Homebrew PCBs

In a message dated 3/4/2007 12:38:27 P.M. Central Standard Time,  
alan00463@... writes:

Has  anybody ever cut, or tried to cut, a PCB in the form of a circle? If so, 
 how?<<
Use a plywood fixture on a bandsaw.  Or, if you are very  skilled, make a 
fixture for your router, using a CARBIDE-edged bit!
 
Or, if you are a lathe operator, first draw the circle with a  Sharpie pen on 
a sheet of FR-4 (or whatever), then manually bandsaw "outside" of  the marked 
circle (leaving 1.5-3 mm waste).  Then fasten the "blank" to a  
plywood-covered face-plate on the lathe with double-stick tape, and fasten a  disk of 
plywood about the dia. of your finished PCB circle over the blank,  holding it in 
place with a live center in the tail-stock, cranked up nice and  hard.  Then, 
TURN the disk to final dim (and sand it!), being VERY  careful.  Don't breathe 
that nasty glass/epoxy  dust!       Jan Rowland



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