On 03/22/2015 07:57 PM, Jon Elson wrote: > On 03/22/2015 07:47 PM, Allen wrote: >> Andy, >> >> I'd like to know more about the resolvers on your machine. >> Can you share what they are and how they work? >> >> > Resolvers are transformers that vary their coupling as they > are rotated. One way to do it, a rotor winding provides an > excitation to a pair of stator windings that are 90 degrees > apart from each other. As one winding reaches maximum > coupling, the other is reaching zero. The coupling can be > "in phase" or "out of phase" so the resolver reading circuit > needs to determine both amplitude and phase of the sensed > outputs. There are several other ways to read position from > resolvers, too. > > Pico Systems (my company) makes stand-alone converters to > convert a resolver to quadrature plus index pulse. > > Since there are no electronics in the sensor, it is capable > of handling oil, vibration and high temperatures. > > Jon
IIRC they do rather well on rpm also. The resolvers on the servo motors for my Mazak were geared up 7x. Someplace I remember seeing a resolver rated at >50Krpm but cannot find the reference now. (naturally) Dave > ------------------------------------------------------------------------------ > Dive into the World of Parallel Programming The Go Parallel Website, sponsored > by Intel and developed in partnership with Slashdot Media, is your hub for all > things parallel software development, from weekly thought leadership blogs to > news, videos, case studies, tutorials and more. Take a look and join the > conversation now. http://goparallel.sourceforge.net/ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
