Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

--- On Wed, 13/2/13, Rick Sparber <rgsparber@...> wrote:

From: Rick Sparber <rgsparber@...>
Subject: RE: [Homebrew_PCBs] Re: circuit board drilling question
To: Homebrew_PCBs@yahoogroups.com
Date: Wednesday, 13 February, 2013, 13:11
















 









>Harvey,



>The problem I have with my present arrangement is parallax. I have the >end of my drill about 0.01" above the board and I am able to sight down at about

>a 45° angle.



>I also need to be able to see a few inches around the hole at the same time

>so I can move to the next hole.



>Rick



Hello Rick,
A posible solution;-
Make a jig for your drill to mount under the board surface(a pedal with a linkage to raise the drill).
Use a dot or cross laser mounted on a Lab stand "foot plate" and goose-neck above the drilling area.
Drill a test hole on a spare piece of board and aliagn the laser.
A permanant Drilling Base could be made from a piece of flat aluminuim sheet with a 5mm hole in the centre of the drilling area, mounting the Lab stand on the sheet.
Adding a cheap USB microscope connected to a "cheapie" PC and Flat LCD monitor using the Lab stand would help with any member with fading eyesight.
I intend to construct this rig soon (busy moving at the moment and as such, all my Kit is in boxes....AAAAGGGHHH)
A soon as I can, I will post construction diagrams and pics.
chester















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