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NNTP-Posting-Date: Wed, 17 Apr 2024 20:59:39 +0000
From: Joe Gwinn <joegwinn@comcast.net>
Newsgroups: sci.electronics.design
Subject: Re: PCB laser cutting
Date: Wed, 17 Apr 2024 16:59:38 -0400
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On Wed, 17 Apr 2024 12:23:47 -0700, John Larkin
<jjSNIPlarkin@highNONOlandtechnology.com> wrote:

>On Wed, 17 Apr 2024 14:13:47 -0400, Joe Gwinn <joegwinn@comcast.net>
>wrote:
>
>>On Wed, 17 Apr 2024 08:09:30 -0700, John Larkin
>><jjSNIPlarkin@highNONOlandtechnology.com> wrote:
>>
>>>On Tue, 16 Apr 2024 21:16:27 -0700, Don Y
>>><blockedofcourse@foo.invalid> wrote:
>>>
>>>>I've been offered a small, 40W laser cutter and wonder if I
>>>>want to make space to store it -- as I suspect I don't have
>>>>many uses for it!
>>>>
>>>>One that came to mind would be cutting odd-shaped PCBs.
>>>>
>>>>But, I didn't think CO2 lasers were good with FR4, etc.
>>>>
>>>>(Or, could I opt for a different board material to
>>>>exploit the laser's abilities?)
>>>
>>>We buy blue anodized boxes and use a Boss laser to blast the artwork.
>>>
>>><https://www.highlandtechnology.com/Product/J744>
>>>
>>>That saves a ton of hassle with labels and silkscreening.
>>>
>>>I tried using it to cut patterns into copperclad FR4, instead of
>>>dremeling. It didn't cut copper very well and burned the FR4. Maybe
>>>some fast pulsed laser would work better.
>>
>>Is this the CO2 laser or the fiber laser?
>>
>>Joe Gwinn
>
>This one is fiber.
>
><https://www.dropbox.com/s/zxnwvk8w7pus7sr/Boss_1.jpg?dl=0>
>
><https://www.dropbox.com/s/70py68edtigk8jf/J270%20Boss%20Laser%20Inside%20Box.mp4?dl=0>

So its wavelength is one micron (CO2 is 10 microns).

One micron is still infrared.  Really need a green to UV pulsed laser
to cut copper without burning FR4.  But these lasers are hideously
expensive.

I have not researched it, but here is the German answer:

..<https://www.trumpf.com/en_US/products/lasers/disk-lasers/>

Joe Gwinn