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CNC Laser any advices?

Discussion in 'Project Construction Technologies' started by Giorgos, Mar 23, 2016.

  1. Giorgos

    Giorgos

    28
    1
    Apr 6, 2015
    Hello people!

    I am hobbyist with electronics and I have already created an Arduino-based CNC Plotter.
    You can have a look here.

    What I want to do next, is to upgrade this device to an engraver or even cutter.

    Can you please suggest me any kind of laser that could be usable for this purpose?

    Thank you!
     
  2. swagguy8

    swagguy8

    73
    6
    Dec 10, 2014
    umm, i'm not very experienced at this, but i heard that they sell straight laser head replacements for retail cnc machines. do a search and i'm sure you'll find a variety of choices.
     
  3. Giorgos

    Giorgos

    28
    1
    Apr 6, 2015
  4. Gryd3

    Gryd3

    4,098
    875
    Jun 25, 2014
    lol. Very little...
    What kind of materials and thickness do you *want* to cut?
    Various plastics tend to melt instead of cut properly, other plastics and materials give off a lot of smoke and mess with the optics resulting in poor cut quality... a 2.5W laser will be able to either cut very thin material or very very slowly for other material.
     
  5. Giorgos

    Giorgos

    28
    1
    Apr 6, 2015
    What about 3mm plexiglass sheet?
     
  6. Gryd3

    Gryd3

    4,098
    875
    Jun 25, 2014
    I seriously doubt anything other than paper to be honest...
    A laser cutter *should* vaporise materials as it cuts... if the laser is too weak, it ends up burning it instead.
    This isn't a case where you can simply go slower, because you will end up with an absolute horrible mess of an edge finish that may actually melt back together when dealing with plastics.
    I'm sorry, but I do not have a minimum requirement for you.
    I would suggest mapping out the max transit and 'cut' motion of your machine. Use that info in addition to the material you want to cut and check with some CNC-Laser specific sources unless we can get someone else in this thread that has the hands-on experience.
     
  7. Giorgos

    Giorgos

    28
    1
    Apr 6, 2015
    Thanks for the reply
     
  8. swagguy8

    swagguy8

    73
    6
    Dec 10, 2014
    to be hones i think you're better off with a water or drill bit cutting head rather than a laser, it will get quite expensive with a laser if you want to cut metal.i'm sure there are tons of google articles out there that'll tell you the wattage you'll need, if you want to pursue this path for your project.
     
    Gryd3 likes this.
  9. Gryd3

    Gryd3

    4,098
    875
    Jun 25, 2014
    A mill would be the easiest, and the feed-rate, bit, and RPM can be adjusted to suit the material. If the mill is too weak for a 3/4" bit, go down to a 1/4" or 1/8" bit. Lots of options here, but not as 'fancy'
     
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