Here are your 3 points. As a math wiz you can see that if you draw a perpendicular line from each pair of points they all intersect in the middle. The third angle is the one I can create graphically and from that the length for the XY of the center but you might be able to explain the math a bit better.
> -----Original Message----- > From: R C [mailto:cjv...@gmail.com] > Sent: July-11-21 10:31 PM > To: emc-users@lists.sourceforge.net > Subject: Re: [Emc-users] 'automatically' go halfway between 2 points > > > On 7/11/21 11:15 PM, John Dammeyer wrote: > > Essentially the process involves two touch off operations. First one side > > until an LED comes on or even better the probe input goes > active. At that point touch off so the axis is set to 0. > > > > Then you move in the opposite direction until the probe (or LED) goes > > active. Divide that axis value by two and move back to that > position. Now touch off again to set the axis to 0. You are now in the > middle. > > Right,� I can do that with a calculator and some arithmetic, and jog > there manually,� but I am a mathematician,� and we're known to be lazy,� > so I am thinking about a button�� :) > > > > > > It's probably possible with a fancy G-Code macro. > > well,� if one can write a plugin,� it would probably be fairly easy (but > I am a CNC rookie) to do that,� if that plugin can actually move the > tool/spindle > > > > > > A number of different projects I've done have been set up that way. Find > > the center of the object which is also where I've set the > center in the CAM software. Rather than top left or bottom left corner of > something that has been milled away. > > right,� I don't think it is not too difficult to find the center of all > kinds of shapes (geometrically or otherwise), in a math kinda way that is. > > > > > > But I'm an amateur and probably do things the hard way. Often... > well,� hobbyist that's trying to learn some stuff here,� I am actually a > mathematician,� I can calculate things,� but I'd be a starving machinist > or CNC person/operator/machinist ...�� this weekend I created 4 proto > types of a stepper motor mount,� aka scrap. > > > > John > > Ron > > > > > >> -----Original Message----- > >> From: R C [ <mailto:cjv...@gmail.com> mailto:cjv...@gmail.com] > >> Sent: July-11-21 10:00 PM > >> To: <mailto:emc-users@lists.sourceforge.net> > >> emc-users@lists.sourceforge.net > >> Subject: Re: [Emc-users] 'automatically' go halfway between 2 points > >> > >> > >> On 7/11/21 10:47 PM, John Dammeyer wrote: > >>> I still have my Shumatech DRO on my mill. I touch one side and zero the > >>> axis. I then move across and jog until the LED goes on. > >> Then FCN 1 and the axis letter button. At that point the axis changes to > >> minus halfway between where I just touched off and the > >> original 0 point. > >>> I move to make the DRO show 0 and then touch off that axis on the AXIS > >>> screen. Now I have the center point between the two > >> edges. Since the LED indicator probe is 0.2" diameter the distance to the > >> center doesn't matter. Only if I am trying to find the > edge > >> and the Shumatech can be told the diameter of the probe. > >>> Certainly there must be an easy way to do this with LCNC? The Shumatech > >>> software has been around for at least 13 years. > >> > >> Oops,?? I didn't see this last line...?? I think so,??? either some > >> added functionality in the DRO? (that is where I was looking around),? > >> or else a plugin.?? it's probably not that hard,? if I knew how to write > >> a plugin for LCNC > >> > >> > >>> John > >>> > >>> > >>>> -----Original Message----- > >>>> From: R C [ <mailto:cjv...@gmail.com> mailto:cjv...@gmail.com] > >>>> Sent: July-11-21 9:29 PM > >>>> To: linuxcnc-users-list > >>>> Subject: [Emc-users] 'automatically' go halfway between 2 points > >>>> > >>>> Hello, > >>>> > >>>> > >>>> in linuxcnc,? is there an easy/automated way to get halfway between two > >>>> points??? (Fort example, you'd touch off somewhere, move to some > >>>> coordinate (x, y)? (or even (x, y, z)) and go inbetween right to the the > >>>> middle of where you touched off and where the spindle is now? > >>>> > >>>> > >>>> thanks, > >>>> > >>>> > >>>> Ron > >>>> > >>>> > >>>> > >>>> _______________________________________________ > >>>> Emc-users mailing list > >>>> <mailto:Emc-users@lists.sourceforge.net> 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 > >>> <mailto:Emc-users@lists.sourceforge.net> 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 > >> <mailto:Emc-users@lists.sourceforge.net> 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 > > <mailto:Emc-users@lists.sourceforge.net> 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 > <mailto:Emc-users@lists.sourceforge.net> Emc-users@lists.sourceforge.net > <https://lists.sourceforge.net/lists/listinfo/emc-users> > https://lists.sourceforge.net/lists/listinfo/emc-users
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