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
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
A mathematician is a device for turning coffee into theorems.
-- P. Erdos
A pen in the hand of this president is far more
dangerous than 200 million guns in the hands of
law-abiding citizens.
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