If.there’s a gap, your wheels are not. A crowned wheel has a.slight hump where the blade rides. Check the wheel alignment with your resaw blade mounted and tensioned.
I have heard of people who needed to add washers or shim to the bottom wheel mount or shaft to move the wheel out and align it. It would appear either the bottom wheel or the top wheel be moved in/out for alignment. The blade runs at the back of the top wheel and the front of the bottom wheel.
Now tilt the top wheel by adjusting the tracking-adjustment knob until the straightedge barely touches the lower wheel. If possible, move the outermost wheel in to correct the alignment rather than move the inner wheel out. Tension the blade-You tension a bandsaw blade by turning an adjustment screw, which moves the top wheel farther away from the bottom wheel and thus stretches the blade.
The proper and necessary procedure for bandsaw wheel alignment will not only help to maintain the life of a saw blade but the bandsaw machine as well. Check the alignment between the top and bottom bandsaw wheels and the installed blade to assure that the bandsaw blade is installed correctly. Once the misaligned wheel is detected, it is time to remove the bandsaw blade and the misaligned wheel.
Generally the saw comes from the manufacture with the alignment it should have. If you have just purchased a used saw perhaps the saw was dropped at one time or another or someone has jury-rigged or lost parts making it off. If the saw isn’t very old you might start by downloading a schematic on the saw and see if all the parts are there.
how to align bandsaw wheels Related Question:
Where should a bandsaw blade sit on the wheel?
Make sure the machine is disconnected from the power supply. When tracking, you always want to make sure that the blade is sat on the crown of the wheel, with the deepest part of the gullet in the centre.
Why is my horizontal band saw not cutting straight?
Make sure the blade is running in the correct direction. On machines powered by three phases power so it is common to get the wiring reversed and have the blade running the wrong direction. On all vertical blade bandsaws the working portion of the blade should go down. This forces the workpiece down into the table.
What is the correct tension for a bandsaw blade?
For carbon steel toothed blades (cutting blades) this is typically 15,000 to 25,000 PSI. Slitting type blades typically are tensioned in the range of 12,000 to 20,000 PSI. In general bandsaw blades are never tensioned past 35,000 psi.
Why does my bandsaw wobble?
The blade on a saw left idle for long periods of time can leave an impression in the rubber tire which might cause erratic tracking. Purchase and install aftermarket replacement tires. (Search for “bandsaw tire” at woodcraft.com.) If you still see a back-and-forth motion, the culprit is probably the wheel itself.
What causes bandsaw drift?
Drift is cause because the blade buckles under the load. You can see that by stretching a ribbon between 2 points and applying a pressure to one of the edges, it will turn sideway easily. A sharp blade and high blade speed will help a lot with that.