Re: [CAD_CAM_EDM_DRO] PIC DRO stupid question #2

In a message dated 04/06/2000 7:58:38 AM Hawaiian Standard Time,
jmelson@... writes:

<< Really, if someone can come up with accurate grating patterns on film or
glass, it is fairly
easy to make your own linear encoder. Does anyone have any ideas on
where to get
such grating patterns?

Jon

>>

Jon,

There may be a space limitation on this hypothetical kluge. I was
wondering what happens if you used say 3 of the 360 line strips, mounted them
side by side, each 1/3 of a division offset from the previous. I don't have
the signaling worked out but could it not give you much finer resolution? A
crude but cheap and possibly effective solution for the lack of finer
gratings?

I know that some of the linear scales often get contaminated with oil etc.
Do they not sell replacement grates for refurbishing? I have not had failure
with mine but I would want to buy the gratings as repair parts.

IMHO
Peter
THRD, Inc,