Homebrew PCBs

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When I used the photosensitive method, I did the alignment holes the following way:

I used tacks.  So drilling holes in the PCB is the easy part.  Instead of driling holes in the plastic film, I used the tack to punch the holein the artwork.  I may have used aheated drill bit, can't remember.

I did some punches into labeling before and I used a biopsy punch.  Nice and sharp.

From: crazy_geekchick <amiegrl2001@...>
To: Homebrew_PCBs@yahoogroups.com 
Sent: Wednesday, July 31, 2013 5:41 PM
Subject: [Homebrew_PCBs] Re: Has anyone made a diy registration hole punch or add pins to diy exposure kit?
 


  
Drilling holes is a fine idea, but how does that put holes in the artwork to line it all up? That is the part I am worried about. 

Putting pins through the artwork allows them to be lined up precisely front to back. Putting it through the board may standardize that across boards, but it the hole in the board alone wouldn't seem to line up the artwork to me? 

Am I missing something? 


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