Re: [CAD_CAM_EDM_DRO] Newall sperosyn encoders

> In a similar fashion, a long flat steel bar stock could have an edge cut
> with a sinusoidal pattern. This could be "read" by a Hall-effect
> sensor? Seems one has to induce a magnetic field in the "sine rack" (or
> balls) in order to "read" them.
>
> Alan KM6VV

Perhaps the Newall encoders use the balls as a variable core for coupling
two coils as is done in an LVDT. It might be possible to cannibalize an
LVDT to get the read head.

Doug