Homebrew PCBs

--- Robert Hedan <robert.hedan@...> wrote:

> Being able to flip a PCB over and print the other side properly requires a
> perfectly 'square' PCB.  A lot of us cut pieces from larger pieces of PCB,
> we'd have to stop that practice.
> ...

> 
> Now if you align the PCB against the edge guide, and align the mark with  
> the center mark on the table, you can print the bottom side. Then you turn  
> the PCB over, and again align it against the edge guide, and the center  
> mark as well, and you have it positioned in the exactly same place only  
> turned over. Then you simply mirror the top layer artwork and print it out.
> 

I believe that no 'square' is needed, only one perfectly straight header side
where to make the reference notch into, and not necessarily at the middle. The
other three can be ragged.
This one side will be fixed 'flat' against the reference border, can be
anything  (leading, trailing, side) as long it is 'fixed' relative to the
printer (motion). This 'reference' has to insure the registration during the
print process, not the board. This reference is part of some sort of tray that
has to move through the printer with +-5 mil tolerance... here is the quid!

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