On Friday 24 February 2017 07:34:16 Ron Bean wrote: > >What I'd like is a 0.1, 0.2, 0.5, 1.0, 2.0, 5.0 etc gain sequence, > >extended another decade both directions. > > I like this idea a lot, I've been thinking along similar lines. I > don't understand why every CNC controller uses 10x increments.
To control a mux16 I need a nibble sized 4 lines. Aha! See man 9 multiswitch and set it for 4 bits wide. That will give the 4 bits needed to drive a mux16, and the mux16 will have the 1,2.5 value sequence set at its inputs. Inputs can be setp'd, but I'd druther setp one master value, and scale all the other mux16 inputs from that. Set it once per axis in the .ini file. Now, can I put this outside the servo-thread loop, so all this is done once only at LCNC launch time? Given the limited resources of the pi, I would much druther it was kept out of the servo loop execution every millisecond and done only at init time. How can I do that? Hmmm, would need a sign bit too for both directions... In which case mul the reference by -1.000 and reapply to the mux16. Perhaps a new mpg-thread, running at 10 milliseconds for this stuff? What do you guru's think? Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
