On Monday 26 October 2020 11:27:20 Alan Condit wrote: > Hi all, > > I am trying to wrap my head around limit switches for my Grizzly G4000 > lathe that I have converted to CNC. > > The X limit switches are not a major problem. They always goes to the > same spot. I have the X+ switch mounted. Figuring out where to mount > the X- switch so it doesn’t interfere with anything else is a little > tricky. > > I am having trouble figuring out the placement of the Z limit switch > or switches. I can mount the Z+ limit switch on an adjustable mount on > the ways down by the tailstock or even on the tailstock itself. But > having a limit switch that is moveable seems problematic for > configuration. The Z- limit switch could be attached to a moveable > mount on the ways down by the head but it seems that it might be > desirable to have the limit set to keep the cross-feed from running > into whatever chuck is mounted. I have a 3” 4-jaw, a 4” 3-jaw, a 5” > 3-jaw and a 5” 4-jaw. So I might need a different config for every > chuck. What do you guys think.
I have the x switch on the front of the apron. with its roller reaching up so the crossfeed backs into it at the front, a long ways from center. I found a bolt hole in the bed about a foot away from the chuck, and have another identical switch mounted there which gets dinged by the gib strip which is full length of the carriage H pattern so the switch also tells the homeing function which way to the switch. Just to make sure there is work clearance, I remove the tool from the QCTP before homing. But if it hits, the steppers are now 3 phase stepper/servos, and Z will trip off before wrecking the tool. The rest is just .ini file vars. HTH, Alan > > _______________________________________________ > 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
