In that case a switch signalling clear or midpoint would be the best option. If you even wanted to do speed things up a tad. John
> -----Original Message----- > From: r...@superiorroll.com [mailto:r...@superiorroll.com] > Sent: November-10-15 7:13 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Tool changer finally working on our mill project > > > Proportionally controlled hydraulic motor, with hard stops and limit > switches at each stopping point of its travels. It takes about 2.5 seconds to > make the 180 degree rotation. That is about as fast as I can get it to go, > without having the tool shaking/rocking too badly when it stops to be > exchanged or put away. > > > Rick > > -------- Original Message -------- > Subject: Re: [Emc-users] Tool changer finally working on our mill project > From: "John Dammeyer" <jo...@autoartisans.com> > Date: Tue, November 10, 2015 9:33 pm > To: "'Enhanced Machine Controller (EMC)'" <emc- > us...@lists.sourceforge.net> > > I guess that depends on how fast it rotates and how the tool is gripped. It > also depends on whether the rotation is a DC motor with end stop switches > or > a servo with position reporting. No point in moving and decelerating to a > stop, telling the unit to extend and then accelerating back up to the > rotation speed. > If it is DC motor based a switch half way around would serve as the > extend/retract begin indication. > On the way to the spindle the switch triggers the extend. On the way from > the spindle the switch triggers the retract. > Only when ready to store the tool does it extend again as it does now. > John > > > > -----Original Message----- > > From: Dave Cole [mailto:linuxcncro...@gmail.com] > > Sent: November-10-15 1:55 PM > > To: emc-users@lists.sourceforge.net > > Subject: Re: [Emc-users] Tool changer finally working on our mill project > > > > > > If you rotate it with it extended it will have a lot more inertia, tend > > to throw the tool, and be harder on the rotator. > > > > If it was rotated with the tool retracted originally, there is likely a > > good reason why they did that. > > > > Dave > > > > On 11/10/2015 4:36 PM, r...@superiorroll.com wrote: > > > When I was writing the ladder logic I followed the original sequence of > > events, but this does make sense, guess I've got some tweaking to do. > > > > > > Thanks > > > > > > Rick > > > > > > -------- Original Message -------- > > > Subject: Re: [Emc-users] Tool changer finally working on our mill > project > > > From: "Pete Matos" <petefro...@gmail.com> > > > Date: Tue, November 10, 2015 3:39 pm > > > To: "Enhanced Machine Controller (EMC)" <emc- > > us...@lists.sourceforge.net> > > > > > > John I wondered the same thing but chalked it up to clearing the > housing > > > of the carousel...altho it does appear to have room. > > > > > > Pete > > > > > > > > > On Tue, Nov 10, 2015 at 3:22 PM, John Dammeyer > > <jo...@autoartisans.com> > > > wrote: > > > > > >> Hi, > > >> Any reason why you won't push the tool holder outwards once it clears > > the > > >> carousel so that when it arrives under the spindle it's already fully > > >> extended? Would save time on tool changes. > > >> Very nice though. > > >> John > > >> > > >>> -----Original Message----- > > >>> From: Pete Matos [mailto:petefro...@gmail.com] > > >>> Sent: November-10-15 10:00 AM > > >>> To: Enhanced Machine Controller (EMC) > > >>> Subject: Re: [Emc-users] Tool changer finally working on our mill > project > > >>> > > >>> > > >>> Very nice Rick....color me jealous!! > > >>> > > >>> Pete > > >>> > > >>> On Tue, Nov 10, 2015 at 12:37 PM, Rick Lair <r...@superiorroll.com> > > >> wrote: > > >>>> Here it is, after putting all the pieces together, and working the > bugs > > >>>> out, I finally got the tool change working using Andy Pugh's carousel > > >>>> component to control the tool carousel, and a pretty healthy chunk of > > >>>> ladder logic to control everything else. All using Linuxcnc 2.7. > > >>>> > > >>>> Thanks for the help guys,,, > > >>>> > > >>>> https://youtu.be/HwXmZDTMeCA > > >>>> > > >>>> More video's to come > > >>>> > > >>>> > > >>>> -- > > >>>> > > >>>> Thanks > > >>>> > > >>>> > > >>>> Rick Lair > > >>>> Superior Roll & Turning LLC > > >>>> 399 East Center Street > > >>>> Petersburg MI, 49270 > > >>>> PH: 734-279-1831 > > >>>> FAX: 734-279-1166 > > >>>> www.superiorroll.com > > >>>> > > >>>> > > >>>> > > >>>> > > >> > ---------------------------------------------------------------------------- > > >> -- > > >>>> _______________________________________________ > > >>>> Emc-users mailing list > > >>>> Emc-users@lists.sourceforge.net > > >>>> https://lists.sourceforge.net/lists/listinfo/emc-users > > >>>> > > >>> > > >>> > > >>> -- > > >>> Pete Matos > > >>> A and N Precision and Fabrication > > >>> Maryville, Tennessee > > >>> 865-236-8996 > > >>> > > >> > ---------------------------------------------------------------------------- > > >> -- > > >>> _______________________________________________ > > >>> Emc-users mailing list > > >>> Emc-users@lists.sourceforge.net > > >>> 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 > > >> > > > > > > > > > > > ---------------------------------------------------------------------------- > -- > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > 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 > > > ---------------------------------------------------------------------------- -- > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > 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
