Re: [CAD_CAM_EDM_DRO] Re: Newall sperosyn encoders

Bill Griffin wrote:

> I have the Newall systems on my compact 8 lathe and knee mill, they
> are great! I had posed this question ages ago here on the list. As I
> recall, someone mentioned a chip that would make reading the scales
> (tubes filled with precision ground balls) easier.
>
> I also suggested using a MR head to read a magnetically encoded
> scale in a similar fashion to a credit card encoding. Encoding
> magnetic tape with the bits would be fairly easy if someone could
> work out the readheads.

Heidenhain has a system that works like this. But, the scales are
pretty expensive, and the heads are REALLY expensive.

Encoding the tape ACCURATELY might not be so easy as it sounds.

Jon