On Apr 9, 2019, at 10:26 PM, Gene Heskett <ghesk...@shentel.net> wrote: > > On Tuesday 09 April 2019 23:02:46 Thaddeus Waldner wrote: > >> Assuming you unplug the rotary axis when you remove it, you could >> simply use a normally closed homing switch that unplugs with the axis. >> Problem with this is it wouldn’t let you use the fast approach, slow >> home sequence with a single switch. >> >> Thaddeus Waldner >> Newdale School >> Elkton, SD 57026 >> >> ________________________________ >> From: andy pugh <bodge...@gmail.com> >> Sent: Tuesday, April 9, 2019 9:34 PM >> To: Enhanced Machine Controller (EMC) >> Subject: Re: [Emc-users] Leaving an axis out of the home sequence AND >> (continued:) >> >> On Wed, 10 Apr 2019 at 02:33, Gene Heskett <ghesk...@shentel.net> > wrote: >>> out of the logic that determines whether the machine will run gcode >>> when that A axis has not been homed because its unplugged, off the >>> machine and stored and either is unhomed, or was never homed since >>> this power up. >> >> The simplest is probably to set it for immediate homing (home search >> velocity zero) but have it in the homing sequence. >> >> If you want it to physically home when present, but not home when >> absent, automatically, then it's harder. I imagine that some HAL logic >> to detect presence or absence and a mux2 to switch between real and >> simulated home (wcomp looking at apparent position of the stepgen?) >> > unplugging it isn't practical without adding a plug in the switch cable, > but some timers could simulate that, and a mux2 to steer the timers or > the switch could work. I'll have see if I can set something up along > those lines. > > More ideas. Thanks Thaddeus. >
Another idea: Instead of simulating a home switch with a timer, you could use an actual home switch from a different axis (eg. z-axis). >> -- >> atp >> "A motorcycle is a bicycle with a pandemonium attachment and is >> designed for the especial use of mechanical geniuses, daredevils and >> lunatics." >> — George Fitch, Atlanta Constitution Newspaper, 1916 >> >> >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net <mailto:Emc-users@lists.sourceforge.net> >> https://lists.sourceforge.net/lists/listinfo/emc-users >> <https://lists.sourceforge.net/lists/listinfo/emc-users> >> >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net <mailto:Emc-users@lists.sourceforge.net> >> https://lists.sourceforge.net/lists/listinfo/emc-users >> <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) > Genes Web page <http://geneslinuxbox.net:6309/gene > <http://geneslinuxbox.net:6309/gene>> > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net <mailto:Emc-users@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/emc-users > <https://lists.sourceforge.net/lists/listinfo/emc-users> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users