Homebrew PCBs

> On 13.Feb.11 20:11, designer_craig wrote:
> > I am about to build a vacuum table to hole down the blank stock when I cnc drill my boards.  I am looking some low cost sacrificial material to use between the board and the vacuum table.
> > 
> > The material needs to be thick enough so as not to drill into the vacuum table and be some what porous to allow air diffusion for a good vacuum grip.
> > 
> > The ideal material would be something like 1/16" thick MDF.  I have heard MDF is fairly porous. I have only seen MDF in 1/2 and 3/4" thickness.  Possilble some sort of construciton paper or cardboard. Guess I need to do some experiments.
> > 


> You should be able to find 1/4" MDF, just mask the unused MDF.
> 

If I understand him correctly he was wanting a backer board to protect the table top but also wanted it to have air flow for the vacuum to hold down the board.  I don't think that your going to get much air flow thru what I call MDF of any thickness.   Maybe the Masonite Hardboard Peg Board material would do what he wants.

Ben