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.
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.
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.
band saw wheel alignment 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 won’t my bandsaw cut straight?
Band Saw: Why won’t my band saw cut straight? When the band saw cuts crooked, a dull blade, improper feeding, loose blade tension or not using a work piece guide could be the cause. Use the rip fence or miter gauge to guide the work piece uniformly through the cutting blade to make straight cuts.
How much tension should a bandsaw blade be?
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 are my bandsaw cuts wavy?
Re: Band saw Cutting Wavy Cuts. The clasic cause for wavy lumber is pushing a dull blade past it’s limits. Sharp don’t get it. On these low powered mills, the blade gotta be razor sharp..
Why do bandsaws wander?
Tim Inman: Because band saw blades ride on crowned wheels, they always have a little “camber” angle relative to the vertical axis of the wheel. This causes the blade to tip a little and makes the cut “pull” to the side.
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.
Why does my bandsaw blade 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.
Why do bandsaw blades break?
Machine Defects Even the best blades can fail if there is something else wrong with your bandsaw, and even a small misalignment of bearings or guides can put a twist in the blade as it goes around. Resulting in tension being applied in all the wrong ways which will lead to early breakage.