Homebrew PCBs

On Thu, 08 Aug 2013 16:14:08 -0000, you wrote:

>I've etched a couple of great boards using the Pulsar toner transfer paper and green foil.
>
>The problem I've had is my laser printer doesn't produce accurate artwork. It's not even consistent from page to page, so I haven't had any luck trying to scale the original image to get an accurate print.
>
>This is exacerbated by my wanting to use my CNC router to drill the holes. Holes that are a little off when hand drilling are OK, but not so much when CNC drilling.
>
>Does anyone use a laser printer that produces repeatable and accurate artwork?

Mine probably doesn't (HP2100 series), if you ultimately want to keep
doing this, then consider a video camera and software to accurately
locate the holes (coordinates get close), then CNC zero in on it.  Not
a trivial project, I'd think, but worth it if that's the way you will
go.

Harvey

>
>--Rick Watson
>
>--- In Homebrew_PCBs@yahoogroups.com, "Rick Sparber" <rgsparber@...> wrote:
>>
>> Like so many of you, I was fascinated with David's work on using a laser
>> printer and laminator to fuse toner onto copper. It was all there in his
>> email, although a bit compact. With his permission, I have unpacked that
>> email into a procedure. This document will evolve as David makes
>> changes/corrections. He also plans to add pictures. Thanks Dave!
>> 
>> The last round of changes came from questions from the group. So keep those
>> questions coming. 
>> 
>> If you are interested, please see
>> 
>> http://rick.sparber.org/electronics/cel.pdf
>> 
>>  Rick
>> 
>