Homebrew PCBs

On Thu, 26 Feb 2004 19:00:08 -0800, Brian Pitt <bfp@...> wrote:

> the end with the pins and traces was first and that was were it stuck 
> best
> for I'm guessing the circumference of the drum after that it started 
> getting
> dropouts and low toner density and then picked back up near the end
> for some reason
>
> it may have something to do with the density of fill in those areas
> the board outline was much darker than the fill area even in the
> stripe with the lowest toner density and vertical traces and isolated
> doughnuts seemed to do better than horizontal traces or connected fills
> (?or that could just be a red herring? :)
>
> Brian


the filled areas are always not so dense.

My guess is that as the charged drum moves past the developer the "point 
charge"
of a thin line gathers up the adjacent toner also. in a filled area it is 
more spread.


i thought the working last section might be because then the foil did no 
longer contact
metal parts and maybe was charged up a bit, but this is a wild guess, i do 
not know
your printer...

ST