Alois's bandsaw sawmillThis article also available in German
Thank you for your excellent plans and your great tips and advice.
I could learn a lot from your saw and, built it as you recommended, from hardwood and as a "stand-alone" machine. But I would have been too lazy to keep converting a bandsaw back and forth into sawmill mode.
I got my sawmill a little larger. If I start something like this, I want to do it right.
The saw is built so that it can be put together or taken down by one person. Two people makes it easier. The frame for the saw is held together with four screws like yours, and consists of three pieces. The sawmill head can be moved with a small cart.
I used ball bearings for the rollers because of the weight. There is also a roller on the bottom to prevent the saw from tipping. If the frame warps, the rear rollers can lift off the frame diagonally a little by two or three millimeters (a design flaw)
The belts are tightened using an M8 screw. The motor (3000 watt output, 400 volt, 2800 RPM) is clamped directly onto the frame. The belt guard is mounted to the motor and moves with the motor as the belt is tightened.
I tighten the blade to 14.000 PSI tension, which is determined by how much the blade stretches over a certain length (more on that).
With a blade cross-sectional area of 27,82 square millimeters (26*1.07mm), by my calculations this is a tension of 2900N on the blade (each side), for a total "weight" on the wheel of 590 kg.
I might upgrade the fixed shaft to 40mm because my present 30 mm shaft deflects too much and I need to add too many shims to compensate.
Height adjustment is set up so that each increment on the wheel is 2 mm, which is almost exactly the width of the cut. I use blades from Woodmizer. Each blade (360 cm long) costs 20€. The quality of the blades is excellent.
I have magnetic strips to stick to the ruler. The strips are the same thickness as the boards I want to cut. This way I can divide the log into desired thicknesses. This speeds up adjustments as I cut.
The homemade ceramic blade guides work very well.
More by Alois:
Alois's wood briquette
Alois's table saw laser
More reader projects on woodgears.ca