On Sun, 11 Apr 2010, sam sokolik wrote: > Date: Sun, 11 Apr 2010 12:37:22 -0500 > From: sam sokolik <[email protected]> > Reply-To: "Enhanced Machine Controller (EMC)" > <[email protected]> > To: "Enhanced Machine Controller (EMC)" <[email protected]> > Subject: [Emc-users] Old scales - any hope? > > I have started looking at the scales that came with the mill we are > working on - I had figured that the where some version of a linear > resolver... bit it isn't 1 coil in - 2 out for sin/cos. The way I > understand it - the send a 250hz square wave to the outside of each > coil. the 2 centertaps are summed together to get the position. (I > assume the output of the centertap is the reletive postion comparing it > to the input square wave. I was thinking that maybe something like JonE > resolver to quadature converter would work - but I am not sure now... > We could always resorect the old circuits.. :) but I would rather not. > > each of the 4 coils measure 114ohms > > This is the circuit that sent the square wave to the head and summed the > centertaps. > http://electronicsam.com/images/KandT/conversion/accupinscirc.jpg > > this is what the head reads... > http://electronicsam.com/images/KandT/conversion/accupins.JPG > > thanks again > sam >
Sort of looks like a "backwards" resolver, that is it has sine and cos drive signals and a single pickup (well summed pickups). It _might_ be possible to run it backwards with a single drive like a resolver, but I'm not sure, You would probably have to hookup a audio source and a scope to find out. Might also be possible to read it with our resolver interface (7I49) with different firmware. > > > > > > > > ------------------------------------------------------------------------------ > Download Intel® Parallel Studio Eval > Try the new software tools for yourself. Speed compiling, find bugs > proactively, and fine-tune applications for parallel performance. > See why Intel Parallel Studio got high marks during beta. > http://p.sf.net/sfu/intel-sw-dev > _______________________________________________ > 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. ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
