On Thu, 09 Jun 2011 17:30:26 -0000, you wrote:
>Hello Group
>
>I have a quick question about precision drilling of home made PCBs.
>
>Because of poor eyesight, I use a CCD microscope next to my Dremel
>Model 300 drill press stand. Although this set up is a big improvement
>over doing thing solely 'by eye', there is a parallax error introduced
>between the location of the retracted drill tip and where it eventually comes in contact with the PCB. Once I saw a milling machine where one
>was able to sight straight down into a bulls eye. Is there a way to
>rig mirrors to do this?
Drill from the bottom up. Use your CCD microscope to focus on the
hole. Put red tape or the like on the screen to indicate the location
of the hole as you drill with a blank board. That locates the hole on
the screen.
Harvey
>
>P.S. Sincle sided boards are no problem, as I can hold them up to
>strong light and position a hand held rotary tool with good enough
>accuracy.
>
>Any suggestions would be appreciated.
>
>Cheers
>
>Chris
>
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