xssve -> RE: Input from fucking machine users (8/6/2012 1:00:22 PM)
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A flywheel design poses some interesting problems, which are resolved in linear motors, but they aren't cheap - stroke depth in a flywheel design is limited to the diameter of the flywheel (which is why you can't modify a sawzall - to get a 3" stroke length you need a 3" flywheel). You could mount the shaft to the flywheel on an adjustable rail, but since it's spinning around, the adjustment apparatus would have to be wireless, or the wires would just twist up. And, ideally, you would need to be able to adjust stoke length and stroke depth independently, which means a total of three motors, the drive motor, and at least two smaller auxiliary motors or servos, one of which probably needs to be RC. I've amassed quite a collection of hardware, including several DC motors, Two out of an electric wheelchair, and several pancake motors, out of scooters, etc. (those electric cars for children have DC pancake motors), and several types of linear adjustment mechanisms, I just haven't had to me to turn it into a working model.
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