The old machines at the Sartell paper mill were run with flat belts, they ran on slightly tapered cone pulleys, so the belt could be shifted to change the draw. The widest belt was 6 inches and transferred a couple of hundred horsepower from a line shaft in the basement up to the machine. The line shaft was run with a 1,000 hp steam turbine. The splices in the belt were a long tapered glued splice, and they were cured in a heated press, and then stretched on with a 6 ton com-a-long. The were glued and cooked after stringing them around the shaft, there was always a spare belt off to the side ready to be stretched on after a failure. They ran like this up until about 2011.
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Today's Featured Article - The Ferguson System Principal An implement cutting through the soil at a certain depth say eight inches requires a certain force or draft to pull it. Obviously that draft will increase if the implement runs deeper than eight inches, and decrease if it runs shallower. Why not use that draft fact to control the depth of work automatically? The draft forces are
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