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Bandsaw motor problem

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Forum topic by Gixxerjoe04 posted 09-17-2016 01:31 AM 537 views 0 times favorited 17 replies Add to Favorites Watch
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Gixxerjoe04

835 posts in 1044 days


09-17-2016 01:31 AM

So i was working on some stuff today, was using my rigid bandsaw to cut some things up. Made a cut then turned the machine off then turned it right back on because I meant to make an extra cut. I think I heard a pop and my motor started making noise. Thought something had gotten stuck on the motor belt or something, checked it all and turned it back on. The noise went from concerning to ear piercing. Sooooo anyone know what’s wrong? Planned on upgrading to a better bandsaw next year, was planning on buying a supermax drum sander next month, looks like that might be put on hold.

Here’s a video of the noise.
https://www.youtube.com/watch?v=naXPwK3Nk7k


17 replies so far

View Pimzedd's profile

Pimzedd

562 posts in 3271 days


#1 posted 09-17-2016 02:00 AM

Does the blade turn when the motor is turned on?

-- Bill - Mesquite, TX --- "Everything with a power cord eventually winds up in the trash.” John Sarge , timber framer and blacksmith instructor at Tillers International school

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Gixxerjoe04

835 posts in 1044 days


#2 posted 09-17-2016 02:02 AM

yea

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MrUnix

4245 posts in 1666 days


#3 posted 09-17-2016 02:04 AM

Doesn’t really sound like the motor, but the video is not all that great. But first, you need to positively identify where it’s coming from. Start by taking the belt off the motor and see if it still does it. If you are positive it’s the motor, then it’s probably time to open it up and see what’s going on. Might be something simple like a broken centrifugal switch Good chance to clean it out (and maybe replace the bearings while you are in there) ;-)

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

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Gixxerjoe04

835 posts in 1044 days


#4 posted 09-17-2016 02:10 AM

It’s def the motor, took the guard that goes around the belt and opened it up around the wheels and checked them, everything seems to be good.

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distrbd

2228 posts in 1914 days


#5 posted 09-17-2016 02:16 AM

I would remove the belt and turn the motor by hand to see if it turns smoothly or does it have a crunch feel, if it does it may have bad bearings,removing and replacing the bearings is not too difficult if you follow the proper procedure.

-- Ken from Ontario, Canada

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MrUnix

4245 posts in 1666 days


#6 posted 09-17-2016 02:17 AM

Well, if you are positive it’s the motor – then it’s probably time to yank it and crack it open. It’s only 4 bolts. Tip: Take a punch or cold chisel and mark where the end bells are in relation to the motor body, so you can put them back on in the exact same position.

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

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realcowtown_eric

565 posts in 1404 days


#7 posted 09-17-2016 03:27 AM

Me from the sounds of it, the first thing I would check is the pulley.shaft mounting.

IF you had a loose pulley screw, and the woodroof key worked itself out, the motor would turn, maybe driving that pulley, but maybe it was the driven pulley that lost the key,

Regardless loss of either key would allow the pulley to rotate on the shaft, and generate a high pitched squeal as the metal rubbed on metal.

The pop you heard may have been the woodroof key making it’s departure.

If you don’t know what it looks like, its a crescent moon shape.

And ya, if you turn it by hand, everything may turn, and if you have spalled metal on the shaft pulley interface, it may provide enuf friction to turn everything without load.

Freak, even by looking at shaft and pulley, if the key is missing you will see the slots misaligned unless you are so unlucky as to have the slots accidently aligned! ((about a 1 in 360 chance of that, but it could still happen)...

Just align the slots, push in the new woodroof key and tighten the allen screw on the puley.

If the pulley turns and the the shaft doesn’t, the key is missing

I wouldn’t pop the motor apart until you check what I just said. .

Motors tend to run without p[problems for a long time. If you have an open motor, in a bandsaw, sometimes the dust can accumulate on the starter points, but that presents as a flakey starting, the starting points are so crudded up with burnt sawdust that they don’t make contact, so all yer motor does is humm and eventually smoke.

My bet is you got a power transmission problem and a 39 cent woodroof key may well be the solution.

We should all have a spare or four in the shop.

Me I wouldn’t go looking for the 300$ solution (new bandsaw) when the 39 cent solution would get me runnung again in minutes.

Don’t ask me how I know this….

Regards…

Eric

Eric

-- Real_cowtown_eric

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dhazelton

2326 posts in 1764 days


#8 posted 09-17-2016 10:24 AM

That didn’t sound like a motor issue to me, sounded like a belt or something jammed between blade and tires. I like what he ^ said and would follow his diagnosis procedure.

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distrbd

2228 posts in 1914 days


#9 posted 09-17-2016 03:06 PM

The key coming off the pulley is a good possibility, It happened to each bandsaw I’ve owned.

-- Ken from Ontario, Canada

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WhyMe

617 posts in 1028 days


#10 posted 09-17-2016 03:30 PM

Failed motor bearing. I just had to replace a bad motor bearing a few weeks ago. Sounded just like that when it went.

View Gixxerjoe04's profile

Gixxerjoe04

835 posts in 1044 days


#11 posted 09-19-2016 01:53 AM

Will need to look up some videos to hopefully help figure out what I’m doing. Had a show this weekend and my wife is due to give birth any day now, so probably won’t have time for awhile I’d say.

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HokieKen

1807 posts in 606 days


#12 posted 09-19-2016 11:41 AM

Nah, your wife doesn’t need your help having that baby, you need to focus on your bandsaw. ;-)

Seriously though, after you’re a proud Papa (congrats!), I’d check pulley key first then follow Brad’s advice on opening the motor housing and checking the switch and bearings. Not sure what saw you have (can’t watch video right now) but even if it’s a catastrophic failure of the motor (and I doubt it is if it’s still driving the saw) I’d be willing to bet you could replace the motor cheaply without chucking the whole saw.

-- Kenny, SW VA, Go Hokies!!!

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realcowtown_eric

565 posts in 1404 days


#13 posted 09-20-2016 02:01 AM

listened to the youtube….my bet is still on the missing key

Eric

-- Real_cowtown_eric

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Gixxerjoe04

835 posts in 1044 days


#14 posted 09-26-2016 06:17 PM

Figured I’d give an update. So, luckily it was what some of you all thought, I little piece of metal that holds the pulley wheel in place popped out and was causing the noise. Found it in a pile of dust luckily, guess the noise was so ear piercing, I thought it just sounded like it was coming from the motor. Just glad it was a simple fix, would have sucked being without a bandsaw for awhile.

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Pimzedd

562 posts in 3271 days


#15 posted 09-26-2016 06:27 PM

You want to check and see if there is an allen set screw in the pulley that can be tightened down on that key. Most pulleys have them.

-- Bill - Mesquite, TX --- "Everything with a power cord eventually winds up in the trash.” John Sarge , timber framer and blacksmith instructor at Tillers International school

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