Sam did you get any info from that company in Detroit who has the converter boxes? At the time, I thought the cost was reasonable considering it is a tested unit.
Dave On 4/16/2010 2:00 PM, sam sokolik wrote: > 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 >> Emc-users@lists.sourceforge.net >> 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 > Emc-users@lists.sourceforge.net > 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
