The box says "linear grating scale" , I assume these are the "glass
scales" everyone thinks so highly of - supposed to be .0002" sensitivity
. Anyway . I'm wondering what the tolerance for lateral/up-down movement
is with these . X and Y are no problem , but the only reasonable place
to attach the read head on the spindle has about .050-.060" rotation . I
have already designed a guide bushing device to prevent the rotation ,
but I just got to wondering . How sensitive are these scales ?
--
Snag
"They may take our lives but
they'll never take our freedom."
William Wallace

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On 3/17/2024 9:37 AM, Jim Wilkins wrote:

In optics a grating is evenly spaced parallel lines, not a 2-way grid.

I don't know what's inside those scales ... I just know that they're
supposed to be much better than the capacitive scales I was using with
the old unit . And more expensive too and I don't want to take a chance
on breaking one .
--
Snag
"They may take our lives but
they'll never take our freedom."
William Wallace

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