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Bandsaw Tracking - Does it have to be this difficult?

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Forum topic by Peter Oxley posted 1866 days ago 2699 views 0 times favorited 11 replies Add to Favorites Watch
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Peter Oxley

1426 posts in 2511 days


1866 days ago

Topic tags/keywords: bandsaw tracking adjustment tuning blade change

I have my bandsaw tuned up just right. I can resaw 8” Hard Maple with almost no blade drift. The wheels are coplanar, and I can go from 1/4” to 3/4” blades with a quick adjustment of tension and guide bearings.

But I can’t get a 1/8” blade to stay on – it quickly wanders off the front edge of the bottom wheel. Significant changes in tension make no difference. By adjusting the angle of the top wheel to the limit, I can get the blade to stay on the lower wheel, but just barely – the blade rides on the rim, not on the tire. I might be tempted to settle for that, except the guide bearings don’t come any where near the blade.

I would sure appreciate any suggestions!

-- http://www.peteroxley.com -- http://north40studios.etsy.com --


11 replies so far

View PurpLev's profile

PurpLev

8476 posts in 2285 days


#1 posted 1866 days ago

for what it’s worth, I always have to change the angle on the top wheel when switching between 1/2” blade and my 3/16” blade. but both do ride on the tires, and I’m able to set my guides properly for each. the guide limitation might be based on the BS model though – I know that Carter makes guides specifically for 1/8” blades since on some BSs it’s impossible to use the factory set.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

View Tony's profile

Tony

978 posts in 2667 days


#2 posted 1866 days ago

Hi Peter

On my Delta 18”, I can change from 1 1/4” down to 1/8” without any adjustments of the wheels. I do have to adjust the roller bearings to support the blade at the rear and the sides, but every bandsaw has to do this when a blade is changed.

The guides do/should not affect the tracking of the blade on the wheel – they are only there to help support the blade when the blade is under pressure/load. You should be able to remove the guides totally and get any blade to track dead centre on both the top and bottom wheels. If you cannot do this, then either you have a wheel alignment problem, or maybe the tyres need changing.

Have you checked the 1/8” blade – maybe it is warped/twisted or kinked slightly, it does not take much, especially with a fine blade to make wander – the wider the blade the more forgiving it is.

Good luck.

-- Tony - All things are possible, just some things are more difficult than others! - SKYPE: Heron2005 (http://www.poydatjatuolit.fi)

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Bob #2

3808 posts in 2658 days


#3 posted 1866 days ago

Peter, try a different blade.
I sounds like you have a bad splice making the blade wander either in or out.

p.s. Can you cut and solder it?

p.s. HiTony!
Bob

-- A mind, like a home, is furnished by its owner

View Evie's profile

Evie

37 posts in 1960 days


#4 posted 1866 days ago

Hi Peter. gosh I am having the same problem. I just got me a bran new Grizzly GO555 band saw. I went from a 3/4 blade to a 1/8th, and that thing just wouldn’t set in the middle no matter what I did. my saw has a cadge on the back for the thickness of blade I use.(tentioning) and I set the blocks, or in my case bearing wheels back.
walked my blade on the wheels., tires, and gosh it took for ever to get it centered. then moved the wheels up to the blade, used the dollar bill to make it right. and it just kept slipping off the tire. played with that thing for ever. so then,,, I just placed the blocks behind the blade, made them tight so the blade couldn’t get stuck, got the blade up as close to the middle as I could, and cut some stuff. I know. not good. but I felt safe enough, that the blade would not come off the back. or front. funny thing was. the blade seemed to set in place. and didn’t come off even when I adjusted the blocks, wheels in my case. I figured that the rubber tires on my wheels. was grooved to the 3/4 blade and the 1/8 just didn’t wont to seat well. I probably had the tension set to tight in the first place and of course a grove. it all works great now. don’t know if this helped. but from a newbie. this worked for me. Evie

-- If you don't learn from the past, your doomed to repeat it.

View Tony's profile

Tony

978 posts in 2667 days


#5 posted 1866 days ago

Hi Bob

-- Tony - All things are possible, just some things are more difficult than others! - SKYPE: Heron2005 (http://www.poydatjatuolit.fi)

View Karson's profile

Karson

34870 posts in 3037 days


#6 posted 1866 days ago

If the blade is good then it should be able to be tracked. I’ve got an oplder Sears that I use for my 1/8” blades and larger blades on the bigger machine. So I can’t say for sure what I’d have to do on my big machine to get 1/8” blades to track.

-- 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 †

View Peter Oxley's profile

Peter Oxley

1426 posts in 2511 days


#7 posted 1791 days ago

I think I’ve figured it out, guys!

My wheels are in alignment vertically – if you lay a straightedge across the rims right next to the hubs, they are dead-on.

My wheels are not in alignment horizontally – if you lay a straightedge across the rims near the front or rear of the wheels, they are way off.

So, tilting the upper wheel and adjusting the wheel position on the axles doesn’t solve the problem. The upper arm is not correctly aligned with the base, and there’s no adjustment for that. Apparently the solution is to turn the upper arm assembly slightly. I haven’t done this yet, because it means partial disassembly of the saw and removing the alignment pins, which I’m not looking forward to.

I have a feeling this is why I break so many blades, too.

-- http://www.peteroxley.com -- http://north40studios.etsy.com --

View Jim Jakosh's profile

Jim Jakosh

11341 posts in 1742 days


#8 posted 1505 days ago

HI Peter. I can see where the wheels out of alignment that way will drive the blade off, but I think that would do it on a 1/4” as well. Does the 1/4” blade have that problem too?
Also, do you have a 6” riser on the saw for cutting 12” thick wood? The riser is pinned and screwed in at both ends and that might be the casue if you have one.

Take the blade off and check to see if one of the wheel mounts is loose or a bolt or a pin fell out. There might be a simple fix for the alignment problem. A totally whacked out bearing might also put the wheel at an angle but I think that would make a bit of noise. When all else fails , call the manufacturer.

What make and model saw do you have?

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View Peter Oxley's profile

Peter Oxley

1426 posts in 2511 days


#9 posted 968 days ago

After putting up with this problem for ages, I finally removed the upper arm from the saw, removed one alignment pin from the riser block, and un-shimmed the lower wheel.

When I replaced the upper arm, the missing alignment pin allowed the arm to rotate on the riser block. I was able to get the wheels to align at the inside, center, and outside to within about a 32nd of an inch. The first blade I put on was the 1/8”, and it tracks great!

If anyone else is having similar problems, this might be the solution.

-- http://www.peteroxley.com -- http://north40studios.etsy.com --

View gfadvm's profile

gfadvm

10760 posts in 1327 days


#10 posted 967 days ago

Peter, Sounds like you solved it but I have to weigh in with the fix for mine. I could get everything from 1” to 1/4” to track but could NOT get the 1/8” to track. After fighting it all afternoon I called the Grizz tech line. He went through all the things I had tried and finally asked me to decrease the tension. It tracked perfectly! I don’t know why but those blades don’t like (or need) much tension. I have never had a problem since. Too simple.

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

View Peter Oxley's profile

Peter Oxley

1426 posts in 2511 days


#11 posted 967 days ago

Thanks gfadvm for sharing another possible solution. Band saws are so handy, but a little finicky!

-- http://www.peteroxley.com -- http://north40studios.etsy.com --

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