Author Topic: Materials that I can cut  (Read 6489 times)

nottingham82

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Re: Materials that I can cut
« Reply #30 on: October 28, 2016, 09:02:37 AM »
Sorry I don't remember what my speeds were...I have since changed my laser tools in my BenCutLaser program.

You'll have to experiment  :)

Oh no! but I got into this hobby to be spoon fed the answers and not tinker at all! Jk I'll do some cuts and let you know how it works out for me!! Stand by pictures to follow later today
Laser: 2500mw A5 eleks maker
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nottingham82

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Re: Materials that I can cut
« Reply #31 on: October 28, 2016, 01:59:16 PM »
so far i like 50 as a speed and 3 passes although 5/6 passes at 100 works too.  but 50 seems to cut cleaner with no left over hanging chads

Edit: for ross: 1/8" acrylic color #2092 (http://www.ebay.com/itm/321718397453?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT) 2500 mw laser
« Last Edit: October 29, 2016, 09:03:03 AM by nottingham82 »
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ROSS

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Re: Materials that I can cut
« Reply #32 on: October 29, 2016, 12:33:11 AM »
It's not just the settings and passes..we need to know the THICKNESS of the material being cut when we refer to what can be cut etc.,
then a table can be made for personal use (depending on the power of the laserhead used.)
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Lasers are wonderful machines..not ONLY  can they cut a finger off BUT  they can also cauterise it at the same time.....

SAFETY -  IS NO ACCIDENT

nottingham82

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Re: Materials that I can cut
« Reply #33 on: October 29, 2016, 11:35:41 AM »
So I'm liking the 50 speed 3 pass for the above listed green acrylic.  There is at least 1mm of shrink because it melts a pretty big swath as it burns through.  less time and more passes is thinner but less consistent on how much cuts through. here are some pictures.  you can see part of it is whiteish.  I rastered after the three pass cut. My phone camera doesnt like macro so this was the best close ups I could get.
« Last Edit: October 29, 2016, 11:50:13 AM by nottingham82 »
Laser: 2500mw A5 eleks maker
OS: Windows 10 all in one pc
Software: T2
http://www.gearbest.com/3d-printers-3d-printer-kits/pp_290386.html Paid $160 in 2016

ROSS

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Re: Materials that I can cut
« Reply #34 on: October 30, 2016, 12:49:24 AM »
Thanks for the info......
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Lasers are wonderful machines..not ONLY  can they cut a finger off BUT  they can also cauterise it at the same time.....

SAFETY -  IS NO ACCIDENT

Agastar

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Re: Materials that I can cut
« Reply #35 on: October 31, 2016, 07:17:19 AM »
Cool, I'm about to do the same on some clear red acrylic to make some air holes for my vent fan in my cover for my laser engraver.

Fiacha

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Re: Materials that I can cut
« Reply #36 on: November 05, 2016, 10:12:45 AM »
A while ago I had access to a 60W Epilog CO2 laser cutter. The local wisdom was that the top paper should be left on the acrylic because the beam caused the plastic boil and leave a spatter of dots on the surface. I suspect that the white stuff you are seeing isa build up of that spatter. Please note that I have yet to try cutting acrylic with my 2.5W laser.

Also, I prefer the look of many repeats of a fast cut to fewer repeats of a slow cut. I have been working with CX board from a local framing shop. This is white faced, solid cardboard about 1.3 mm thick.
FR 600, Power 255 Passes 20 - clean cuts
FR 600, Power 255 Passes 12 - mostly cuts
FR 210, Power 255 Passes 7 - mostly cuts.
At 600 the cut line is narrower and there is less charring of the edges.

Another consideration is the time between cuts. Again, experience with the Epilog showed that it was necessary to give a cut time to cool down before taking a second pass or ther was a significant risk of the material catching fire. Thus, I am also experimenting with making sure that there is a long toolpath between passes. 

That's it for now.

nottingham82

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Re: Materials that I can cut
« Reply #37 on: November 05, 2016, 10:47:14 AM »
for me the compressed air assist mod seems to keep everything cool and from catching fire.  But with light items i have to turn the pressure wayyyyyy down.
Laser: 2500mw A5 eleks maker
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http://www.gearbest.com/3d-printers-3d-printer-kits/pp_290386.html Paid $160 in 2016

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Re: Materials that I can cut
« Reply #38 on: November 05, 2016, 10:59:02 AM »
>The local wisdom was that the top paper should be left on the acrylic because the beam caused the plastic boil and leave a spatter of dots on the surface.

As an FYI, we don't have splatter problems with these low power lasers  :)

You can still leave the paper on if you wish, but not for splatter.
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