I've used the AS5048B in a robotics application. Note that the magnet must have a transverse magnetic orientation rather than the axial orientation of most rare earth magnets.
> -----Original Message----- > From: Mark Johnsen [mailto:m...@ijohnsen.com] > Sent: Thursday, January 21, 2016 7:34 PM > To: emc-users@lists.sourceforge.net > Subject: [Emc-users] using an absolute encoder > > http://ams.com/eng/Products/Position-Sensors/Magnetic-Rotary-Position- > Sensors/AS5040 > > You can buy demo boards from digikey and I think they have versions up to > 14bit (?). 12 bit for sure. Also, they have ABI output (channel a, channel b, > and index) as well as pwm and ssi. Hmm, ABI wouldn't work so well for > absolute position, but the other outputs would. > > I think renishaw makes 'finished' versions of these. > > I ran across CUI, Inc on digikey and they have low cost capacitive encoders. > Think mititoyu caliper. > http://www.cui.com/product/components/encoders/absolute/modular/amt2 > 0-v-kit > > This one is spi: > http://www.digikey.com/product-search/en/sensors- > transducers/encoders/1966131?k=AMT20 > > Good luck. > Mark > > From: andy pugh <bodge...@gmail.com> > > Subject: Re: [Emc-users] [Emc-developers] using an absolute encoder > > To: "Enhanced Machine Controller (EMC)" > > <emc-users@lists.sourceforge.net> > > Message-ID: > > < > > CAN1+YZWVQ+O44DzmnWZhsfYdRG9+8o8reSHk-oKz7WSU1DBF- > q...@mail.gmail.com> > > Content-Type: text/plain; charset=UTF-8 > > > > On 21 January 2016 at 23:23, Stuart Stevenson <stus...@gmail.com> wrote: > > > > > I think a resolver would be the way to go. > > > > Possibly not enough resolution for a rotary table. > > Something like the Heidenhain angle encoders might be better, they > > turn up on eBay occasionally. > > http://bicep.caltech.edu/~yuki/servo/208_736-27.pdf > > > > However the absolute ones appear to use EnDat, and I don't know if > > there is any LinuxCNC support for that. > > > > Renishaw have some that use SSI (Or BiSS, I have forgotten which, but > > something there is a Mesa driver for). > > > > If you could find a head for this... > > > > http://www.ebay.co.uk/itm/Renishaw-RESR-20um-Rotary-Optical-Angle- > Enco > > der-Ring-52mm-8192-Line-Count- > /161850920680?hash=item25af110ee8:g:gtcA > > AOSwT5tWGQ8E > > > > > > -- > ---------------------------------------------------------------------------- -- > 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=267308311&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=267308311&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
