machinist tools and supplies plastic dana making machine price:3D Printed Magnetic Switches Promise Truly Custom Keyboards

machinist tools and supplies plastic dana making machine price:3D Printed Magnetic Switches Promise Truly Custom Keyboards

  I already thought of that! With a standard 4mm-of-travel switch the “levitator” (magnet repelling the magnet in the body) should be far enough away from the body and stem magnets at rest (keyup) that it won’t have a (non-trivial) impact on the longetivity of the magnets.

  The magnetic force being exerted on the body magnet from the levitator magnet at rest is so small as to be mostly irrelevant. The only time the levitator comes into play is on keydown when it gets close to the body magnet (and “softens the blow”/smooths the force curve, as it were). Considering that it’s down at that level for just milliseconds with each keystroke I don’t think it’s realistically ever going to be an issue for anyone.

  The levitator isn’t even that important: It’s primary function is to aid returning the switch to its original position and to do that it doesn’t need much strength. It has a *secondary* function of softening the force when you bottom out the switch but that’s not why I added it to the switch design… Some keycaps can be very heavy and some 3D printing materials have strong-enough stiction (e.g. resin) that the switch could get stuck down without it (the levitator).

  I’d also like to mention that if you make yourself Void Switches with slightly less travel (3.5mm or less) you won’t need the levitator at all. There’s plenty of strength in neodymium magnets to return the switch to the keyup position with such shorter travel distances. You can still soften the feel of bottoming out with silicone o-rings or similar (e.g. thin printed TPU parts).

  I’ve got a low-profile version of my Void Switch that has only 2mm of travel and uses 4x1mm magnets… I’m not using the levitator in those because it’s unnecessary.

machinist tools and supplies plastic dana making machine price:3D Printed Magnetic Switches Promise Truly Custom Keyboards

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