On Monday 29 January 2018 00:33:03 Greg Bernard wrote: > Good description, Gene. Have you ever considered makin' one of them > new-fangled u-tube videos of your adventures? > Yes, but then I think better of it. My place doesn't have the real- estate Kieth Rucker or Joe Pi has, its more like a midden heap than a shop and I'm not the cleanest worker. Right now the floor has had about a kilobucks worth of mahogany I've been walking on for nearly 2 years, seasoning so the when I do start cutting the lids for some blanket chests I've promised the boys, and when I get this working, I'll throw a tarp over it to keep the sawdust at bay, while I finish 3 more of those. I have the rest of the parts cut, doing much of that wood machining on the G0704 milling machine and have one 80% assembled, but the mahogany I had was so warped and was kiln dried. So the lignin was set and could not be pulled straight again. I raised a bit of hell where I bought it by taking the first lid into their showroom and let it rock on two corners while the 4th one had 4" of air under it. Yeah, warped that bad.
They finally found me some that while it was kiln dried, was at least flat, then the son of the owner wanted to charge me for it again. Needless to say that got fixed too. Come warmer weather where I can load up my trash trailer, I'll lighten the garage floor about 1500 lbs to make room for the furniture and get that done. Then, the missus might die (COPD), but I hope not, leaving me free to head west of the Missouri and deliver them. But I can't do that as long as I have to care for her. She fell and broke a hip just 2 weeks shy of a year ago, and of course that was fixed, but she hasn't the wind to do the rehab stuff needed to get going again. So I'm doing the cooking etc in between all this. That, and my camera isn't up to you tubes hidef sharpness, so thats reason 2. But thanks for the flowers, Greg, they are appreciated. > On Sun, Jan 28, 2018 at 10:49 PM, Gene Heskett <ghesk...@shentel.net> wrote: > > On Sunday 28 January 2018 12:39:48 Jon Elson wrote: > > > On 01/28/2018 01:36 AM, Marcus Bowman wrote: > > > > I have a TOS 4 jaw self-centring chuck for my mill (lives on a > > > > plate, and faces upwards, for use holding cylindrical stock > > > > facing upwards. That's Polish, > > > > > > Actually, TOS is Czech, but supposed to be VERY good stuff. > > > Their high-end chucks go for several thousand $. > > > > > > Jon > > > > I have come to the conclusion, after taking this chuck apart, that > > its possible it is a Bison, but well aged, made before they started > > inlaying a brass logo disk in the face. Its a 6.25" chuck. > > > > The grease in it was much like cold crayons for consistency unless > > there was a big gob of it that apparently settled to the bottom over > > several decades without motion. Had a heck of a time getting the > > scroll disk out as it fit so tight it bound in the hole if tilted 10 > > thou. Had to put a bar of poly in thru the jaw slots, and drive it > > out 10 thou at a time with a small hammer. > > > > Turning the striped body over, I noted the serial number, 4670, was > > splashed up 3 or 4 thou around the numbers, I knocked them down with > > a smiths diamond plate, then cleaned the mill table and put it face > > down on the mill. Lowered my CBN cup wheel down to pinch a sheet of > > 20 lb under it, wrote a quick loop to drive it in a circle, dropping > > .0001" for each pass around the circle. Then realized that the head > > likely wasn't perfectly trammed, so I dropped a plug in the bore > > hole so it could only move a quarter inch, then restarted the wheel > > and turned it by hand, dropping it .0001" about every full turn. And > > I was right, tram was off so it did all the kissing at about the > > left third of the wheel. Kept that up for about a half hour, until > > the back face was clean all the way around. Some of the bolt holes > > were pulled up around a thou for a 1/4" around them. Washed it out > > clean with paint thinner, using a good bit of a box of Scott towels, > > smeared some lithium based chassis grease into the scroll's resting > > place, and had just as much fun re-seating it. That fit could only > > be achieved useing chalk for the final abrasive, I've done it on > > $8000 camera lenses. Cleaned up the pinions, greased the scrolls > > teeth and the pinions and reinstalled those. Feels like well greased > > fine machinery now. Put the scroll catcher rear center piece back > > in, (I should mention I found one of those 3 bolts about a turn > > loose when I took it apart), and it still turned sweet and smooth. > > > > Cleaned up the jaws and reinserted them. Jaws can move maybe 5 thou > > before running into the scroll, so there's no drag there. Put some > > of that chassis grease in the face of the scroll while I could, then > > ran half a teaspoon of stp into the ball oiler. Smooth and silky. > > > > Looking at the backing plate, wishing I had a thicker one, I'll go > > see TSC about 3 more bolts tomorrow so it will have a bolt in every > > hole. They are spaced evenly, or at 60 degrees, but I'll have to use > > the mill and holefinder routine to find the exact diameter of the > > circle, cutting all the holes 15 thou bigger as I go. This will have > > to be done while its clamped face down so I can use the > > holefinder.ngc to find the x,y=0.00000 center of the bolthole circle > > by referencing the inside edge of the smooth rear spindle hole. And > > find a flat, sacrificial to lay it on letting the holddown clamps do > > the grounding. If I do the math right, it ought to Just Work(TM). > > ;-) > > > > We'll see how my luck holds out, as it will probably be Tuesday > > before I can mount and try to adjust it. At the pace I work, I'll be > > doing good to get all the holes milled to the new size and the bolts > > test fitted tomorrow. > > > > Thanks for reading this far, comment if you like. :) > > -- > > 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 -- 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
