Hi all,

Can anyone recommend a good source for robust optical encoders
(quadrature or even single output line, around 200 to 512 counts per rev)?

This is for the ongoing micro aerial vehicle project here at Cornell(OT
because we are using AVRs <G>). We
are currently using E9S encoders from API Harowe but they don't seem to
be very robust, if the shaft is not exactly perpendicular to the encoder
face or if the shaft's vertical position can change slightly (due to lift
on the rotor which is attached to it), the encoder will wear very
quickly. Are there any encoders which don't have this problem?

By the way, Cornell's robocup (robotic soccer) team just won the world
competition (F180 league) for the second time, and they use PICs
(17C766's) in
the robots. For more info, take a look at http://www.robocup2000.org and
http://www.robocup.org

Thanks in advance for any help anyone can give,

Sean

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