equipment to quickly determine just what's going on.
Could be the start capacitor is bad. Did you go to the web site and download the schematic?
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I have an old tablesaw that's done that more than once.
The solution has been to take the back off the motor and clean up the points. They have something to do with the capacitor start, I think.
All it took was some time and emery paper, and it runs for another couple of years before I have to do it again.
the OP says it's a virgin TS...
WTB it's wired fot 220V ot the start cap is toast..
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blow it out with compressed air, manually move the belts.....i dont think its the wiring
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As you flip the power on, give the motor a spin with your hand. (carefully!)
If it starts up then it's either the start capacitor or the centrifugal switch.
If it doesn't start after 2-3 valiant tries at the above, probably you have the wires crossed -- the two coils fighting each other. You need to swap one pair of wires. (But double-check the color codes against the diagram first.)