Homebrew PCBs

Hi Alan,
        I see that!  I use the heads of 2-56 bolts to hold
my boards down. The ones I buy are cuped foil side up. They
are 4" X 6". The bolts go into a piece of 1/4" PVC. I find
holding the board by the edge-the best method so far. Since
all my boards are 4" X 6" I only have to take two bolts out
and the board slides out the end. The bolts pull the board
down flat. When I do smaller boards, I have other rows of
taped holes in the PVC. The Tit4Tat board was 1/2 of the
4" X 6" board. I would make two at once. I used to make 4
1 axis boards out of one 4" X 6". Tape is fine for doing
a flat pcb, but most surplus boards come warped. 
         How would I fix a warped board when making a double
sided board? Simple, use one or two bolts in the middle of the blank. 
They then become mounting holes.


                                      John     





--- In Homebrew_PCBs@y..., Alan Marconett KM6VV <KM6VV@a...> wrote:
> Hi Listies, 
> 
> Some activity on the CCED list about LPKF and holding PCB's down to 
mill
> them.  Anyone here have the LPKF system?
> 
> 	http://www.lpkfusa.com/products/product/rapidpcbpro/index.htm
> 
> I'd like to get a closer view of the Z height "tracking donut" on 
this
> machine.  And, I'm in the process of downloading a demo of their
> program.
> 
> Alan  KM6VV
> P.S. I'm also looking at a low-cost Gerber to Gcode translation 
program
> that should be available soon!  More details when past beta.