[sudo-discuss] laser PC board etching

[Cere Davis]

Well, if this is to be believed
https://www.hindawi.com/journals/ijp/2009/150389.fig.002.jpg, I think the
only real problem might just be a slightly less stright line, which could
be compensated for in software.  Pretty sure the f-theta lens I have is
made from PMMA.  It looks plasticish and most of the cheap lenses are made
from this these days.

Really informative reddit conversation on this:
https://www.reddit.com/r/askscience/comments/3p88vp/how_is_plexiglass_pmma_made_to_be_uv_and_ir/

Unfortunately, the f-theta lens that you get with it is optimized for
> the near infrared wavelength the laser printers operate at and uses a
> lot of energy when used with a 405nm laser. So direct mirror might
> still be the best option (but I have never myself tried the f-theta
> lenses in these equipments with 405nm, maybe it still is viable
> enough?)
>
> I am currently experimenting with bending mirrors to get a cone mirror
> ( https://github.com/hzeller/ldgraphy/blob/master/design.
> md#cone-mirror-arc-exposure
> ), but these experiments were not that successful yet (but this
> project is only one of many, so things are slower than they could be).
>
> > I have a BB and all
> > the other components are pretty easy to acquire.
>
> I am currently working on a cape for the pocket beagle for LDGraphy.
> which will be nice and compact and also cheaper as the PocketBeagle is
> only $25.
> https://plus.google.com/u/0/+HennerZeller/posts/SnVTjc24AbJ
> Goal here is to actually make double sided boards with two lasers from
> two sides.
>
> Anyway, I will probably only have more time on this more later this
> year or January to finish up things.
>
> -h
>
> > I’m not inclined to work on this alone, but if other people have a
> burning
> > need for something like this, then I would certainly like to collaborate!
> >
> > -Cere
> >
> >
> >
> > On Sat, Dec 2, 2017 at 11:53 AM, Adam <me at adammunich.com> wrote:
> >>
> >> Wrong wavelength, resolution.
> >>
> >>
> >> On Dec 2, 2017 11:04 AM, "Cere Davis" <ceremona at gmail.com> wrote:
> >>>
> >>> I mean cool, but why not just use a laser cutter on low power?
> >>>
> >>> ...emailing on the go...
> >>> @ceremona
> >>> http://ceredavis.com
> >>>
> >>> On Dec 1, 2017 5:23 PM, "Jake" <jake at spaz.org> wrote:
> >>>>
> >>>> Henner made an open-hardware system for UV curing photoresist, and it
> >>>> works:
> >>>>
> >>>> https://github.com/hzeller/ldgraphy
> >>>>
> >>>> On Fri, 1 Dec 2017, Cere Davis wrote:
> >>>>
> >>>>> I mean if it could be UV laser cured with just a laser cutter on low
> >>>>> power
> >>>>> etch mode, that would be ideal.
> >
> >
> >
> >
> > --
> > Cere Davis
> >
> > Science-Art | Kinetic Sculpture
> > CereDavis.com
> > @ceremona
>



-- 
*Cere Davis*

Science-Art | Kinetic Sculpture
CereDavis.com
@ceremona <http://Twitter.com/Ceremona>
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