howard johnson linear motor version

thingiverse

Played with a rotary version and decided to get more accurate verification before investing more time. This is just the beginning - magnet areas have been made but they are ferrite ceramic purchased from harbor freight, 1 7/8" x 3/8" thick. To verify linear concepts first, then you can move on to rotary attempts. The idea is simple: place magnets in slots and a metal plate underneath, N poles facing up with the S pole touching the plate. A picture of a later rotary attempt shows how forces were too strong for a yogurt container as it flexed; similarly, measuring magnet placement on a can proved challenging due to its curvature.