I'm very intrigued by these Inductosyns. I assume the several hundred mA drive is an AC waveform. What frequency is used? Obviously an amplifier is needed for the drive side. Do you also need an amp on the sense side? These appear to be two-phase (quadrature). Aren't resolvers generally three-phase?
-- Ralph ________________________________________ From: Jon Elson [el...@pico-systems.com] Sent: Thursday, February 18, 2016 6:23 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Linear / glass Scales On 02/18/2016 01:23 PM, Nicklas Karlsson wrote: > Do you know accuracy of the linear resolvers? > > I guess it would be possible to position an ordinary disc read head quite > accurate. Either one for DVD/CD or magnetic. How many bits are stored per > turn? > > > GE pin scales are fairly low resolution, they work by varying reluctance of a stack of gauge pins passing between excitation and pickup coils. But, you might still get ~33,000 counts/inch, I think. Inductosyns are pretty simple in concept, a plate with two sections of serpentine PCB tracks, with them set up with a 90 degree shift between the two. And, a spar with a continuous serpentine running the whole length. Then, you have to drive several hundred mA through the spar. With a bit of an amplifier, you could get this to work with my (Pico Systems) resolver converter board. If the serpentine repeated every .1", then you'd get 40960 counts/inch. But, that might be too fine a pattern, requiring the two PC boards to be awfully close. Jon ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
