I’d try the operations in the opposite order and see what happens…. I’ve seen more subtle things like this before and chocked it up to part flex, but what you’ve got there is too extreme to believe it could be simply flex.
N. Christopher Perry > On Aug 2, 2021, at 1:10 PM, John Dammeyer <jo...@autoartisans.com> wrote: > > Same tool for both inner hole and outer profile. > Same feeds and speeds and conventional, not climb milling. > G40 -- No compensation. > Only I,J in the file with a G17 preceding them. > > I could hide it considering what it's for and that no one will see it. But > that's not really the point. I'd know. > > Will try it again today this time with entry exit for each pass rather than > just the first and last. > > John > >> -----Original Message----- >> From: Ralph Stirling [mailto:ralph.stirl...@wallawalla.edu] >> Sent: August-02-21 8:12 AM >> To: Enhanced Machine Controller (EMC) >> Subject: Re: [Emc-users] Something went wrong. >> >> To elaborate a little more, your description sounds a bit like G42 cutter >> compensation, described in >> https://linuxcnc.org/docs/2.8/html/gcode/tool-compensation.html . >> >> -- Ralph >> >> On Aug 2, 2021 6:12 AM, Ralph Stirling <ralph.stirl...@wallawalla.edu> wrote: >> CAUTION: This email originated from outside the Walla Walla University email >> system. >> >> >> Cutter compensation enabled? >> >> On Aug 1, 2021 7:26 PM, John Dammeyer <jo...@autoartisans.com> wrote: >> CAUTION: This email originated from outside the Walla Walla University email >> system. >> >> >> The milling operation was set up to always be climb milling. Zero point for >> the center hole and the outside perimeter was the same. >> And yet it milled more away on the LH side. >> >> The piece was tightly clamped and did not move. The width of the perimeter >> on the RHS is correct with the outer diameter at 45mm >> and the inner hole at 32.5mm. >> >> ie. At the RHS it's 6.25mm wide and on the LHS it's 4mm so it's the milling >> of the outer that shifted. The inner circle is pretty well >> round. Not as good as a boring tool but still round. >> >> The inner hole was done after the outer perimeter. >> >> Very odd and I don't understand why. LinuxCNC and the motor drives did not >> throw up any faults. >> S1100 >> Feed was 307mm/min with 1/4" 2 flute cutter. >> Total depth was 3.2mm and depth per pass 0.9mm. >> WD-40 and compressed air. >> >> John >> >> >> >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc- >> users&data=04%7C01%7Cralph.stirling%40wallawalla.edu%7C7289f9725ae7402aa09e08d955b729a7%7Cd958f048e43142779c >> 8debfb75e7aa64%7C0%7C1%7C637635067436312233%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiL >> CJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=BqEeOSHMeKIvwcjx14ixRok0Qp2bkvl52bCFZMI3L1k%3D&reserved= >> 0 >> >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users > <RegulatorBracket2.jpg> > <RegulatorBracket3.jpg> > _______________________________________________ > 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
