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charlie b
 
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Default Band Saw Neebie needs help with resawing

Bubba wrote:

I've come into the possession of 14" bandsaw. I've installed and tured
new tires, adjusted the guides, ran a tuning stone on the blades. I have
about a 15 degree drift when I try to resaw a board. This drift is
present with a 1/2" and a 3/8" blade. Can anyone offer a solution?


Sevaral things can cause "drift".

The "tire" on the bandsaw wheels have a slight crown to them.
Unless the blade rides centered on that "crown" the blade will
"drift" left or right of straight - left if the blade is foreward of
the crown, right if behind the crown (see the drawing on this page)

http://home.comcast.net/~charliebcz/Resawing1.html

Another possible reason for "drift" is the teeth set - typically
one left, one right, ... But if some are set more to the left or to
the right they can "pull" the blade off line.

Yet another source could be that the upper wheel, which moves
to tension the blade, may be leaning. If the top is leaning fore
ward the blade will ride farther foreward of the tire crown
causing the blade to drift "left". If the lean is great enough
the blade will tend to wander off the wheel.

Then there's the blade guides that might be the culprit or at
least a co-conspirator. If you have bearings or "cool blocks"
on either side of the blade and they are mounted cocked a little
they can twist the blade slightly and cause drift/lead.

Now you could, and probably should, get all the alignments
right. BUT - if your fence angle can be adjusted to the drift/
lead angle you can make good straight cuts against it. Might
consider making a larger bolt on table top and fence like
this one - the idea from an article and illustrations in a
woodworking magazine.

charlie b