Homebrew PCBs

Adam Seychell wrote:
> Andrew wrote:
>>
>> Does the Epson peizo print head have less
>> scatter of dots than the Canon Adam uses ?
>> Your photos of the 6/6 artwork certainly
>> look less jaggy than Adams.
> 
> Unfortunately all inkjet printers seem to suffer the same problem. Since 
> its invisible to the naked eye , printer manufactures are unlikely to 
> bother improving it. All that is needed is to slow the print head by 10 
> times. You may wait 5 minutes for a printout, but who cares ? I can't 
> think of any applications other than for hobby PCBs. Professional screen 
> printers who use inkjet printer transparencies for photomasks don't even 
> need that accuracy and any PCB manufacture will use a laser photoplotter 
> (3000+ dpi). So the marketers of inkjet printer manufactures aren't 
> going to get any calls from customers demanding reduced line edge 
> jaggedness.
> 
> If your interested, I can send you similar images produced from an Epson 
> Stylus 660 printer.
> 
>> In my case the bubble etcher will fully
>> etch a stripe down one side of a board in
>> 1/2 the time it takes the middle of the
>> board to etch.
>>
> 
> This agrees with my experience with bubble etching too. For really fine 
> lines, such large etch non-uniformity is unacceptable. Another thing to 
> note is Derek's test pieces had 6 mil spacing between 6 mil lines. I bet 
> if one of those 6 mil lines were far away from surrounding copper then 
> it will get etched faster, and therefore more undercut.

Using a Stylus 460 printer driver on linux (CUPS printing), i've got it on
a mode where a 50mm long pcb will take atleast 10 mins to print. The resolution
is very high.