AncientBrit wrote:Just a thought Albert, but could you use a heated wire to melt a hole in the film rather than trying to drill it out?
Heat applied around the middle of the (stainless steel?) wire conducts through to the tip.
You would also need some form of X-Y manipulator to position the 'cutter'.
I suppose you would be left with a small collar of displaced material which would need removing.
Regards,
Graham
I have considered the heating method, Graham, and to mention a terrible pun, "It is on the back burner."
The hot wire could be positioned through a piece of mica to prevent heat loss, the scanning hole images in the film being positioned under my microscope.
But at present I consider that it is easiest to pick up the existing image of the faint scan holes on the very underexposed film images as the datum for making holes right through the film rather than use an XY positioner system. We are dealing with very tight tolerances on holes only .004" dia and where a single NBTV picture pixel is only .004" wide.
I might even try out about a 1/64 " length of the .004 dia stainless steel as a punch when it arrives.