On 30 March 2017 at 20:38, John Kasunich <jmkasun...@fastmail.fm> wrote: > Put two t-nuts in the center t-slot, bolt one cylinder down using one of the > nuts in a arbitrary location. Set the part over the cylinder, insert the > second cylinder and slide them apart until the two cylinders are touching the > inside of your big bore at the left and right sides. Tighten down the second > cylinder. Carefully lift the part up and off. > The gap between the cylinders is centered on the big bore. Use the coaxial > indicator (spindle off, rotate manually) to center the spindle in the gap. > Lock X. Replace part, indicate base perpendicular to spindle, clamp down.
Thanks, that does seem like it should work, yes. And saves me trying to find a big lump of material. Another idea just came to mind too. I have a three-jaw chuck that bolts down to the mill table. I could perhaps indicate to a rod held in that, then expand the jaws into the bore of the part. I would need to check how true it runs, of course, it might well have ended up in my possession for a good reason. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1916 ------------------------------------------------------------------------------ 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
