On Saturday 23 November 2013 18:52:54 Marcus Bowman did opine: > On 23 Nov 2013, at 18:02, Gene Heskett wrote: > > On Saturday 23 November 2013 12:43:43 Jon Elson did opine: > >> Mark Wendt wrote: > >>> is the camera center concentric or not with the camera body? If it > >>> is concentric, drill and ream the post to the outside dimension of > >>> the camera body. On a mini mill, how long does it take to change a > >>> collet? Probably about the same amount of time it takes to change > >>> out a regular old-fashioned touch-off tool. > >> > >> It is not going to be concentric to within .001" or better, that's > >> for sure! So, an adjustment mechanism needs to be provided. Also, > >> you need to have it fairly straight, so a small difference in Z > >> distance doesn't provide a shift in the crosshairs. But, such a > >> mechanism could be made pretty small. Possibly hollowing out an end > >> mill holder or other taper shank part (or making one from scratch) > >> would allow the adjusting mechanism and part of the camera to fit up > >> in the spindle taper. Maybe you'd have the adjusting screws just be > >> setscrews tapped into the body of the holder. 6 setscrews in two > >> rings > >> of 3, an inch apart might be enough. You'd then have to pull the > >> thing to adjust the screws each time, but you should never have > >> to adjust it again, once it is zeroed in. > >> > >> Jon > > I have an optical machine scope that has that kind of gimbal adjustment, > although it is just two screws which act on a spherical arrangement > inside (I think). Works fine. I have also cobbled together an > adjustable camera mount for a USB camera, but don't use it (prefer my > optical scope). What would be the disadvantage of mounting it > permanently on the side of the head? That way it is always there, and > you only need to calibrate its position relative to the spindle, once. > You could use a work offset. > > Marcus > Precisely what I am in process of. A small block of alu, with a clearance for the spindle rack alignment in one side of it is about 10% made. Had to write some code to carve that pocket, back gave out so I came back to my office chair in here and worked on that till it cut air good enough for the girls I go with. Depending on the weather, snow 50 miles west & bearing down, I might go out and finish that operation. Then drill in the lathe a .520" dia through hole for the camera plus a rear grommet which will be squeezed down pretty snug, drill & tap the 3 alignment screws, and a couple mounting screw holes, go out to TSC and find suitable setscrews & tap the side of the casting for the mounting bolts, something in the 8 to 10-32 range. At the rate I work in cold weather, maybe Tuesday to start alignment tweaking.
> > I can see how that could work if making it, make it a #2 taper without > > slits so it wouldn't crush the camera, but oversized in length so the > > bottom row of screws are accessible for adjusting when its plugged > > into the spindle, and broach a groove for the usb cable exit. I can > > do every thing but the broaching of the cable exit groove. But it is > > still a time waster to change to/from it though, so that would likely > > be my 2nd choice. > > > > I might have to ask what the taper in radius is per inch of a #2, ISTR > > my handbook shows the angle only. If I do it, or perhaps, since they > > are pretty cheap, buy 2 more for another $44 and make one up that > > way, 3rd for a spare so I don't have to reinvent this wheel if it > > fails or gets wrecked from starting the spindle with it mounted. > > > > Cheers, Gene > > ------------------------------------------------------------------------ > ------ Shape the Mobile Experience: Free Subscription > Software experts and developers: Be at the forefront of tech innovation. > Intel(R) Software Adrenaline delivers strategic insight and > game-changing conversations that shape the rapidly evolving mobile > landscape. Sign up now. > http://pubads.g.doubleclick.net/gampad/clk?id=63431311&iu=/4140/ostg.cl > ktrk _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users 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) NOBODY EXPECTS THE SPANISH INQUISITION! A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. ------------------------------------------------------------------------------ Shape the Mobile Experience: Free Subscription Software experts and developers: Be at the forefront of tech innovation. Intel(R) Software Adrenaline delivers strategic insight and game-changing conversations that shape the rapidly evolving mobile landscape. Sign up now. http://pubads.g.doubleclick.net/gampad/clk?id=63431311&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
