the main thing is that it is already on the machine... To replace them with something new would require a total disassemble of the saddle and table.. We will be using the encoders on the servos for position initially - the scales will be more of an experiment... ;)
We just found this... http://www.google.com/patents?id=NqpNAAAAEBAJ&printsec=drawing&zoom=4#v=onepage&q&f=false Gives a better block diagram... (it is a patent to add temp comp to the circuit...) sam On 4/16/2010 12:50 PM, Jon Elson wrote: > Andy Pugh wrote: > >> However, I think just applying a 250Hz square wave and an oscilloscope >> should at least tell you what comes out of the terminals and then you >> can figure it out from there. A $15 Arduino with a power OP amp can >> produce the excitation, sample the output, time it to 62nS resolution >> and convert it to encoder-style pulses. >> >> >> > The drive excitation has to be VERY carefully balanced, as the output > signal is MUCH smaller than the drive. > Other than that, yes, you could probably build a modern circuit with > good micro or FPGA to do all the counting, etc. > Not completely sure it is worth it. > > Jon > > ------------------------------------------------------------------------------ > 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 > > ------------------------------------------------------------------------------ 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
