[sudo-discuss] laser PC board etching

[Henner Zeller]

On 3 December 2017 at 14:47, Cere Davis <ceremona at gmail.com> wrote:
> Here’s another data point:
> http://cds.cern.ch/record/1214725/files/PH-EP-Tech-Note-2009-003.pdf

So that would indeed be nice. I have one assembly with a full f-theta
lens somewhere, so that might be an interesting experiment.

>
> On Sun, Dec 3, 2017 at 2:44 PM, Cere Davis <ceremona at gmail.com> wrote:
>>
>> 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
>
>
>
>
> --
> Cere Davis
>
> Science-Art | Kinetic Sculpture
> CereDavis.com
> @ceremona