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Forum topic by Iggles88 posted 05-17-2012 12:34 AM 1007 views 0 times favorited 7 replies Add to Favorites Watch
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Iggles88

247 posts in 1085 days


05-17-2012 12:34 AM

Quick question. Is the fact that a blade runs true on the crown of a bandsaw mean that the wheels are definitely coplanar to eachother?


7 replies so far

View BilltheDiver's profile

BilltheDiver

232 posts in 1610 days


#1 posted 05-17-2012 04:19 AM

NO. It means your tracking adjustment is properly set.

-- "Measure twice, cut once, count fingers"

View killerb's profile

killerb

150 posts in 1122 days


#2 posted 05-17-2012 01:11 PM

No. Coplanar is not a big thing. Crowning your wheels makes all the difference. bob

-- Bob www.bobkloes.com

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Iggles88

247 posts in 1085 days


#3 posted 05-17-2012 04:37 PM

Im not saying I don’t believe you because I’m sure you know much more then me but everything I’ve ever watched or read about bandsaws says that the wheels must be Coplanar or the tool will not run correctly. Im questioning that because if my blade tracks true and the wheels aren’t Coplanar then it must not be true

View Loren's profile

Loren

7809 posts in 2372 days


#4 posted 05-17-2012 06:46 PM

There are different methods of band saw setup. Co-planar is
one of them.

Crowning the tires causes the blade to run on the crown and
this can be a good thing with narrower blades. With wider
blades I prefer a flat wheel.

It may be helpful to set one leg of a square on the table
in from of the blade and see how square the relationship is.
In many cuts this isn’t relevant but in cutting corbels, for
example, it can be.

-- http://lawoodworking.com

View flatboarder's profile

flatboarder

99 posts in 1581 days


#5 posted 05-17-2012 07:16 PM

Hey Loren, do you mind if I asked you a question ? I hope not . I just recently bought a new BS and Ive the blades wobble a little .I think there is too much taper on the front of the tires.could that cause the wobble.

-- Ive cut this board three times and its still too short?

View IrreverentJack's profile

IrreverentJack

724 posts in 1567 days


#6 posted 05-17-2012 08:55 PM

Matthias Wandel explains crowned pulleys on his site . I found some of his other bandsaw posts helpful too. -Jack

View Loren's profile

Loren

7809 posts in 2372 days


#7 posted 05-18-2012 12:15 AM

A little blade oscillation is common and it may not affect
cuts much as long as the upper guide is set close to the
work. Band saws don’t cut the same style of surfaces
circular saw do, so you’ll have to forgive the band for
wandering a bit even when the setup is meticulous,
because that is its nature.

Dunno about the degree of crown causing a wobble, but
I would check the tires to make sure they run true. You
can true rubber tires with a lathe chisel. On the lower
wheel it is easy do – just rig up a tool rest and turn the
saw on. Remove the blade first.

On the upper wheel have an assistant turn the wheel
using a rubber sanding drum chucked into a handheld
drill.

-- http://lawoodworking.com

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