On 01/21/2016 04:45 PM, Stuart Stevenson wrote: > Gentlemen, > I desire to use an absolute encoder. > I will work that direction if someone will point me to a good starting > point. > > Do you have a specific model in mind? Some Fanuc encoders have a pseudo-absolute outputs. The absolute position is stored in battery-backed memory, and then a pulse after power up will cause it to send the number of counts from the "home" position to where it was at power-down (including multiple turns).
On the Fanuc serial pulse coders, they store the number of turns and absolute position in battery-backed memory, and output that absolute position data in a 77-bit serial bit stream at 1.024 MB/second. I have the format pretty well mapped out, although I don't use all of that info in my Fanuc converter board. An absolute encoder should work in LinuxCNC without too much trouble. Instead of performing the homing sequence, the machine position comes directly from the encoder, and can't be changed. 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=267308311&iu=/4140 _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
