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Need Band Saw Adjustment Advice

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Forum topic by SueNH posted 05-28-2010 01:51 AM 1186 views 1 time favorited 8 replies Add to Favorites Watch
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SueNH

19 posts in 2548 days


05-28-2010 01:51 AM

I have a 14” Powermatic Band saw. I am trying to adjust a 1/2 inch blade on the wheels, but it just won’t center properly. I have checked the alignment of the two wheels and they are dead on. But the blade still won’t center on the two wheels. I can’t get it to travel (waver) less than about 1/16th inch when I spin it manually. It seems much worse when I power it up.

Anyone have some suggestions on what I might do to solve this problem?

Thanks…baffled in NH.


8 replies so far

View a1Jim's profile

a1Jim

115202 posts in 3042 days


#1 posted 05-28-2010 02:09 AM

Hi Sue
Sounds like you have bad blade or your tire is worn out.

-- http://artisticwoodstudio.com Custom furniture

View docholladay's profile

docholladay

1287 posts in 2523 days


#2 posted 05-28-2010 05:09 AM

I don’t mean to mention the obvious, but I would first check the tension on the blade and then check the adjustment of the thrustbearings and/or blade guides. Also, as Jim as stated, you could have a badly worn tire/s.

-- Hey, woodworking ain't brain surgery. Just do something and keep trying till you get it. Doc

View Michael Murphy's profile

Michael Murphy

452 posts in 2470 days


#3 posted 05-28-2010 05:47 AM

I have a PM 14” band saw. As far as I am concerned it works as well as it is set up. As long as the tires ar sound, if a blade won’t stay on the wheels it is probably the blade.

What does it do? pulse back and forth or what?

-- Michael Murphy, Woodland, CA.

View SueNH's profile

SueNH

19 posts in 2548 days


#4 posted 05-28-2010 12:51 PM

Hi,

Thanks for the feedback. the problem, as Michael Murphy noted, is that the blade pulses back and forth. When I seated it as “centered” as I could on both wheels, I set the bearings/guides and the tension to what they should have been and turned it on. Alas, it pulsed back and forth. So, how would I know if it’s the blade or the tires?

The tires do not seem worn in any spot, but maybe some advice on what to look for more closely regarding that part of the tool would be helpful.

Thanks to you all!

Sue

View barryvabeach's profile

barryvabeach

159 posts in 2508 days


#5 posted 05-28-2010 01:15 PM

Sue, take some chalk and put a mark and on the blade . Then with the upper door open, slowly turn the wheel by hand and watch the distance between the thrust bearing and the back of the blade as you turn the wheel. Make a mark with chalk on the upper wheel when the back of the blade is closest ( or fartherst) from the thrust bearing then continue to spin the wheel. If there is a problem with the wheel, you will see that distance from the thrust bearing keep repeating each time the mark on the wheel hits the same position. More likely, you will see that the wobble varies in relation to the blade and you can confirm it by making another mark on the blade where the wobble takes it closest to the thrust bearing, and then turn the wheel a few more times and you will see that each time it wobbles, you see the same mark on the blade in the same location. That rules out any problem with the wheels.

View SueNH's profile

SueNH

19 posts in 2548 days


#6 posted 05-28-2010 02:11 PM

Barryvabeach (Barry?),

Thanks for the tip. I will try this and let you know the outcome.

Sue

View SueNH's profile

SueNH

19 posts in 2548 days


#7 posted 05-28-2010 08:33 PM

barryvabeach’s suggestion was great. I tried it and, lo and behold, the wheels are good and the blade is bad. Changed the blade and back in business.

Thanks to all you responders!

View barryvabeach's profile

barryvabeach

159 posts in 2508 days


#8 posted 05-29-2010 03:25 AM

Sue, glad you got it licked. I need to let you know that a year or 2 ago I had the same problem and was stumped, I posted the question and got the answer I gave you, and sure enough it was a bad weld. So it probably won’t be long before you will see someone with the same problem, and you will be helping them solve it. Barry

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