On Tuesday 16 June 2015 18:51:44 George Ramsower wrote: > On 6/16/2015 5:11 PM, Gene Heskett wrote: > >> That's all I really wanted to > >> do anyway! I'll end up with labels and tags on several things > >> around here. Then I can get back to building parts for my next > >> steam engine. > >> > >> George R > > > > while I have your attention, the hobby shops sell brass tubeing that > > each size telescopes in the next size or or down. For a piece thats > > 3/8" OD, what is the bore size? I need to shim a couple of lovejoys > > that are 3/8" bore, down to 8mm to fit some big honky nema 23's. > > Do-able? > > I measured K D tubing wall thickness at .0015. I checked three > different sized tubes and got the same reading. > If you require more than one tube, then consider the clearance they > each provide and you may decide this would not be a good choice. When > you tighten the set screw, it will move that part away from center the > sum of clearance of each part used. When I've done this, if the > outside part really needs to be centered, I go ahead and machine an > adapter sleeve with a hole/s for the set screw. > On my micro-mill, I had to adapt the stepper shaft to the lead > screw. I machined the parts to do that on all three leads screws. > I would assume the coupling from the motor to the lead screw is done > with a coupler that allows for some movement in alignment. Perhaps > this type of coupling can deal with one side being off center? > George R > I wouldn't count on this style tolerating more than .010" out of alignment, the red/orange elastomer spider is pretty solidly set. I was hoping for something in the .030" wall thickness, where one layer, slit up the side so it can also compress without butting edges, would about do it since I need an almost even 60 thou of padding, froom .375, down to .315. But this sounds like I may as well machine them. Sigh....
The other one for the z axis, thats 1/2" now, can be bored to 14mm pretty easily, maybe without finding the binding screw, but if I take it out, and do find the hole, well, the motor shaft has 2 "D" flats on it at 90 degree angles that the screw could pass them by & even use it for slippage control until I notice it & snug it up another 1/4 turn. So that one I am not worried about too much. I'm a great believer in red thread locker too. > ---------------------------------------------------------------------- >-------- _______________________________________________ > 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> ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
