Woodworker's Journal 1994-18-3, страница 15

a band saw blade and tell by the sound it makes whether or not the blade is properly tensioned. II" you're tone-deaf or your hearing is as shot as mine is. you can check the tension by pressing on the side of the blade w ith your linger. Moderate pressure should cause the blade to deflect between '/s in. and I/-1 in.

PROBLEM ffft: Improper wheel till

A blade that is tracking properly will find a spot on the wheels and stay there. You can control where the blade rides on the wheels by making tracking adjustments. Blade tracking is adjusted by turning the tilt adjust knoh that causes the top wheel of the saw to tilt back and forth. The blade should lie on the machine and tensioned before this adjustment is made.

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SOLU'l ION:

By adjusting the tilt of the upper wheel, you can control where the blade rides on the wheels. It's easy to adjust blade tracking on a band saw w here both of the wheels are aligned on the same plane. I set my saw so the blade rides near the center of the wheels. Turn the wheels by hand lo verify that the blade is tracking properly. Many small band saws have cambered w heels, which ate higher at the center than at the edges. Blades lend to automatically center themselves on cambered w heels.

PROBLEM #7: Wheel misalignment

For a blade to track properly, both the upper and lower w heels (or in a ihree-wheel saw all three wheels) must be on the same plane. Occasionally, through moving, or for whatever reason, the two cast iron sections that comprise most saws 12 in. and larger, may slip out of alignment.

SOLUTION:

One way to detect a misalignment is to hold a straight edge (a large level works well for this) flush across the top and bottom wheels. 11 the straight edge isn't Hush at all points (assuming that wheel tilt is not the problem), (hen the wheels are not on the same plane. Loosen the bolts holding the two frame sections together. align the sections, then retighten the bolls.

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