Hi Buckwheat,
maybe you should refrain from condescending remarks which I have highlighted in bold. It doesn't add any useful information. I could easily remark "Perhaps its not just your Mandarin that you are slaving over and perhaps you should have read it tad more carefully."
I did say print not plot. I also said HP2600 laser printer again not a plotter. I also did not say it was inkjet but rather a laser printer. I was informed that majority on this forum and other tech forum, members are not necessarily familiar with printing technology nor with electronics. I tried to keep it simple for the new person. If you are still not sure I print the gerber image onto a transparency using my HP laser printer. It can print images and not just text.
Slavkok had no problem understanding my concern and was able to reply as to why he was going down the road he chose. And someone else did quip that it will take 15 to 20 minutes to write a moderately sized board.
I do have lot to offer technically. I do not need flaming from participants. It is my choice to be here to be helpful. So if you wish to feel like a big man by flaming people, go right ahead and others here will not get any technical information. Not some false information often found on internet. e.g. can't store copper chloride in plastic container. Copper chloride is a metal salt and will not attack plastic.
There were few others wrong information floating around.
If you are having inconsistent exposure, you may need to be using a calibrated exposure scale from Stouffer http://www.stouffer.net/Specialtyguides.htm ... You may be over exposing.
Sincerely,
Ms. Smilingcat
--- In Homebrew_PCBs@yahoogroups.com, brane2 wrote:
>
> Hmm... I'm not trying to be language fascist as god knows I make many
> mistakes, but here I have hard time following what you are trying to say.
>
> Maybe quick brush-up with some online english course would be in order ?
> Damn it, if I can slave with mandarin, you should be able to endure an
> english lesson or two... ;o)
>
> Anyway, if I understood you correctly, you:
>
> - are using classical approach with photoresist and UV exposure
>
> - i don't understand what you mean by "photo". Is it "photoplotter"
> transparency, done in some graphic shop ( on a something like Linotronic
> imagesetter)
> OR
> .. you mean transparency printed on inkjet
> OR
> ... you mean transparency, printed on laser
>
> It is also not clear how does your transparency differ from drill
> coordinates. Does it get randomly stretched or it is just pseudorandom-
> seemingly random but exactly repeatable with repeated print of the same
> content ?
>
> I tried it with Epson's R800 and results seem at first glance very
> repeatable, but not enough dark. This is why I'm checking cups drivers
> on Linux to see whether I can persuade printer to make several passes
> over each point of the page without reinserting the page as printer
> never seems to grab it exactly the same way and edges get fuzzied and
> multiplied.
>
>
> Best regards,
>
>
> Branko