I have a 14" Jet bandsaw that as of recently refuses to cut in a
straight line. The blade consistently drifts at about a 10 degree
angle, making attempted 90 degree cuts come out to something like 80
degree cuts. I tried tuning the saw the following way:
-Checking blade tracking on both tires (tires look worn, but
servicable. When the rotation direction is reversed, the blade shifts
position to a new location, about 1/2" drift, and returns back to
original position when normal rotation is resumed). During normal
rotation, blade tracks along top of tire.
-Checking guidepost alignment. Guidepost is as parallel as I can make it.
-Checking blade tension. As best as I can figure, the blade is
-Checking guideblock alignment. Guideblocks are the black plastic type,
but are installed correctly.
-Checking bearing alignment. Blade overlaps bearing by 1/4" or so, more
than the recommended 1/8"
To be sure, on the bandsaw I have limited ability to remove wheel twist
and out-of-parallelism. Besides, until recently the saw worked
perfectly, so I am assuming I simply need either new tires or a new
blade. The tires are original (10+ year old saw), and the blade could
be losing the set.
As it stands, the bandsaw is unusable, and I would appreciate any
insight or help. None of the websites I checked addressed this specific
problem, other than providing general tuning procedures. Thanks in advance.
Andrew Resnick, Ph.D.
Department of Physiology and Biophysics
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