On Wednesday 09 May 2018 00:34:47 Jon Elson wrote: > On 05/08/2018 10:04 PM, Gene Heskett wrote: > > On Tuesday 08 May 2018 22:19:25 Jon Elson wrote: > >> On 05/08/2018 06:57 PM, John Dammeyer wrote: > >>> I had a brake disk surface ground so it can be laid on the mill > >>> table and a dial indicator swept around without jamming into the > >>> T-Slots. For the work I've done to date it's been adequate. It > >>> fits on my surface plate so I could scrape it even flatter and > >>> maybe someday it will move up to project #42. > >> > >> I have a program that generates a full circular arc, and > >> then goes to the center of the arc. > >> So, I can mill a path around the circle, then swap the end > >> mill for a dial test indicator, and sweep the > >> circle. So, I can tram the head to the actual X-Y plane of > >> motion, not just the surface of the table. > >> And, in fact, due to wear, I get a little bit of a saddle > >> shape there. But, you can set the tram to > >> get the best average of the X-X and Y-Y deviations. > >> > >> Jon > > > > And that, Jon, is the best idea yet. I assume you can adjust the > > diameter so as to re-use the milled plate again for the next time? > > Yes, either change diameter or just cut the ring a little > deeper each time. > > Jon > So for that, I'd need a plate 5.4719" wide in the y direction. (the cnc kit costs some range of motion in the Y from the advertised travel as I've added a bellows cover over the front of the base to keep swarf off the screw, and the fixed anchor for the bellows stops the table from coming forward) Thats been a rather inconvenient limit, but it beats having a huge open hole in the top of the base for swarf to fall into and directly on the Y screw when its table is moved to the rear.
I have some 1/2" 7075t6 panel yet from scrapping out a pair of Ampex VR-1200 2" vtr's. May have holes here and there already, but would be good for such as this. Or I could get a 6x6x1/2" piece from an online peddler. That would work but would need to be marked so the holddown clamps were applied the same way everytime. Twould be sorta stupid to assume its flat after they sheer off what I ordered. I'll look around and see whats available. > ---------------------------------------------------------------------- >-------- 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
