Homebrew PCBs

Boman33 wrote:
> Note, commercial PCB drilling is not done with vacuum tables.  Often
> multiple layers of boards are stacked and pinned to the table.  The drill
> head basically has a spring-loaded ring that presses down on the PCBs while
> drilling.
>
> Bertho
>   
And they typically use a 20-30 mil sheet of aluminum , under the stack.

Bruce