Non circular gears4/4/2023 ![]() ![]() Norden Laboratory Division of Norden-Ketay, and a few others are also using this technique. He has made the gears illustrated on p 158. Such a unit, coupled to a Fellows gear shaper, has been developed and used by Frederick Cunningham, Stamford, Conn. ![]() The tape delivers its instructions to the machine through a special control unit. The center distance between cutter and work, and the angular velocity of the work spindle, is varied in accordance with the instructions contained on a previously prepared tape, which can be paper, plastic, film or magnetic. Perhaps the most accurate way of cutting noncircular gears is the tape-controlled gear shaper. This involves danger of considerable error at the junction of two segments. ![]() Each segment is then cut separately on a gear shaper, so set up that the work rotates about the instantaneous center of the segment. Simplest method-but also slowest and most expensive -of making noncircular gears involves the division of the gear into several segments, each of which can be considered as approximating an arc of a circle. I've had good success with regular gears in wooden clocks, etc.ĬhrisDo not know if your local library can get a copy of this: My interest is primarily for for visual effect in dynamic wood sculpture. I am looking for CAD drawings, or software for creating, or a clear theoretical description for designing/cutting non-circular gears. ![]()
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