Homebrew PCBs

Thanks Stan
Found this idea very interesting and shall post it on Geotech if that's OK to see if I can generate some interest with hopeful positive feedback



On Friday, 20 June 2014, 5:30, "Harvey Altstadter hrconsult@cox.net [Homebrew_PCBs]" <Homebrew_PCBs@yahoogroups.com> wrote:
 


  
Jeff,

You can get a translation of the portion of the page that is in
    German by going to translate.google.com.  Set it to detect the
    language, and copy and paste the original text into the left hand
    box.  The translate to language should be default to English.  The
    translation, complete with funny grammar, will magically appear in
    the right hand box.  There are also links to schematics, layouts,
    and software.  You can also get translation of the single words that
    are sprinkled into the first section by pasting those words in a
    similar manner

Harvey



On 6/19/2014 6:12 PM, 'Jeff Heiss' jeff.heiss@... [Homebrew_PCBs] wrote:

  
>The www.das-labor.org/wiki/LaserExposer project is very neat.  The good stuff is in the second half.  I wish the page was all English so I could read it.
>    
> 
>From:Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] 
>Sent: Thursday, June 19, 2014 7:05 AM
>To: Homebrew_PCBs@yahoogroups.com
>Subject: Re: [Homebrew_PCBs] Re: DLP for imaging photoresist
> 
>  
>Hello all,
>DLP imageing systems are a reality in the
                              PCB manufacturing industry. Several
                              companies do offer such systems: usually
                              they have one or several heads mounted on
                              a CNC machine, and they synchronize motion
                              control & DLP control to achieve the
                              right insolation of the photoresist. It
                              allows a much higher throughput than LDI
                              systems, even those who use several heads,
                              and is more and more a good option for
                              midvolume production. It also allows an
                              arbitrarily high resolution compared to a
                              static DLP projector, which has a very
                              limited number of pixels, so you have to
                              choose how to use those pixels, and thus
                              between resolution & dimension of your
                              PCB.
>
>I've seen such machines at www.productronica.com in Munich ; I could try to find the references if some of you are interested.
>Needless to say, those systems are very expensive, and not so easy to design ;)
>I'd rather check the conference http://ehsm.eu/ and the talk about http://pcbwriter.github.io/ to see how well this thing works. There are other OSHW projects intended at PCB fabrication, but I'm quite curious to see if one will end up being really useful and powerful.
>C.
> 
>On Thu, Jun 19, 2014 at 2:16 AM, stan_katz@... [Homebrew_PCBs] <Homebrew_PCBs@yahoogroups.com> wrote:
>  
>This technology was reported for student use at Pomona College back in 2005:
> 
>https://www.physics.rutgers.edu/ugrad/387/388s06/film_deposition/Musgraves05.pdf
> 
>The cost of the setup was in excess of $5000 due to the use of a consumer grade DLP projector (which are still pricey) and a lab grade trinocular microscope.  The article claims even an ordinary stereo microscope can be used for less demanding applications. I haven't taken a look, but I'll bet the name(s) of one or more of the principals presenting the above paper are on one or more patents that are held by Maskless Lithography Corporation.
> 
>I hope there are talented folks in this group who might start thinking about putting together a DLP system on a hobbyist's budget. Up until now, the only hobby systems, presented in this group, not requiring some sort of mask, e.g led/laser flat or cylinder photoplotters have been built by individuals with machine shops at home.
> 
>