[KwartzLab] Laser Party! Tues, Jan 10
Chris Bruner
cbruner at quadro.net
Mon Jan 9 16:00:27 EST 2012
So, what you are saying is that using a sharpie or something coloured,
on aluminum will allow you to etch the sharpie away and that process
marks the aluminum?
On 1/9/2012 3:48 PM, Jeff Schmidt wrote:
> Good points!
>
> I have etched aluminum on a laser before, at Waterloo Engraving. And
> by etch, I mean mark the anodized layer. In that case, I had a matte
> black anodized case which was etched with a raster image. The black
> anodizing turned nearly white, while the smoothness of the metal was
> unaffected.
>
> This time around I have a red and a blue anodized piece. They are
> slightly more reflective than the black. I am hoping that they will
> "etch" white as well, though.
>
> Once the etching is done I'll drill the holes in the panel with a
> drill press.
>
> - Jeff
>
> ------------------------------------------------------------------------
> *From:* Cedric Puddy <cedric at ccjclearline.com>
> *To:* Jeff Schmidt <digitalfalcon at rogers.com>; KwartzLab Public
> Discussion List <discuss at kwartzlab.ca>
> *Sent:* Monday, January 9, 2012 2:35:05 PM
> *Subject:* Re: [KwartzLab] Laser Party! Tues, Jan 10
>
> It's going to be interesting to see how well it does on aluminum;
> I was talking with James, and he thinks it will just ablate the
> aluminum oxide layer, and will not be successful in marking the
> underlying pure aluminum. I'd be happy to try just in the name of
> "science" (wherein "science" is a word we use to refer to the act
> of "checking to see if James is right again").
>
> James went on to say that there are "marking compounds", which
> small etching shops and whatnot use, in which they paint the
> compound onto the area to be laser etched. My assumption is that
> the compound comprises a ready supply of atoms that require a
> relatively modest amount of power to drive into a chemical bond
> with the underlying metal, so when you hit them with a relatively
> small laser, you get an effective permanent chemically bonded mark.
>
> Interestingly enough, apparently Yag lasers are far more effective
> on metal than CO2 (we have a CO2 at the lab), but are less popular
> on account of being completely ineffective against organics (such
> as paper, leather, wood, etc). Word has it that there are dual
> tube units in the world that have both a CO2 and Yag source able
> to supply the beam line, and able to be electronically switched.
>
> -Cedric
>
>
> On 2012-01-09, at 2:13 PM, Jeff Schmidt wrote:
>
> > Cool, thanks.
> >
> > In the mean time, do any members want to laser my panels for
> me? I'll buy you some pizza at Pepi's in exchange. :)
> >
> > - Jeff
> >
> > From: Darcy Casselman <dscassel at gmail.com
> <mailto:dscassel at gmail.com>>
> > To: Jeff Schmidt <digitalfalcon at rogers.com
> <mailto:digitalfalcon at rogers.com>>; KwartzLab Public Discussion
> List <discuss at kwartzlab.ca <mailto:discuss at kwartzlab.ca>>
> > Sent: Monday, January 9, 2012 1:27:05 PM
> > Subject: Re: [KwartzLab] Laser Party! Tues, Jan 10
> >
> > We don't know yet. Non-member laser use policy is up for discussion
> > at the next board meeting. We'll let you know!
> >
> > Darcy.
> >
> > On Mon, Jan 9, 2012 at 11:57 AM, Jeff Schmidt
> <digitalfalcon at rogers.com <mailto:digitalfalcon at rogers.com>> wrote:
> > > I'm sad I won't be able to attend. I've got some aluminum
> panels that I'd
> > > love to have engraved. Perhaps next week! What's the cost to
> use it for
> > > non-members?
> > >
> > > - Jeff
> > >
> > > ________________________________
> > > From: Darcy Casselman <dscassel at gmail.com
> <mailto:dscassel at gmail.com>>
> > > To: KwartzLab Public Discussion List <discuss at kwartzlab.ca
> <mailto:discuss at kwartzlab.ca>>
> > > Sent: Monday, January 9, 2012 10:49:03 AM
> > > Subject: [KwartzLab] Laser Party! Tues, Jan 10
> > >
> > > That's tomorrow,
> > >
> > > Sorry for the short notice. It's been discussed in person, but
> not so much
> > > on the list.
> > >
> > > Our official laser cutter ribbon cutting will happen tomorrow
> night during
> > > TON. We'll have talks and demos and it'll be awesome.
> > >
> > > (It is my hope that we can get the laser cutter to cut its own
> ribbon, but
> > > as I'm not a trained laser cutter operator, I can't make that
> promise...)
> > >
> > > Darcy.
> > >
> > > _______________________________________________
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> > >
> > >
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--
Chris Bruner
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