hey guys yelping out for help again here. sorry to me so noisy on the email list lol.
just coming back to this problem with my spindle direction signals. (just to reiterate my set up I have a mesa 7i76 card and have the anlog input up and working. I am controlling a schiender vfd using 2 wire control at the moment. though I can use 3 wire control if that helps. the enable pin on the 7i76 is currently set to switch the forward rotation on the vfd the direction pin is currently set up for switch the reverse input on the vfd I can speed up and run the spindle fine forwards its just backwards that is a problem) anyway to carry on with the issue So its quite funny what happens. I can start the spindle in forward rotation with m3 s400 then I can stop the spindle manually or with m30. and then start it backwards with m4 s400. then without stopping I can type m3 s500 again and send it forwards. That part all works good. what doesn't work is if I try to send the spindle backwards on the fly. eg m4 s500 while still running forward. The speed changes but the direction doesn't. Its a weird. One fix for this I suppose is I could connect a relay that switches the direction in the vfd between forward and reverse rotation. that is easy but I still don't know if it will work. I suppose I could almost run the enable relay feeding the direction relay so you switch the direction relay between fwd and rev and actually turn on the vfd with enable relay once the direction relay is set the right way. But that sounds like a pretty complicated setup when I know that I am facing a very common problem. So I will await any ideas before mucking around too much.. I will add a photo of what I am thinking and reply here from my phone. regards Andrew On Tue, Mar 17, 2020 at 2:12 PM Gene Heskett <[email protected]> wrote: > On Monday 16 March 2020 19:28:59 andrew beck wrote: > > > ok gene just a update > > > > I have the mesa card connected to the vfd now. > > > > currently the analog signal is working fine I can it being read by the > > vfd which is good. > > > > I am having trouble with the control signals though. > > > > I currently have the 7i76 spindle enable pin switching the forward pin > > on the vfd > > the spindle direction pin on 7i76 switches reverse pin on vfd > > > > I am a bit stuck with what I need to do to connect up the hal > > signals.. any help there would be appreciated. and let me know what > > info you need from me. > > > > regards > > > > Andrew > > > > On Mon, Mar 16, 2020 at 7:02 PM andrew beck <[email protected]> > > > > wrote: > > > I have a schiender vfd made in France so a proper manual lol. > > > > > > It's just the Mesa card I'm not sure about lol > > > > > > On Mon, Mar 16, 2020, 9:10 PM Gene Heskett <[email protected]> > wrote: > > >> On Monday 16 March 2020 00:28:43 andrew beck wrote: > > >> > Hey guys.. > > >> > > > >> > this has probably been rehashed a few times but did some google > > >> > searches and couldn't find it so am asking here > > >> > > > >> > I just want to connect my mesa 7i76 spindle outputs to my vfd. > > >> > > > >> > I will use 0-10 volts control speed reference and a forward pulse > > >> > and reverse pulse. > > >> > > > >> > I am not sure what actual pins I should be using though and am > > >> > slightly confused. > > >> > > > >> > any help would be appreciated > > >> > > >> There are pins designated for that on the 7i76D, what seems to > > >> confuse folks is that the spindle speed is an electronic resistor > > >> that acts exectly like the arm of the front panel speed pot on the > > >> vfd, but the vfd must be programmed to use it that way. Print the > > >> 7i76 manual and reread it, it is explained. > > >> > > >> Less clearly done is the explanation in the vfd manual as most are > > >> chinglish or engrish translations that are only half-assedly done. > > >> Sometimes they switch halves in mid sentence too, just to make it > > >> interesting :-[ > > >> > > >> > regards > > >> > > Get the Sheldon package from my web site, my vfd is being fed from pwmgen > 0, follow that to where the pwm feeds a spinx1, bypass that, and feed > the pwmgen to the spindle-speed on the 7i76. I'll also attach the hal > file for my G0704, but it doesn't have a vfd as its useing a pico > pwm-servo to run its pmdc motor. But between those 2 files, that should > show you how the analog signal gets from point A to point B on a 7i76. > > If not, yelp again. > > Take care, avoid this virus if you can. > > >> > Andrew > > >> > > > >> > _______________________________________________ > > >> > Emc-users mailing list > > >> > [email protected] > > >> > https://lists.sourceforge.net/lists/listinfo/emc-users > > >> > > >> 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 > > >> [email protected] > > >> https://lists.sourceforge.net/lists/listinfo/emc-users > > > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > 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 > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
