Wednesday, November 19, 2014

Drive Belt Tension

Before I bought a spinning wheel, I wanted a nice wooden screw tension on the drive band.  The wheel that I bought had a steel screw, so I bought the tools and jigs, and learned to make wooden screws.  It took a while.

While I was learning to make wooden screws, the issue of vibration in spinning wheels/ flyer/bobbin assemblies came up, and I put a lot of effort into damping vibration.  I learned that I really like gravity based drive belt tensioning systems.

Springs can work very well, but ultimately, gravity is simpler and easier to use. Being easier to use, ultimately, gravity results in higher productivity.

Some will say that vibration is not a problem in their spinning wheels/flyer/bobbin assemblies.  To which I reply, "Christmas is coming, the goose is getting fat, . . . . .. .."

As you spin faster, at some point, vibration will be a problem.

Until recently, I had been using a system of weights and springs to damp vibration, but the change in geometry allowed me to do away with the springs and weights.  Or, rather the waxed cotton drives  bands become the springs, and the accelerator wheel and the flyer/bobbin assemblies are the weights.  Under static load cotton is not much of a spring, but under dynamic conditions where it is vibrating, it does act as a spring. 

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