Re: Great deal on rotary encoders

> From: "Tim Goldstein" <timg@...>
>
>I did some of the calculations and if I worked it out correctly the LPI for
>this encoder is 354.5 So, using the 10% tolerance it looks as if the US
>Digital 360 LPI strips are the ticket and no one has to pay for tooling.
>
>Now, who can check this out??

Hmmmm... With an optical radius of 11mm, or .4331", gives a
circumference of 2.7211". Divided by 2048 we get .0013", which is
about 752.6 LPI. OK, OK, so I ought to use the formula for a chord,
but that's not in my HP48, and I'm lazy ;)

Or did you use an optical radius of 23.36? Hang on...

<calculate... calculate...>

Yup, just worked it out, that's what you did. OK, so is there a head
available that works with the 11mm wheels? If so, that gets us a
resolution of .0003" which is great. If folks are annoyed by output
that doesn't end in a 0, 2, or 5, I'll add code to the DRO software to
round it off.

-Tom Kulaga