On Sunday 10 September 2017 16:12:44 Gene Heskett wrote: > On Sunday 10 September 2017 13:08:20 andy pugh wrote: > > On 10 September 2017 at 13:31, Gene Heskett <[email protected]> > > wrote: > > > On Sunday 10 September 2017 07:43:01 andy pugh wrote: > > >> On 10 September 2017 at 04:42, Gene Heskett > > >> <[email protected]> > > > > > > wrote: > > >> And then the X is even stranger, as the screws and locknuts are > > >> at right-angles to the clamping direction, and apparently use a > > >> system of taper wedges. > > > > > > Humm. That almost needs a pix. > > > > https://photos.app.goo.gl/tWKixRru9gpucWa13 > > > > That is with the table slid further left than normal. You can see > > the rear V way and the front flat way. > > You can also see, on the operator side, one of the adjusting screws > > and locknuts, and on the other side the slide-plate and the end of > > whatever the screw/locknut adjusts. But there must be a wedge in > > there, and a little pusher to squeeze the slide-plate down onto the > > table. > > I can see it, but can't visualize it. One of those cases where I'd > have to take a tv camera zoom lens apart to see how it works and goes > back together, and what I need to do to restore its normal operation. > I have at times used an oil/chalk mixture as an abrasive to restore a > fit, after it was jammed into a door frame at the courthouse by a > reporter on the dead run. And that was after I had already put about > $2250 in new stuff in it. I had a long, heart to heart talk with both > the reporter and his dept manager about that. Fuji had to make some of > the crushed stuff, and I got yelled at 2 or 3x a day for the nominally > 10 days that took. > > Back to my problem as I just made some additional measurements. The > 0.0001 dial, sitting on the back flat of the bed, finger on the rear > of the saddle, can lift .0037" before the rear gib stops it! Worse > yet, it only takes a <15 lb push on the bottom of the apron to lift > it, pivoting on the front way so a 20 lb outward push on a tool tip > would do it for sure. Moving the dial finger to the front of the > saddle, and the straight up lift is stopped at about .0017" with at > least 100 lbs of lift under it. This is with the saddle sitting free. > Fixing the rear one will be easier because there is room for some > brute force rigidity stuff, only 3 each, 3/8" bolts holding it to the > bottom of the saddle. I used a bar of 1/2" alu there, knowing it had > some clearance, but my money is that I'll see some wear marks when I > take it off.
And my poor memory. That was what was on it when I slid it out of the cargo van here. Fairly well finished steel, with a very slightly thicker ridge reaching under the bed lip. Looked like the ridge had been created by grinding away that which was under the saddle. Or so they thought. Looked like a well worn surface grinders work, with several hours on the wheel since last dressed. And the last pass was stopped in mid-stroke. And the left end was ground about 10 thou low beyond the bolt. So I cleaned off the mills table and clamped it down, touched off the z at the first hint of a fresh 1/8 mill starting to cut. Drove it to the other end, noting that by the time it had run 2" of that first foot, it was digging at least 9 thou. So I stuffed about .6" of y cut the length of it at 50 thou steps into the mdi buffer followed by an m5. I can finish in the morning. That will make it /way/ too tight but I suspect I'll have to level that last .250" under the bed lip back to needing some of the shim for clearance anyway... > That one I think I will use setscrews for adjusters as > they can be accessed. IIRC the cable chain is attached to the > headstock end bolt of those 3 bolts. A longer bolt is NBD. > Actually I had already done that, using one a 1/4" longer when I had attached the end of the cable chain there. Poor memory? I think I had a ham & 3 egg omelet for breakfast. But don't ask me to swear to it. 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
