Home

Week 6 - Computer-Controlled Machining

This week, I learned about different types of wood and how to cut them using a computer-controlled cutting machine. My room is quite "smol," so I made a something big to give me more space.

Goals

Class Assignment: make something big, using a computer-controlled cutting machine
My Personal Goals:

Things I learned

The Process + Pics

  1. Deciding what to make
  2. I was between a few ideas, but one of my goals for this week was to create something useful for my room. I went with making a shelf because I have a lot of unused wall space, but nearly no floor space left.
  3. Making the file to trace
  4. I used Onshape to design my shelf, because it provided the features I needed, and I haven't downloaded a Fusion360 equivalent on my Linux partition yet. My supports initially had geometric pattern cuttouts that I designed, but Gavin suggested to have an open design to have more support for the shelf. After a few changes, this is what my CAD file looked like: I saved the file as a .dxf and got ready to cut it!
  5. Setting up and using the ShopBot
  6. Before starting the cutting, we had to set up the physical board and set up the software and trace routes. For the board, we screwed the plywood onto a the base (which had a sacrificial layer for accidental deep cuts). For the drill bit, we used a down-cutting 1/4inch bit. I learned that the drill should only drill down to a depth less than or equal to the width of the bit, meaning that for each full cut, the drill would trace over the path twice. For the computer side of the set-up, we imported our files onto the path carving software used by the ShopBot, and arranged the traces onto the board. All the cuts had to be closed loops, to make sure the bit would follow a reasonable path. Then, we set the X-Y origin and did a dry run to make sure no funny business was going on. Using the metal plate and the bit to complete a circuit, we set the Z-axis as well. I thought this was a really cool concept! We cut out some trial pieces to make sure everything was in order, and I got a chance to cut out both my support pieces: I decided to use the second one because it was quicker to cut and easier to sand/clean (although now I wish I had used the first one because it's more fun-looking and unique.) These pieces looked alright, so we went ahead and made more paths and finished cutting out everything.
  7. Assembly
  8. Lastly, I had to make it ready to go in my room. The OSB wood itself isn't too ugly (I like the hodgepodge pattern), but it does look cheap and wouldn't match my room. After much debate (this might've been the hardest part), I chose to paint it white. The plan is to screw the flat board to the supports, and then the supports to the wall. I plan to do it later in the week.