They’re YAG lasers, so yeah $$$$$ is right.
Spot size starts with wavelength, smaller wavelength = small spot, so UV < Visible < IR.
A YAG will be 1/10th the size of the typical IR CO2 lasers simply due to frequency of the light.
A lens with a short focus is next, a problem there is scanning and short focus don’t get along well.
“How big is the spot” varies depends on a lot of variables, including defining just what the spot itself actually is (scatter etc).
Save your pennies and get one of these:
http://www.youtube.com/watch?v=mzmjGz0_joM. My reaction to seeing that was “That’s awesome!” – most lasers can’t etch copper, indeed some systems use copper mirrors for that reason.
Tony
From:
Homebrew_PCBs@yahoogroups.com [mailto:
Homebrew_PCBs@yahoogroups.com]
Sent: Saturday, 20 December 2014 5:40 AM
To:
Homebrew_PCBs@yahoogroups.comSubject: Re: [Homebrew_PCBs] Re: laser ablation of paint on copper clad
HI, jeff
On this page :
http://www.beamtech-laser.com/en/proInfo.aspx?m=20101216100729203892&n=20101222115304745038&protype=20101216101714765927 they speak of that kind of laser spot resolution.
But only by the looks of it I think its going to be a $$$$$$ digit number ...LOL
camillus
On 12/19/2014 10:43:29 AM, jeff.heiss@... [Homebrew_PCBs] <homebrew_pcbs@yahoogroups.com> wrote:
The Bungard drum plotter has laser spot size of 0.005mm/0.0002inches. This is a resolution of 5,000 dpi. The laser inside is a red 670nm laser. How do they achieve this? What laser and lenses are used?
Is red sensitized photoresist film common? Where can it be purchased?
Photoplotter <http://bungard.de/index.php?option=com_content&view=article&id=43&Itemid=60&lang=english>
<http://bungard.de/index.php?option=com_content&view=article&id=43&Itemid=60&lang=english> Image removed by sender. image
<http://bungard.de/index.php?option=com_content&view=article&id=43&Itemid=60&lang=english> Photoplotter
Filmstar-Plus is the name of the next generation of our bitmap photoplotter series. Optimized for inhouse production of high end film layouts at reasonable p...
<http://bungard.de/index.php?option=com_content&view=article&id=43&Itemid=60&lang=english> View on bungard.de
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Jeff
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