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: > > 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. 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/ _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
