Homebrew PCBs

----- Original Message ----- 
From: "crankorgan" <john@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Friday, December 09, 2005 1:29 PM
Subject: [Homebrew_PCBs] Mechanical Etching


>     With mechanical etching you can mill and drill. Each bit will mill
> 3 to 4  4" X 6" boards. It is safer for students thats why the schools
> use the machines. Every board is usable. Chemical etching in the hands
> of a beginner is hit or miss. Milling is cheaper and faster in some
> cases. TT is the way to go but it is not working for everybody.

UV exposure and chemical etching is very easy and quick, I've never had any 
problems with it, although it did take a little experimentation to get the 
correct UV exposure time (30  minutes or so). Once that is established it 
works very well, every time.

Leon 

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