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…
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…
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. :)
2 replies on “Lasers and Boxes”
It’s still a cool box. That web app seems really neat. Is the printer just reading the outlines of the shapes from CorelDraw? Will it accept any PDF with line drawings?
Steve, I’ve had issues importing some PDF files into CorelDraw, so while the ones that BoxMaker creates work fine, other may not. Maybe it’s Windows, maybe it’s CorelDraw, I don’t know… I’m working up a post on file formats that have worked for me.
Try making a box with BoxMaker and view the PDF, you’ll see that it’s just a bunch of lines, and that’s what the laser cutter ends up using. (You do what to use vector art rather than a raster image, as it’ll drastically lower the time needed.)