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Forum topic by chalky2 posted 07-25-2012 10:38 AM 687 views 0 times favorited 5 replies Add to Favorites Watch
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chalky2

7 posts in 1229 days


07-25-2012 10:38 AM

I have a Grizzly G0690 tablesaw with a 3 hp Leeson motor. The motor runs with very little power for about 10-15 sec and then stops. Had the contacts cleaned and both bearings replaced put it backon the saw and same reaction. . Any suggestions?


5 replies so far

View jmos's profile

jmos

681 posts in 1035 days


#1 posted 07-25-2012 12:11 PM

That’s odd. Is the power supply OK; getting full voltage to the motor? All the electrical connections well made and tight?

If you had the contacts checked and bearings replaced, can I assume you took it to a motor shop? Did they check the windings while they had it?

edit – Does the motor do this if the belt is not in place? Could the arbor not be turning freely? When you say it stops, does the breaker or the overload trip, or does it simply stop? Sorry, more questions than answers, but it might help to track down the problem.

-- John

View knotscott's profile

knotscott

5482 posts in 2041 days


#2 posted 07-25-2012 01:14 PM

Check the capacitors inside the external cans on the motor. Also, check your 220v line.

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

View MedicKen's profile

MedicKen

1599 posts in 2128 days


#3 posted 07-25-2012 01:20 PM

Capacitor. I just fixed a Rikon with a 2hp Leeson that had the EXACT same symptoms.

-- My job is to give my kids things to discuss with their therapist....medic20447@gmail.com

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BlankMan

1487 posts in 2019 days


#4 posted 07-25-2012 02:34 PM

Sound like it’s overheating and the thermal protector is opening. If it’s got two capacitors, capacitive start./capacitive run it could very well be the run capacitor, I would start there. If it’s only got one capacitor it could be that the centrifugal switch isn’t opening when up to speed. You mentioned the contacts were cleaned but is it working? Turn it on for a bit then turn it off and listen, as it comes to a stop you should hear a click, that be the switch closing. If you don’t here that it’s possible the switch is never opening and the start winding is staying energized which it is not designed to do.

-- -Curt, Milwaukee, WI

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chalky2

7 posts in 1229 days


#5 posted 07-26-2012 12:48 AM

Thanks to all that responded. It seems the general thought is the cause may lay in the capacitors. My 220 is fine since I am able to run my jointer off of that line. Thanks again. Chalky

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