Re: [CAD_CAM_EDM_DRO] DRO: Newbie Q

Most of the usdigital encoders are quadrature.
Look at their linear 360 CPI strips. In quadrature that is 1440 per inch.
Dan
-----Original Message-----
From: Jeff Swayze <jswayze@...>
To: CAD_CAM_EDM_DRO@yahoogroups.com <CAD_CAM_EDM_DRO@yahoogroups.com>
Date: Wednesday, February 21, 2001 7:42 AM
Subject: [CAD_CAM_EDM_DRO] DRO: Newbie Q

>Hi Folks,
>
>I've migrated over from the 7x10 mini-lathe eGroup because I'm
>designing a DRO for my mini-mill and need some advice. I plan on
>using rotary encoders (probably from US Digital) and either PC-based
>or PIC-based software, but I'm now trying to figure out the best way
>to convert my linear motion to rotary. Here are a couple of the
>questions I'm facing:
>
>1) I've seen people using cable and pullies to drive their encoder -
>this doesn't seem wise. What's the consensis for the drive mechanism:
>rack&pinion or cable (or other?)
>
>2) Assuming I'm using a rack and pinion, it seems tough to find a
>combination that gives me more than 1 1/2 rotations per inch. Does
>anyone know if the encoders from US Digital (HP I believe) provide
>quadrature output so I can quadruple their resolution?
>
>I realize I'm probably re-hashing old conversation but I wasn't able
>to find anything in the archives. Please direct me to old threads if
>they're out there.
>
>Thanks,
>
>Jeff
>
>http://www.swayze.org/shop/
>
>
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