On Saturday 23 November 2013 13:21:30 Gene Heskett did opine:
> 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 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
PS: Never mind the 2nd paragraph above, wikipedia to the rescue ;-)
Cheers, Gene
--
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