Homebrew PCBs

On Fri, 08 Dec 2006 16:58:16 +0100, guiman1111 <getter49@...> wrote:

> Greetings,
> I am new to this group though I have been professionally involved in
> the electronics industry for 24 years. I am now in a position where
> making my own PCB is very compelling. The possibility of using a
> direct to copper method seems to be the most straight-forward (the
> fewest steps). My question is this: Has anyone done a double sided
> board using this method. Any registration problems? Does the primary
> side make it through the printer OK when the secondary side is
> printed?
> Thanks,
> Peter


You'll have to let it fully dry before you print the other side. Once  
cured the ink is extremely tough and very difficult to remove.
I think there would be no problems with almost any kind of feeding,  
although i use a flat carrier sheet so there would ne no abrasion.

The repeatability is very good with a carrier, i have no noticeable offset  
of two crosshairs printed in the same place. The key is to start your  
carrier sheet at the same place each time though, with a mechanical stop.  
I have found the optical page leading edge detector is not used  
accurately. To align the sides you can use a straight edge to push the  
board against, and a center mark.

ST