On Thursday 31 July 2014 08:22:34 John Thornton did opine And Gene did reply: > I think your focused on the word "calculated" and stop comprehending > the rest of the sentence. So let me try and word what G10 L2 and G10 > L20 do in a different way. > > G10 L2 P1 Z-1.5 sets the offset of G54 Z to -1.5, (which is #5223) > > G10 L20 P1 Z0 calculates the value needed to make the current location > of G54 Z0
Now, if L20 p2 does that for G55, and L20 P3 does that for G56, its exactly what I want. Because I want to replace, not modify, what is there in the co-ordinate system p3 represents. So it seems I should be in G54 mode when making my measurements intended to update the G55 and G56 co- ordinates, right? But one last question, what co-ord system should I be in when I do it? IOW, it won't be #5023, so perhaps I need to repeat, copying my code so it only effects the top or bottom offsets? > Lets say I jog the Z axis to absolute machine coordinate -1.5 and my > drill bit is just touching the top of the material. I want that point > to be Z0. > > Now if I do G10 L2 P1 Z0 it sets the #5223 offset to 0, probably not > what I wanted. The DRO reads Z-1.5000 because I stored an offset of 0 > in #5223. > > Ok if I do G10 L20 P1 Z0 it calculates that it needs to set the offset > to -1.5 so the G54 coordinate is equal to Z0.0000 and the DRO now reads > 0.0000 for Z. > > To see what your current offset is just look on the DRO tab. > > If you break a drill bit you need to stop running code and start doing > "chicken checks". If I'm not 100% sure I've got an offset correct I jog > that axis to a position that I know what it should be and check the > DRO. Using coordinate systems and offsets can be confusing so take > your time and check, check, check. > > It does seem to me you should be setting the tool table not the > coordinate system but I'm not fully sure of what your trying to do or > what value is in #101. Perhaps a few lines of your G code might help... For z adjustments I thought so too, but I wasn't getting the results I needed. Thinking back from my easy chair here, it may be that I wasn't actually applying the offset? I'll check that as I originally was doing that 18 months ago, with somewhat random results. But now my Z is quite a bit more accurate, so I'll give that another shot too. That z code, yes, but the holefinder code which deals with X&Y locationsis nearly 250 lines, many of them comments so I can decipher what I was doing today, so I'll not blast the list with that. I will do that with the autoz code if I can't make it work right this time. Currently its maybe 75 LOC. But first, snug up my X gibs, & fix the pallet and add a lost recovery stanza file before I even run tholefinder, which is designed to run without any machine motion other than driving it roughly to the center of the contact pipe in the pallet and executing the holfinder from there. Since that diddles everything but z, only tracking it internally, I think executing the "lost" procedure might be a good idea. All of this discussion has given me a better insight into what I am trying to do. Obviously there is more than one way to skin this cat, the beauty of LCNC. Thanks John. > JT > > On 7/31/2014 5:10 AM, Gene Heskett wrote: > > If that is in fact what it does, replacing the current value there, > > then its exactly what I want to do, eg replace any value currently > > stored in G55 and G56's image of Z, as opposed to adding #101 to it. > > Which is what the L2 version seems to be doing. And its costing me > > money in the form of broken tooling at $10 to $20 a mill, and in > > damaged pallets. > > > > If in fact replacement is what it does, and I will check that after I > > have finished a nights sleep, what the heck does it mean by > > "calculated" > > ----------------------------------------------------------------------- > ------- Infragistics Professional > Build stunning WinForms apps today! > Reboot your WinForms applications with our WinForms controls. > Build a bridge from your legacy apps to the future. > http://pubads.g.doubleclick.net/gampad/clk?id=153845071&iu=/4140/ostg.c > lktrk _______________________________________________ > Emc-users mailing list > [email protected] > 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> US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS ------------------------------------------------------------------------------ Infragistics Professional Build stunning WinForms apps today! Reboot your WinForms applications with our WinForms controls. Build a bridge from your legacy apps to the future. http://pubads.g.doubleclick.net/gampad/clk?id=153845071&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
