On 12/03/2014 09:28 PM, Leonardo Marsaglia wrote: > > Hello Jon and thank you for the explaination! > > So in theory I could use them as normal resolvers and output them to > LinuxCNC as several people did. Yes, resolvers are transformers where the coupling between rotor and stator coils varies as the shaft is rotated. You can excite the stator, or the rotor, the resolver really doesn't care.
The excite the rotor and read the two stator outputs requires sensitive A/D converters and logic that maps the result to sine and cosine angle values, but is quite accurate. The excite the stator and read zero crossing time from the rotor is very non-linear, so you need a correction table to convert to the exact angle. So, it LOOKS a lot simpler, but to get the same level of accuracy, you need about the same complexity. Fortunately, Analog Devices has reduced the whole thing to an $18 chip. Jon ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
