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  1. bwinder

    Air coil (self supporting) mandrel/former help

    The machine in the video is a standard operation for forming self supporting coils. Usually automated, they wind the coil on a former and retract this former into a shaft/fence which allows easy removal of the coil (though sometimes anecdotally have found that automating the "ejection" of coils...
  2. bwinder

    Air coil (self supporting) mandrel/former help

    ~0.75" ID Initial volume is few hundred. Any leads BillPSU? I've spent the better of 4 years digging through patents but have not turned up a "winner". Right now I'm using an alnico donor from a field sample with multiple layers of kapton. Ideally I'd like to setup something like in the...
  3. bwinder

    Air coil (self supporting) mandrel/former help

    I'm looking for an old tried and true design for a mandrel or former in which to wind or form bondable magnet wire into free standing coils, which will allow the finished coil to be ejected or removed with minimal distortion, ideally none. The machine I'm winding on has a typical "chuck" found...
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