Homebrew PCBs

> derek wrote:
>
> <SNIP>
>
> The etched board looks like it was from
> laser artwork. The undercut is no greater
> than the width of the jaggies. Why would
> the undercut be any greater with a 5 mil
> track?

I don't think yor undercut has to be any
wider than Adams photo shows his "jaggies"
for it to be marginal at 6 thou does it ?

Those jaggies in the perpendicular photos
look like they are 25% of the 5 thou track
width.

I would consider a track that came out 25%
undersized compared to another track on
the same board was a failure.

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.

> <SNIP>
>
> Why on earth should I get rid of this
> bubble etcher in favor of a spray etcher?

Not saying you should.  I am saying my
bubble etcher is bad and I need to get a
new etcher.  You obviously have a better
bubble etcher than I do.

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.