On Sunday 09 September 2018 00:17:32 Phillip Carter wrote: > On 9/9/18 1:14 pm, Gene Heskett wrote: > > On Saturday 08 September 2018 22:34:06 Phillip Carter wrote: > >> On 9/9/18 5:18 am, Gene Heskett wrote: > >>> Greetings all; > >>> > >>> I am about to give up on this bedwear comp project. > >>> > >>> How I determine the amount of correction needed has been tried by > >>> watching the dial as Z is moved, taking notes as to which way the > >>> center of the wobble (the spindle is running about 15 rpms) moves, > >>> and putting that DRO's RAD in the hal files lincurve "setp" list. > >>> Makes it worse, change sign of lincurve y-val, still worse. Seems > >>> like the correction is being multiplied by 3 or more. > >>> > >>> I have run it to a lincurve X-val-nn point, and using the jog > >>> dial, centered the dials wobble on zero, then put the obtained rad > >>> into a y-val-nn, again making it worse with either sign. > >>> > >>> So how do you folks derive the correction needed? > >>> > >>> I'm assuming the offset itself is in radius, not diameter. In > >>> which case the needed radius correction max's at about 2.5 thou. > >>> And that the sign is the "tricky" part. > >>> > >>> Thanks everybody. > >> > >> This lathe bedwear may be a good candidate for the > >> dgarr/external_offsets branch. > > > > Humm, can't say I've ever heard of that. URL? > > https://github.com/LinuxCNC/linuxcnc/tree/dgarr/external_offsets
Thanks Phill. Quick inspection, looks like Dewey is 86 commits behind even an uptodate 2.7.17, and I'm already playing canary in the coal mine now, running Master on all 4 machines all the time. Its the least I can offer this project, hoping to catch typu and thinko bugs to keep them out of 2.7.18. And due to a lack of time since I'm doing it all here at the coyote.den, including digging up and fixing a broken water line this past week, likely not doing a very good job of testing. I still have aches and pains from that. Part of the reason I'm awake in the not so wee hours. -- 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> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
