Re: Newall sperosyn encoders

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.

As I recall, someone mentioned a chip that would make reading the
scales (tubes filled with precision ground balls) easier.

http://www.grifftek.com/c8dro/c8dro.html

Bill Griffin

--- In CAD_CAM_EDM_DRO@y..., Alan Marconett KM6VV <KM6VV@a...> wrote:
> Hi Les, List,
>
> Neat idea! Who's going to try it? I wish I had more time for
projects!
>
> 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
>
>
> Les Newell wrote:
> >
> > Has anyone come across Newall spherosyn DRO encoders before?
> > The scale appears to be a tube filled with steel balls and the
position is
> > sensed magnetically. They have some info on their website
> > http://www.newall.co.uk/Spherosyn_Microsyn.htm but the
description of how
> > they work is a little vague. I wonder if this idea could be
copied for a
> > home-made DRO.
> >
> > Les
> >
> > Addresses:
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> >
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