Laser Cut Box

This week, I worked on creating a wooden box with a laser cutter. I have some experience with the laser cutter, but never to the extent that this project is. I have been wanting to create things through laser cutting, so I was very excited for this topic.

I started with a tutorial session with a TA so that I could walk through the steps with someone who knows what they are doing.

I first created a nameplate drawing in Adobe Illustrator. (See Below)

I then uploaded it to the PCs in the laser cutting lab. I had some scaling issues when uploading it though because it downloaded way bigger than it was supposed to be. After some readjusting though, we were able to scale the drawing to the right dimensions.

I printed my nameplate on the Fusion M2 laser cutter and set it to its standard settings tested by the TAs, which were 38S, 100P, 50F, and four cycles to vector cut. For the engravings the settings were 100S, 100P, 600DPI.

I then cut my nameplate! It did not have any flame, but it cut mostly through with a few sharp edges that I needed to sand down.

After successfully working the laser cutter with a TA, I now had to complete my box on my own. I started with the Makercase website to formulate the box. I added 4″x4″x4″ dimensions and a material thickness of 0.16in measured from the material I had used for the nameplate. I set all the correct functions such as outside dimensions, closed box, finger joints, and my desired finger size.
I then had to calculate the kerf of the laser cutter with a kerf print. I used the template given on canvas and laser cut the kerf design on the Fusion Pro laser cutter. The first attempt was unsuccessful, and the laser did not cut through the wood completely.
The second attempt though was much more successful and I was able to measure the gap. The image above shows my kerf design printed and taped after measured so that the pieces would not get lost. I measured the gap to be 0.0625″ meaning that the kerf would be 0.00625″. I then went back to my designed box, entered the kerf, and downloaded the file.

I then uploaded the file into illustrator and grouped four of the squares together and then two of the squares I copy and pasted to a separate file. I did this so that I could print only two squares at first to make sure that they would piece together properly. I then had two files one with four of the squares and one with two of the squares. I also added my name information and college crest on two of the squares in the four-square file.

Finally, it was time to start printing. I used the same printer, Fusion Pro, that I used for the kerf cut, so that it could stay consistent. I first cut out a small test square to make sure my settings were right. I started with the given settings by the TAs, for vector cutting: 55S, 35P, 50F and 4 cycles. The cut went well and I began cutting the box.
I started with the 2-square file and the first attempt was unsuccessful. The laser did not cut through the wood basically at all and I had to force the piece out and broke some of the wood.
On the second attempt I increased the power to 38 and tried it again. It was more successful, but still difficult to pop the squares out. I put the pieces together to see if they would fit and they did!

I did notice though that they seemed smaller than 4″. I measured the squares and they were smaller than they were supposed to be. I think their scale was messed up when I imported it from Makercase to Adobe Illustrator. On the third attempt, I fixed the scale of the squares making sure that they were 4″ x4″ and I increased the power to 40. Finally, I was able to print all the pieces of the box and assemble them!

The engraving of McMurtry Crest became a little covered which I think is another result of the uploading process. It was not shaded like that in Adobe when I was creating it, but when I uploaded it to the laser cutting computer, I think it scaled weird making the X in the center a thicker line.
Cost Estimate
Adobe Illustrator Week Subscription:
         $263/year -> $5.03/week
Wood material: $10
Laser Cutting per hour: $15   -> According to common laser cutting services
Labor: $7.25*2 hours = $14.50
Total: $44.53
Workspace and Wooden Panel