On Friday 25 December 2020 06:00:11 Gene Heskett wrote: > On Friday 25 December 2020 04:57:53 andy pugh wrote: > > On Fri, 25 Dec 2020 at 09:32, Gene Heskett <ghesk...@shentel.net> > > wrote: > > > Thoughts? Any reason to addf it to any faster a thread than 2x a > > > second? > > > > hy_vfd is a user-space component, so doesn't get added to any > > thread. > > Does its "pins" show up as usable by hal? > > > I do occasionally consider working on a modbus layer for the Mesa > > uarts, to get true realtime control, but it has never got near to > > the top of my list. > > Which is one of the reasons I'm still putzing with register settings. > I'm running it, but only fwd at an LCNC set speed ATM. rev is being > ignored. Looking at the block diagram on page 12, there is no voltage > on the fwd-rev terminal when the spindle is off. There was with the > old 110 volt vfd, opens at the 7i76 had +10 volts on them and sensed > the ground to enable fwd or rev. So I'm still reading thru the > exceedingly fine print for a clue as to why there is not a voltage > there so the ground from the 7i76D can be sensed. Either a wrong > setting someplace, or I have a defective vfd. Needs additional > investigation but its 2 to 3 steps up a stepladder and my back's > crushed discs limits the time I can stand and balance there to 2 or so > minutes at a time. But that's my problem, not yours ;-) When I do find > it, I'll mark it down in the back of the booklet. > > Thanks Andy.
Got it, finally, my own stupidity, I measured and found a couple volts of AC on those terminals from an internal scan, and then I grokked that it was to interpret the FWD terminal as a "RUN" command, which is now set at pd044=01. Then the next terminal, REV was to be seen as a reverse or pd045=03, and now those controls work as expected from axis as long as pd023=1, enabling the reverse. So I won't need the hy_vfd after all. Next is to see if I can get a useable signal from the VO terminal, one I can feed a near module for a spindle-at-speed signal. And maybe even a SWAG to drive the tach with. But to do that right, needs a much lower max range of the A2D's for an 7i76D input, 36.2 volts for a full scale reading of 255 is way too high. zero to 5 volts would be much more useful. But its a step in the right direction, just not as accurate as I'd like. That if scaled, would be 95 rpm per bit change at the very best. But first, I have to figure out how to enable the A2D's on the first 4 inputs. Onward and upward, and a very Merry Christmas all. > Cheers, Gene Heskett 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) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
