20 Aug
2009
20 Aug
'09
10:29 p.m.
On Thu, Aug 20, 2009 at 05:21:10PM -0700, Ken Restivo wrote:
On Fri, Aug 14, 2009 at 10:19:25PM +0100, Folderol
wrote:
An index pulse is a unique output of the encoder that can be recognised
by the microcontroller for some purpose. Usually to recognise a home
position.
The other pulses emitted by the encoder correspond to movement in a
position beyond the index pulse position.
Obviously, you'd need an encoder that has this feature. There are very
simple encoders that don't have it ... e.g. the X and Y optical encoders
in older "non-optical" ball mice.
--
James Cameron
http://quozl.linux.org.au/
Double Hmmm
Fix it so that the index pulse is at exactly the halfway point in the
travel, and it will 'silently' re-calibrate itself every time you pass
throgh that point.
I don't know what an "index pulse" is. If you could point me to some
good introductory reading material on dealing with encoders, I'd find
it very interesting indeed.