Re: gEDA-user: homebrew UV photoplotter for direct exposing of photo-etch-resist on laminate

[Christoph Lechner <cl0023@xxxxxxx>]

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DJ Delorie wrote:
>>   The last time I tried it, several years ago, it was 0.8mm pitch
>> and an Apple LaserWriter 16/600PS (canon EX engine) and got crap
>> results.  Now I have HP 8100DN and 8550DN printers; do you think
>> either of those would be worth a try?
> 
> Print these and inspect them under a microscope: 
> http://www.delorie.com/pcb/spirals/
> 
> The etched board will almost always be worse than whatever toner is on
> the paper.
> 
>> I'm willing to obtain (to dedicate to this task) any printer that'll
>> provide good results for this.
> 
> Go UV!  There's a bit more investment, but the results are far more
> reliable.
> 
> Either way, I suspect you'll be much happier with your results with a
> hacked laminator: http://www.delorie.com/electronics/laminator/
> Stock laminators are too cool for toner transfer and too hot for UV
> lamination.
My laminator does 195°C after a modification... I feed the PCB into the
laminator 4 times.

The CLJ4600 black toner starts to melt at about 175°C -- the paper
sticks to the PCB then after passing one time through the laminator.

- - cl
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