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please help...Grizzly Bandsaw motor not working--21", 5hp

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Forum topic by shawneegrove posted 11 days ago 362 views 0 times favorited 8 replies Add to Favorites Watch
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shawneegrove

4 posts in 11 days


11 days ago

I need some help. After setting up my Grizzly, 21”, 5hp bandsaw recently, and making two cuts, when I started my 3rd cut the saw cut off after 2 seconds. It tripped the internal breaker on the machine, and once I reset it would come back on, but cut off again after 2 seconds. The blade would try to build up speed and then just stop, (machine’s breaker was thrown just like before). Well, Grizzly had me take the motor apart and rub some sandpaper on the contacts….which was no help. So they sent me a new motor and today the exact same thing has happened. i made two cuts and now the internal breaker trips after 2 or 3 seconds of trying to get the blade up to speed. i don’t have the blade too tight. I will call grizzly tomorrow, but does anyone have an idea. It’s plugged in to a new 30 amp 220volt plug but I don’t have a way to test the plug to make sure it’s getting enough power. I guess I can have the electrician come out and check that.

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TopamaxSurvivor

2966 posts in 566 days


11 days ago

You are probably overloading the motor due to low voltage (could be a poor connection), the saw is set up wrong overloading the motor or the motor is running at the wrong speed (too high) overloadiing the motor would be my first three guesses.

-- Debt is nothing more than the 21st Century's form of slavery.

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TopamaxSurvivor

2966 posts in 566 days


11 days ago

BTW, welcome to LJs. Too bad it isn’t under better circumstances :-((

-- Debt is nothing more than the 21st Century's form of slavery.

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TopamaxSurvivor

2966 posts in 566 days


11 days ago

Make sure your electrician checks the voltage with the motor trying to start or running. I might show 220-240 volts no load and still drop too low under load to start or run the motor.

-- Debt is nothing more than the 21st Century's form of slavery.

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shawneegrove

4 posts in 11 days


11 days ago

The electrician came out and adjusted something in the bandsaws wiring box that would not let the internal bandsaw reset/breaker trip so easily, like a screw or dial that is used to determine under what load/electrical stress the machine will cut itself off…..I can’t remember what he called it, but I’m up and running!

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TopamaxSurvivor

2966 posts in 566 days


11 days ago

That was an easy one :-)) Glad you’re up and running. Had to be some sort of overload device or current sensor.

-- Debt is nothing more than the 21st Century's form of slavery.

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Karson

25786 posts in 1291 days


11 days ago

I couild be the spring on the thermal coil for the magnetic switch. It draws too much heat and it pops.

-- What happens in the workshop stays in the workshop. No wait that doesn't sound right. Karson Southern Delaware karson_morrison@bigfoot.com †

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a1Jim

16474 posts in 468 days


11 days ago

Good news glad it worked out.

-- Jim from Heirloom Woodshop Southern Oregon

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Rick Dennington

310 posts in 85 days


10 days ago

What can I say——it’s a Grizzly. ‘nuff said.

-- Remember--- one good turn-- gets most of the blanket!!!!

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