On Sat, 9 Feb 2008, Stuart Stevenson wrote: KKKK > Date: Sat, 9 Feb 2008 08:30:40 -0600 > Maybe the reason everyone uses digital is there is no good/cheap > way to get the analog signal into the current controls? > This is definitely beyond my expertise but my perception of the > comparison between digital and analog is something like this. > With digital, the signals do not deteriorate until they just don't > work anymore. There is no adjustment necessary (or even possible). > With analog, as the individual components deteriorate the signals > need to be adjusted. Sometimes, this gets to be quite frequent and/or > involved. > Therefore, the initial cost be equal, the maintenance and repair > of digital is cheaper and easier than analog. > What about pressure/temperature transducers? Would a resolver > board also be able to connect to these and allow the use of their > feedback? Maybe with another pin selection? > thanks > Stuart >
Resolvers have a number of advantages over optical encoders: Reads Absolute position (Possibly eliminating the need for Hall effect sensors) Much more rugged mechanically Wider temperature range (limited only by wire insulation) Longer lifespan (no LEDs to dim-out), sensor is completely passive With the advent of single chip resolver to digital converters, most of the analog problems go away. Remember that the optical encoder is analog inside... > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination. ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
