On Thursday 10 December 2009, Andy Pugh wrote: >2009/12/10 Gene Heskett <gene.hesk...@gmail.com>: >> Given the Tommy bar clamps on the one you showed in the link, a pair of >> small double acting air cylinders and an electric solenoid would be >> ideal. > >Neater still would be an air bearing arrangement. >Tighten the table down hard with belville washers. >When you want to rotate it, apply compressed air to the holes drilled >in the mating face that I forgot to mention earlier so it rotates on a >minimal thickness air-bearing. To clamp, turn off the air.
Now there is original thinking, and IF I can find the right sized washer, certainly doable with my toy table. Drill an 1/8" air hole in the side, and intersect that with another hole that feeds a groove milled in the casting under the table. The right sized washer will be about 3/16 wide, and something over 1" ID. I'm madly digging thru the junk hardware here. :) Just one Q though, wouldn't this also need an oil injector to keep it from rusting since the air is going to have water in it? >In case you doubt that this will work, it was how we clamped the tool >height adjusters on the testing machines I used to design. They were >for knocking balls off of ICs, and pulling out the tiny gold wires >from carrier to die. You were working under moderate magnification and >still could barely see the tool move as the air went on and off, the >clamping force was enough to scrape entire dies off of substrates, but >the sliding force when released was enough to not even mark the >substrate. (the process was release, land, clamp, back off a few >microns) > -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) The NRA is offering FREE Associate memberships to anyone who wants them. <https://www.nrahq.org/nrabonus/accept-membership.asp> There are two ways of disliking art. One is to dislike it. The other is to like it rationally. -- Oscar Wilde ------------------------------------------------------------------------------ Return on Information: Google Enterprise Search pays you back Get the facts. http://p.sf.net/sfu/google-dev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
