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The motor seems to be loosing power when ripping stock!

I've had this table saw for 5 years now it's a great saw. I'ts a Delta 5 h/p left tilt. I bought it just before the x-5's came out. Anyway I'm a wood worker not a mechanic. With that being said the motor for some reason almost comes to a halt while cutting. This has never been a problem before just barely started. I tightened down the motor to take any slack out of the belts but they seemed pretty snug in the first place. There is no weird sound when I turn the saw on however it takes a half second to build it's max speed and then it's fine until I go to rip material then it seems to bind down. It will still cut I just have to go slow or else it slows way down, again this is a 5 h/p I've had no problems before. Anyway I'm in the middle of a huge custom project I hope you guys can help me .
Thanks for your time
Jesse S. Neville
''Interior Structures''

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It's an AC induction motor, right?  Is there a "run" capacitor?  Have you checked it?
(With the saw disconnected from AC mains, short out the capacitor to ensure that there is no residual charge. Disconnect one of the leads to the capacitor, effectively taking it out of the circuit.  With your ohmmeter on someting like a ' X100" scale, connect the leads to the capacitor terminals; Does the needle fly to "0" then slowly climb toward something like 2-5-10 megohms, or thereabouts?  Now remove the leads, short the capacitor and reverse the ohmmeter leads when you reconnect the ohmmeter.  'Should fly to "0" and climb as with the previous test.

If there isn't a significant phase difference between voltage and current, the motor will lack power; that's what the "run" capacitor is for.  They can go bad.

Hope you're not.... er...  uh....  "In-capacitated" .


Posted on Apr 21, 2009

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How are you plugging the saw in? It sounds like the saw is not getting enough voltage. Be sure to have it on a 20A circuit without any extension cords...

Posted on Dec 29, 2008


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