> > That was actually what I was looking for, a button "like that", and > wondered if I just didn't see/find it. > > Yeah I can see some "convenient" functionality in that, but being able > to go "half way" between two points, even with some iteration would > help, to get that started > > (It would be really easy, math wise, once you have something like that, > to find the center of a circular hole, or a rectangle, or anything > symmetrical, basically) > > I wonder, in hal, with a plugin, if you can just move the tool/spindle, > and the DRO screen shows where it is going. For example, for finding > the center of a circular hole, you'd only need to find the edge in 3 > spots, and then just "go there". > > > I'd love to figure out how to write a plugin like that. >
Well If you want to use an electronic probe tool to automatically stop at contact I think the use of HAL is unavoidable since the probe input is a part of the MOTION component of LinuxCNC. You'll also have to make fancy G-CODE as John said with this approach since you're gonna need to deal with digital outputs and delays to make the routine. If you plan to externalize the probing or if you plan to use a wiggle edge finder, you can still use HAL to manually set the points with a button as we talked earlier. As Andy suggests, there are plenty of GUI(ed) ways to do this also, but I'm so comfortable with HAL that I really don't mess around too much at GUI level. (That's a big to do on my list) If you have some C programming knowledge I think you will be more than alright making your custom component to try this. I myself am pretty far from being a programmer and I could do a lot of custom components with the HAL Component Generator <http://linuxcnc.org/docs/2.8/html/hal/comp.html> for the machines I have here. Any help you need please feel free to ask :) El lun, 12 jul 2021 a las 5:20, andy pugh (<bodge...@gmail.com>) escribió: > (Nothing quoted, as this is general info) > > If you have a probe, then there is a hole centre macro that ships with > LinuxCNC, "probe-hole.ngc" > That will work without any config changes. > There is a fairly complete set of probe routines included in the > distribution which are included in the QTDragon and Woodpecker QTVcp > GUIs at least. > (There is a lot going on with QTVcp, it seems, and it is passing me by) > > In the venerable "Axis" interface you can spoof a fair bit of what is > being talked about here in the touch-off dialog as it will accept > mathematical expressions in the box. > So, you can type in the current DRO reading and halve it ( 1.234 / 2 > ). I believe that any valig G-code expression will work: (sin[60] / 2 > for example) > > It would be handy to be able to use axis letters in there, and feels > like an easy thing to add. I would not be at all surprised to find > that some of the newer GUIs allow exactly that. > > This touch-off behaviour will be GUI-specific, and I doubt that anyone > is intimately familiar with more than a couple of GUIs. > > -- > 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, 1912 > > > _______________________________________________ > 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
