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

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Forum topic by shawneegrove posted 11-09-2009 07:46 AM 1336 views 0 times favorited 8 replies Add to Favorites Watch
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shawneegrove

4 posts in 1817 days


11-09-2009 07:46 AM

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.


8 replies so far

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TopamaxSurvivor

14905 posts in 2372 days


#1 posted 11-09-2009 09:08 AM

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.

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

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TopamaxSurvivor

14905 posts in 2372 days


#2 posted 11-09-2009 09:09 AM

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

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

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TopamaxSurvivor

14905 posts in 2372 days


#3 posted 11-09-2009 09:14 AM

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.

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

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shawneegrove

4 posts in 1817 days


#4 posted 11-10-2009 02:15 AM

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

14905 posts in 2372 days


#5 posted 11-10-2009 02:31 AM

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

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

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Karson

34891 posts in 3096 days


#6 posted 11-10-2009 03:12 AM

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

-- I've been blessed with a father who liked to tinker in wood, and a wife who lets me tinker in wood. Southern Delaware karson_morrison@bigfoot.com †

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a1Jim

112363 posts in 2273 days


#7 posted 11-10-2009 03:28 AM

Good news glad it worked out.

-- http://artisticwoodstudio.com Custom furniture

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Rick Dennington

3480 posts in 1890 days


#8 posted 11-10-2009 08:24 AM

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

-- " I started with nothing, and I've still got most of it left".......

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