Jeff Epler wrote: > Why is it important that the signals be close to 90 degrees out of > phase? Here's why: imagine they're some smaller amount (e.g., 45 > degrees). That means that there's a smaller time for at least one of > the 4 states of the quadrature progression at any given speed. In the > 45 degree case, it makes the maximum accurate count rate only half of > what it could optimally be for a perfect 90 degree phase differences. > > Jeff
While others have answered the question already I would like to add that I was able to see a demo of magnetic rotary and linear encoders http://www.austriamicrosystems.com/eng/Products/Magnetic-Encoders/Rotary-Encoders at Embedded Systems Conference in San Jose CA yesterday. Very impressive resolutions can be achieved, 25 um with speeds up to 20m/s. I know this has been discussed before but seeing is believing. I hope that prices come down eventually. -- Rafael ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
