Thanks Andy,
That doesn't sound particularly hopeful for me and my plans. I guess maybe
a more traditional/proven approach of a through-beam sensor with
interrupting disk and much much lower resolution encoder ring with
drilled/milled holes might be the way to go.
But to make sure this AEDR thing is really dead. Any reason to believe the
AEDR-831X single channel units, which are the only way the 36tpi units
seem to be available, have the same actual reoslution restriction? If
there is only one channel then are they really looking for a fixed line
width? There would be no offset second sensor at a fixed pitch to require
that. I have the space to mount two single channel units, build in a
little adjustability in their mounting to get them "clocked" correctly to
get a quadrature signal.
Anyone have any idea what an AEDR-8311 is? The data sheets I can find only
detail 8xx0, no idea what the last 1 is for.
Any other options I should be looking at? I didn't see anything super
compelling when I spent 3 hours of my life reading through the datasheets
from the digikey optical sensors - reflective section. I'm working with a
~2" ID mounting for my encoder ring, so options for adapting an off the
shelf encoder ring seem low as not many are that large.
Dave
On Wed, 31 Oct 2018 16:48:46 -0400, andy pugh <[email protected]> wrote:
On Wed, 31 Oct 2018 at 19:00, David Berndt <[email protected]> wrote:
if so was it with one of the one channel output units
instead of 2 channels or how did you handle creating such a fine
pattern?
Any other details about how it was done and how well or not well it
works
I used a 2 channel. I ended up having a target laser-cut by a company
who specialise in PCB stencils.
This might currently be pretty inexpensive from China, for example:
https://www.seeedstudio.com/stencil.html
It never worked all that well, though. I rather struggled with
soldering the devices, as at the time I had no hot-air or reflow oven.
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