Homebrew PCBs

Stefan Trethan wrote:
>>A cheap old epson stylus 400 colour will do 8mil tracks/spacing smoothly 
>>in 600x720dpi mode. It's the printer technology and ink/transparency 
>>combination that makes the most difference.
> 
> You don't understand the problem.
> Even a 300dpi unit can do traces of 7 mil but _not_ metric spaced smd 
> parts the printer works in inches and if you print metric spacing you get a 
> variations in line width and space.

With 256pin 0.5mm lead-spaced parts and 8 mil tracks, any granular resolution
of 600x720dpi is still too small to make any noticeable difference. Diagonal
tracks still have smooth edges and hit close to the center of each pad.