On 02/01/2015 11:05 AM, Kirk Wallace wrote: > On 02/01/2015 08:36 AM, andy pugh wrote: >> On 1 February 2015 at 16:25, Kirk Wallace <kwall...@wallacecompany.com> >> wrote: >>> However, they are >>> inflexible in their application, and must be specifically "tuned" to >>> meet the drive system requirements >> I wonder what that means, and if it is even true? >> > I know very little about resolvers, but I think it means that resolvers > are analog so one needs to determine what the 100% and 0% signal values > are, and values in between (to deal with linearity) to convert to data. > Encoder signals are ether on or off and directly usable for data. > Yes, you need to set the device reading the resolver for the transformer ratio of the specific resolver. Linearity is not a problem. These things are built to insane precision for the aerospace and machine tool industries. If you read the data sheets on them, they are tested with a goniometer and precision resolver display to arc seconds of accuracy.
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