On Friday 24 August 2018 17:39:50 Les Newell wrote: > I have another issue that I think others have seen as well. Quite > often when I run a program on my router I get a warning that the Z > axis maximum limit will be exceeded. The code runs fine if I ignore > the warning. The warning appears to be triggered by G53 G0Z0 at the > end of the code. My maximum limit is Z1, minimum something like -200. > > Does anyone have any ideas of what is going on? As a workaround is > there any way to tell Axis to never show this warning? > > Les > I think I may not have 100% grokked the z axis homing or tool setup.
Scenario: Z home switch trips about 50 thou below top of post and offsets are supposedly from there in the rest of my homing setup,mainly because I don't care for -z's in my code. But homing does not apply a TLO, which can vary by 7 or 8 inches according to whats in this spindle for a tool at the time with this machine. So when I calculate the min limit, I'm effectively putting the spindle with no tool in it, about 25 thou from the table. With an r8 spindle and er20 TTS holders, or a 5/8" drill chuck and drill, there simply is no way to achieve a consisten TLO measurement without finding the length with a g38.2 and writing that offset into the tool table, valid until the collet is loosened or if the drill is changed. What I have been doing is feeding that offset into the co-ord map, which is not a fixed offset from the g53 g0 x0y0z0 mapping. Since we do have an gcode editable tool.tbl, my present method is wrong, grossly so at times. So the question, since theres no z probition in a G10L1, does a z offset applied that way, actually get into the tool.tbl for use as TLO with a G43 H? Looking at the Doc pdf, it does not say... If so, then how can I save myself from the inevitable fubar by having an invalid flag applied to that H when a tool change is requested, making LCNC spit out an error indicating that the new tool is to be measured before first use. For me that might be a time killer, but I don't see a way around it. Perhaps zero that H, and use it for an error flag? That of course won't work if the g53 and the coord in use are not synched. So I'm open to suggestions on how to proceed. My table has enough scars now. > ---------------------------------------------------------------------- >-------- Check out the vibrant tech community on one of the world's > most engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > 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> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
