Laser Air Assist Nozzle

by zilvertail, published

Laser Air Assist Nozzle by zilvertail Nov 28, 2012
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I made this for usages with my cheap china laser cutter.


You'll need this print and one Pneumatic 12mm-1/4" BSPT male fitting

I printed with to shells just incase. Nozzle down

  1. Finish printing and while still hot heat up a fitting of size 12mm-1/4" BSPT

  2. Once the fitting is hot it should screw right on. The first i printed was a little to tight so i lite it up quickly and attached a preheated fitting.

  3. Seal it and attach as you see fit, FIY. Some casket sealing and some strips might give you a perfect fit.

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See the new derived remix i made for my new laser cutter, made new and reused parts from the DC-KIII:


Should work the same, print better, and give a cleaner cut (depending on the air pressure).

Laser air assist nozzle, fits K40 China laser

Hello, I just got this simple laser that has a current knob for laser intensity and moshidraw that runs on a windows XP computer. So far I have to turn machine off and then on many times so I can either cut or engrave. You refer to a DC-KIII you have that looks same as mine but then you can control current by software. How do you do that? My control board is a 10105 I figure on moshi web page. Which is yours? Hope I can follow you in improvement of a promising machine.

So heres my progress of the rework i'm doing on a DC-KIII or what their called. https://www.youtube.com/watch?v=gvZxspw4M68https://www.youtube.com/watch?... I've stripped everything from the laser as it came and this is what i've built as the receiving donor. I hope the transplant will be a huge succes.

Could you post more information regarding the laser cutter? 

How i customized it or what make/model it is? I done alot to it already and don't have a build log so i'm gonna have a hard time written that up.

make/model. It's just the model DC-KIII, atleast thats what shows up on eBay. I have the one with USB for Moshiboard.

Cool, Thanks, Are you by chance planning to post things that you've made with it?

Good timing. Just got one of these machines myself and was thinking of air assist. :)

What are you using for an air source and pipe?

Since i live on the 2nd floor in an apartment building i use an hobbiest air brush compressor, with a membrane cylinder pushing 60L/min, looked around on forums and settled on the 60L/min would be more than plenty for wood and acrylic.

As a hose i just used what fitted the pneumatic lines.

I would recommend not using coiled hose out side the cutter, but that's just for clutter. Remember also that the pneumatic fittings does leak air so you lose some pressure, but that's fine because the air compressor i use needs a bleed-valve.

BTW. your focus lens is probably just tossed into it's socket so create a small ring as a spacer between the socket and the lens. I'm happy i did it. 

Cheers, I'll have a look for one of those. The cutter is going in my attic, so I didn't want anything massive either. 

I'll check the lens, thanks. I'm just swapping the moshiboard rubbish for an open source one from the Laos project. Can use decent programs and Linux then! :)

I'd like to go with the LAOS project aswell just don't know where their at atm.

Seeing that the only functionality i want to pay for is Cutting and engraving in one run.

If LAOS can't do that yet i wouldn't want to change, but i have a hard time figuring that out.

Keep me posted on you LAOS progress thou if you like :)

Laos can handle engrave and cut at the same time. Draw the image in inkscape and print via the visicut software. You can tell it what type of lines are cuts, marks, or engraves, etc.


So far I've got it working, with PWM too. Some minor tweaks to do to the config file before I put it on the wiki, but should do that tomorrow. Only big thing left to do now is get the LCD screen working. Want to put some safety features on the machine too! :) Will test a cut/engrave in one go tomorrow.

Damn, replies are too far embedded, will have to reply here. 

PWM is a hack on mine, I've just got it going through the variable resistor that normally controls power. I just have that set to the max power, then the PWM on the 5v side of the pot.

Damn, now i want it even more... Well i have a sketch of a complete rebuild of the machine on a rough draft atm. I'll utilize some slides from one of the newer rostock models, but i didn't plan on going for a controller for it before the rebuild is done. But now it seems that LAOS is ready for me :)

BTW. PWM is there pins out for it on your PSU or did you "hack" it?