Bandsaw Tension & Tracking Assembly
As a result of our extensive research into the effects of wheel crowning and its relation to blade tracking, we've achieved a level of tracking tenacity never seen in band saws and certainly not in three-wheeled band saws.
We had to.
It wouldn't be a very good corbel saw if you couldn't back out of an 18" deep Doug Fir kerf without pulling the blade off the wheels.
HIGH Tension is NO Substitute for CONSISTENT Tension
Falberg saws can do that because our tensioners have always allowed for an inch of free play in the tensioning slot; meaning that if you bump the blade while you're getting into position on a beam, or if you pull the blade an inch or two out in front of the blade guides while backing up, the tension will remain constant and the blade will find its way back to top center on the wheels.
But, as our frames got stiffer and we started using more tension to eliminate blade "flap", we found that our tensioners, like ALL tensioners, tried to bind against the backplate; or the "slide" as they're often called. (A terrible misnomer, since they act more like a brake than a slide).
The reason they do that is because the springs are NEVER in line with the wheels, they can't be, or they'd be right there inside the wheel wells. So spring tension is applied off-center to the direction of its load, creating a circular path of spring force around the wheel's axle. Levering this circular force into a straight-line slide makes it look more like a braking device.
So we took advantage of this leveraging action to eliminate a bunch of unnecessary parts and simplify the tracking adjustment. Sure enough, the simpler Tension and Tracking Assembly, (shown at right), eliminated practically ALL blade flapping, and at a much lower tension. Stated more simply yet: we're getting more power to the blade using less tension, smoother kerfs, more tracking tenacity, and easier adjustment of both tracking and tension. It is now possible to adjust both while the saw is running.
Yes; dynamic tracking and tension.
No more hand turning.
(You do still have to hand-turn to adjust the drive wheel tracking. I'll work on that.) No one can solve the world's problems, but it's immensely gratifying to solve one of the world's band sawing problems - I'm celebrating a major breakthrough here. I just wanted to share that. I hope you get a chance to operate this American-made tool someday.
Frictionless Tensioning on Falberg Band Saws
While you're staring at this picture, focus on the spinning wheels. You can see the saw is running, right?
Now focus on the blade; can you see any blur from the blade flapping?
That's because the blade isn't flapping. All the irregularities of the blade are being absorbed by the spring-loaded Frictionless Tension and Tracking assembly, barely visible behind the spoke's blur of the outside transport wheel.
TENSION & TRACKING ASSEMBLY
Does your tensioning assembly ever respond to variations in tension? It bet it doesn't. If you don't have frictionless tensioning, your tensioning wheel probably binds up every time you load the spring. Why bother with springs at all if you're just going to clamp the wheel in place?