On Sun, 3 Jun 2012, andy pugh wrote:
Date: Sun, 3 Jun 2012 21:03:18 +0100
From: andy pugh <bodge...@gmail.com>
Reply-To: "Enhanced Machine Controller (EMC)"
<emc-users@lists.sourceforge.net>
To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net>
Subject: Re: [Emc-users] Encoder discs
On 3 June 2012 16:39, gene heskett <ghesk...@wdtv.com> wrote:
But its duty cycle was
about 57 on to 43 off,
I don't think duty cycle is all that important, unless it drifts far
enough to break the quadrature.
If you use analogue-output sensors with comparators to square them up,
then you can change the threshold voltage to set the duty cycle.
--
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto
Also if you use a transmissive encoder, a "resolver" plate with 2 sets of
slots with 90 degrees phase relation can make the light source and detector
size and placement less important.
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