100W Co2 laser MPCNC

This topic contains 50 replies, has 23 voices, and was last updated by  Ryan 1 year, 1 month ago.

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    I want to share my project with all of you.
    There are still a lot of improvements to make but the first results are there.

    First printing all the parts (I have changed several but this was my start)

    Building it up:

    Connecting everything:

    The laser came 🙂

    My kitchen was not big enough for the laser setup 😀

    Testing it with a laserpointer if the mirrors are in the right position.

    First dry run Laserpointer (movie)

    Mirrors looking good.

    Testing the tube:

    Put the laser in position and tested the laser with the mirrors.

    Testing the laserpoint with lens (movie)

    Testing the laser on wood (movie) first computer run and to high power, haha!

    Getting better with the program, laser power using InkScape

    But img2gcode is not going well for now.

    Doing some calibrations.

    Testing the laser power.

    If you look closely you see it is not a clear line. The end of the laserhead is still a bit moving. I decided to make a new laserhead mount. I will remove the Z-axis with this fixed block. In the near future I’m going to make a Z-axis moveable table.

    I will update this post when I got more information.

    3 users thanked author for this post.


    Awesome 🙂

    How are you mounting the tube ? I cant see it on the pictures.
    And…could it be possible to skip the mirrors and alignment….and just mount the whole tube vertical on the MPCNC ? (i have no idea how co2 lasers work)

    How much did the lasertube cost ? and does it should it last before needing replacement ?

    Would love to build this myself too



    CO2 laser tubes are fragile, and full of water. Not something you want moving around.



    I was just thinking since Glowforge and similar $3-4-5000 lasercutters carry the lasertubes on the moving gantry, if maybe having it mounted vertical would work too, but what you are saying does makes sense.


    Dui, ni shuo de dui

    Very nice build, I particularly like your enclosure.

    This is something I plan to do with my MPCNC so I will follow your thread closely and I really hope you will keep us updated!

    Given my (little) experience with the MPCNC, I think that one of the first things you should do is to make the chassis stiffer. It can be done quite easily with a few wood blocks, nothing very complicated. It is particularly clear that the whole machine wobbles when I zoom on the pictures of the tests you posted.

    Rigidify your chassis, and lower the X-Y jerk setting and the accelerations for your first tests (if not already done). These are easy improvements that will, in my opinion, solve most of your problems.

    Could you post some pics of your mirrors system, I would be very interested to see?



    Did you mount the tube? Do you have any more pics of the mirror setup? I want to try a Co2 laser as well. Do you get that laser from ebay? Thanks Renz



    @Dui, ni shuo de dui ,

    First of all thnx! And yes I know that the MPCNC isn’t that stable but it was also the laserhead that got a bit wobbly. The end was fully stretched.
    I build a new laserheadblock and going to replace it Wednesday with this:
    Laserhead pic 1
    Laserhead pic 2
    Laserhead pic 3

    And I while I was un-mounting the Z-axes I found out that it also was a bit lose. I’ve fasten some of the bearings and that solved the problem.

    I will make some more pictures from the mirros and will draw a little picture.
    I’ve also made a electronic wire diagram for the laserpower supply and the Arduino. The powersupply for the laser don’t allow you to give it 12V. So you can’t use the M106 and M107 but you need to use the 5v output so I took the M42 P4 setting.

    The difference
    5v or 12v

    The demo setting for the powersupply was:
    Demo powersupply

    And the with the arduino:
    powersupply with arduino

    @renegadez , I did buy the laser tube and powersupply with mirrors and the lens on ebay. But I bought a Reci Laser because I did some reading and it should be the best… not really that sure but I had to give it a try 🙂

    *Edit: I don’t know why my pictures are getting rotated, sorry for that…



    Here is a new update.

    I mounted the mirrors at the back at the laser, on the moving arm and made a new laserhead holder.

    Then I did some aligning. Remove the mirrors and place the back plate back in the holder. Cover the mirror hole with a piece of tape. Shortly fire the laser and look if it aim straight.

    Mirror aligning
    Head aligning

    Then I did some test runs with 8 MM plexiglas

    WARNING! Cutting plexiglass will produce chlorine gas when combined with the natural moisture in the air creates a form of hydrochloric acid. Be WARNED!

    I have mounted ventilation to the outside!
    Test run 4

    Tried a name

    More test runs:
    Test run 15

    Nice and clear!

    Also tried engraving, it is not great but a start.

    Also on wood, still not great but had to give it a try 🙂

    Soon more!


    Vincent Pollaro

    Impressive! Experiencing laser envy.



    That’s very cool!



    Man I want a laser like that! I second the laser envy.



    If I have time this weekend I will do some more runs and testing stuff.
    But engraving isn’t easy, I still need to do a lot of tweaking.

    But there is a beginning. Soon I will share the laserhead mount need to make a few adjustments, print and test it again.
    Only takes 42 hours to print and a role fillament (800 grams) 🙂 The new design is a bit smaller maybe 600 grams and 32 hours printing.



    Holy shit! Are you printing it solid??!!?



    No I’m printing it with 60% filling …



    For prints of this size I would use a bigger nozzle, not only for time, but for strength too, a 0.6mm nozzle will output 4x amount of plastic compared to a 0.4mm nozzle, translated it means a 0.6mm nozzle with 0.36 layerheight would print the 32hr print in 8 hrs, with a small reduction of detail but a much stronger part.



    This is sick! I am super jealous. Keep up the great work man.


    Martin DB




    Is this a 1064nm laser? Was that aluminum you cut? I’m curious how thick of aluminum and steel you could cut cleanly with this. I’ve been doing a little research on DIY CNC laser cutters but there doesn’t appear to be much out there besides engraving



    @mikalcarbine ,
    I didn’t bought this laser for cutting aluminum or steel. If you want to do that you need a different lens and a different place. My build is in a wooden box, you can imagine what will happen 🙂

    It is a 102w Co2 Reci laser.




    Clear plexiglass cutting!

    1 user thanked author for this post.


    Today I found out there are several types of Plexiglas. Proberbly I have 2 types… with and without tension.

    This example show you with tension in the plexiglass. See attachment.



    And a new result from today:

    1 user thanked author for this post.


    Also tried to engrave. But … 100w laser is not good to engrave.
    For the picture in the post I only used 25% of the power from the laser as max engraving … just too much.


    Tom Cole

    I am ignorant to machining/cutting/engraving with lasers. This is very interesting.



    @Tom Cole, I hope you find all information you need. I would be happy to answer any questions you have.


    Jesper Max


    Really nice work!
    Do you have a link for the laser head parts and mirrors and also for the psu?



    I ordered all the goods from this Ebay store

    This parts:

    You also can find the 100w laser tube there.

    and some additional lenses but didn’t had time to test them. Will post that soon!

    For now, I created some nice plexiglass stuff. Ordered several colored plexiglass.



    wow, this is AWESOME, I have been waiting for someone to do this.

    Do you know how to rotate your photos? If you did that, it would make your post a lot better.

    Did you design any additional prints? Did you post the laser lens holder to thingiverse? Did you print mounts for the laser tube in its case? If so which ones. This is an AWESOME project and I think it deserves a more complete and organized writeup.

    1 user thanked author for this post.


    No I don’t know. The original pictures are hosted from my website. Maybe they are to large. It is something with this site.
    I made a new printheadholder for the laser head. It is not really done that’s why I still won’t share it.

    Made some new progress too. Tried some laserbeddings small and large gaps but they are coated metal and you can see the reflection back into your lasered objects. Ordered a new one maybe some new results soon.

    Maybe it’s a good idea to delete this topic and start a new one from scratch with a good buildup, pictures and explanation.
    What do you guys think?



    I definitely think that would be a huge benefit. If you get this as a proper writeup outlining things like

    what it is and what it can do with proper youtube videos(for folks that haven’t used co2 lasers and don’t know how amazing they are)
    Bill of materials(with links)
    build steps

    I’m curious how safe it is since it doesn’t have an enclosure. Blindness scares me. An enclosure wouldn’t be hard to build, though.

    You could probably put all of that in a 10 minute youtube video that is well filmed with a thoughtout voice over, and accomplish the same goal.

    As soon as you properly document this, other people will start doing it. A lot of people. This is a seriously awesome thing and a LOT of people want one of these. I’m probably going to go buy parts and do one, though I might just put together a 40 watt by taking apart one of the cheap chinese laser cutters.

    Is this compatible with the MPCNC firmware for the ramps? Did you have to mod it or install a laser firmware?

    sounds like you are making a fixed z axis gantry. For your mobile gantry, how did you align the laser beam with the moving z? Do you have a fixed mirror on the z axis gantry that reflects the light down into it?

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