On Wednesday 22 July 2020 02:45:48 John Dammeyer wrote: > > The launch of linuxcnc on the pi is without any motor power until > > the F2 button is pushed. So at launch time I get messages about the > > z drive being tripped. > > > > So I need a 1 or 2 second delay before that bit is sent on thru, but > > instant transmission once timed out, giving the driver a chance to > > get all its stuff in one sock from the powerup enabled by the F2 > > key. I want to block any noise during the powerup surge. > > > > Ideas? Something simpler than a one-shot, and2 + a not, thats less > > time in terms of the addf chain. Timer, driven from F2 I'm stuck > > with, but is a lut5 faster than all the logic needed to "get the > > signal right side up" IDK. > > Hi Gene, > I had similar issues. The soft start on the Servo Power supply > results in the STMBL servo drive faulting out when enabled because DC > power isn't there yet. > > I ended up making a board with a PIC12C509 that is an 8 pin processor. > If I'd had an Arduino I'd probably have used that. I now need a > bigger one anyway since I want to separate the Spindle Enable from the > rest of the Enables. > > But I used external hardware to do the time delays to make sure things > started up the way I wanted. You might also use time delay relays. > But they aren't cheap. Ultimately an Arduino ends up being an easy > solution. > > John Dammeyer
Why should I use any external hardware when LinuxCNC has the stuff built in? All I need to do is add it to the .hal file. > > Thanks. > > > > 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 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
