On Sun, 12 Dec, 2021 at 6:09 AM, me <ghesk...@shentel.net> wrote: To: emc-users@lists.sourceforge.net Greetings all;
I need access to the Z position that is G53 referenced as I need the absolute position on the post assuming the home switch abut 40 thou below the top is at 0.00000. Which hal pin or signal gives me that value? No answer so far, so let me ask a different way since I cannot watch the #5XXX values with a hal meter to identify the var I need. Is joint.N.cmd-pos the stable value I need? Not changing with co-ord mapping or touch-offs, or even metric/imperial measurement switches. I am currently using it for Z pos reference as the pos input to a lincurve module whose output is directed to the X offset module "wired" up in hal to comp bed wear on the Sheldon, and that seems to be working well as it needs about 13 thou of comp right in front of the chuck. It can now turn within a thou, for at least 15" from the chuck. My GO704's post is not quite plumb, the boltholes that attach it to the base aren't big enough to allow it to be pulled plumb, so I either need to ream the holes. or fix it with an offset in the X path, preferably based on a zero point at the home switches closure point. By inserting a tiny bit of Z motion in order to not bend a drill bit against the side of the hole as it descends. This bent drill is quite visible. Ideal situation would having this joint.N.pos,cmd be 0.00000 at the home switch closure. Then I want, not to use a lincurve module, but a scale module with a very small scale setp'd into it to develop a correction offset that might be only 50 thou in the height of the head travel. The head is currently well trammed to the table and a small X movement as Z descends could correct it, drilling and tapping round holes by moving X to make it stay plumbed as Z descends. I have even broken taps with the non plumb sideways push at the bottom of a hole. And obviously sloppy threads result. One more step IOW in my attempts to make a silk purse out of an $1100 sow's ear mill. Thank you. Cheers, Gene _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net<mailto: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
