For my most recent project, I decided to take care of the temperature problems my 3D printer has been having lately. A HUGE problem when I’m trying to print is the warping you can see on one of my previous posts for a lot of my models. Making a climate controlled box is probably the best things I can do for it.

I started with some plywood and hardware from Home Depot, along with a few dreams. I cut all of the appropriate panels at the Hangar, our free machine shop at Cal Poly, which is (shout out!) a great place to go that’s open for all students. Any major can get a “Red Tag”, which allows you to use 70% of the tools there absolutely for free! After I was done there, I lined up all the panels around my printer to make sure things would fit:

After that, I bought some fasteners from home depot and put it all together with a little help from my sister! She mostly held things in place, and we only drilled a couple wrong holes before we got the thing together.

 

After this, I went to Cal Poly’s E-surplus (another shout out!). These guys have figuratively pallets of junk that you can take for free. All of the electronics are non-functional, but odds are if you take just one part out of a device, it won’t be the part that was broken. Just be safe! So I found this broken Keurig Coffee machine and decided that its water boiler would be my heating element. I had quite a bit of fun taking it apart!

Here is its heart:

Next I just had to interface the heater with the Arduino. The way I achieved this was by coupling a servo motor to a household dimmer switch knob, like one you would use with your lights.

After that, I coded the Arduino coupled with an LCD shield and buttons to give it an interface. Here is the readout when it’s running at full blast:

And finally, I have some temperature graphs of it going up in heat, and staying the same once it reaches stasis. (The blue line is about what the ambient temperature is at a given time.)

Overall, this was a really fun project. I may get to repeat it for a family friend’s printer this summer, and I’m excited to see what the next step will be in this project!

Achievements:

• First woodworking project was successful with minimal help
• Finished final project for CPE 329, a class that I had gotten into despite not having the prerequisites yet

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Lessons:

• Electric wiring safety and short circuit protection (I had a close call with the 120 V outlet)
• How to use the table saw at Cal Poly’s machine shop
• General use of fasteners, and building with braces and hinges
• Arduino interface programming skill improved

Goodies earned

• Better quality 3D prints
• A box that I can proudly say I made myself
• Better protection for my 3D printer
• Half of a toaster oven

Thanks for reading!

-AH