posts tagged with the keyword ‘laser’



Someone on the Milwaukee Makerspace mailing list posted an email with the subject line Laser cutter expert, so I could not ignore it. The person was specifically asking about exhaust systems. Above is a photo of what I built for the 40 watt laser cutter in my basement, and below is most of my reply.


The exhaust from my laser cutter is a 4″ diameter vent hose, which I connect to a 6″ hose with an adapter I got from Home Depot. (In this photo you can sort of see the while plastic piece that attaches to the back of the laser cutter. It has a small and inadequate fan that came with it.)


The vent hose coming out the back of the laser cutter connects to an inline fan that is mounted to the ceiling…


The output of the inline fan goes to another step down adapter and then a quick connector that twists to lock into place.

I’ve also got an AC Variable Voltage Converter which allows me to run the blower at lower speeds if desired. (I sometimes dial down for paper, thinner material, etc. to reduce suction and noise.)


I then have a basement window that I replaced with a piece of wood on the outside and pink foam on the inside which has a hole in it (covered with a laser cut screen) on the outside, and on the inside the quick connect that I connect up when I use the laser cutter.

This just gets all the fumes out of the tiny room the laser cutter is in. It doesn’t scrub the air. I am not cutting for hours at a time. My main goal was to not have my spouse come home and say “why does the whole house smell like melted plastic!?” and I think I’ve achieved that goal.

Here’s the list of all the components I could remember:

Oh, and if you want to see a real laser cutter exhaust system, or at least the details of building one over many years, check out lasercutterventingsystem on the Milwaukee Makerspace wiki.


Road to Maker Faire

Remember my Laser Kaleidoscope project? Well, I entered into into the Road to Maker Faire contest, and now I need your vote!

Help send me (and my laser!) to the Bay Area Maker Faire. Use the big bold button below to vote for my project. (You’ll need a Facebook account, but 98.483% of people who use the Internet seem to have one.)

But why should you vote for me? I’d like to explore making this thing into a kit that would teach people about things like basic electronics, lasers, engineering, and fun. I’m hoping a visit to Maker Faire will give me the opportunity to talk to knowledgeable people and learn more about building it into an actual kit you could purchase and build yourself. That’s the plan!

So yeah, vote… vote now, not later. And then ask your friends to vote. Did you vote yet? Thanks! I appreciate it!

Vote Now!

Note: Voting is over! Thanks to everyone who voted for me… now we wait!


Since we’ve got a laser cutter at Milwaukee Makerspace, I wanted to test out the BoxMaker and cut a box out of wood.


BoxMaker is a sweet little web app that lets you put in the dimensions and spits out a PDF file with what you need. I wanted a box 3″ x 5″ by 2″ and for the material thickness, I got out the digital calipers and took a measurement. (Take note of this! The material thickness is important later on…)


So here’s the PDF file I got. Depending on the size of your material (or how much you want to waste) it may make sense to move the pieces around. Since I imported the PDF file into CorewDraw (which is what the laser uses to cut things) it was fairly easy to rearrange the pieces. I also deleted the text that describes the box. I could have just made it a color the laser cutter ignores, but I figured I had the info in the original PDF file.


Now, our laser cutter is 25 watts, but since it’s old and may need some cleaning, it might not be outputting 25 watts, so when I put my thin piece of wood into the laser cutter, MattN mentioned that it wouldn’t cut it. I figured I’d give it a try, and yeah, even though I did multiple passes and tried to refocus the laser, it just couldn’t do it. I kept checking the depth of the cut, but it just wasn’t “cutting” it. (Pun intended!)

At this point I was fine with the failure to cut wood, and I knew the laser cutter could handle acrylic, so I grabbed a piece of that…

Cut Acrylic

The laser got through the acrylic just fine, as it’s done before… but wait, what did I say about the material thickness before? I said you needed to measure it! Since the acrylic was thinner than the wood, I should have generated a new file, but I didn’t. So this is what I got…

Finished Box

Here’s my box, with the tabs way too big, which gives it an interesting look I suppose. Not exactly what I was after, but at least I know that it works… mostly.

I also want to try a box with the T-joints like the MakerBot uses. Box-o-tron looks like it will work, if I can get it running. (Any other suggestions?)

Also, I had a fun time trying to photograph clear acrylic, so it wasn’t a total loss. :)


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