This project shows how to make a 3D printed maze, with a captivated (trapped) ball bearing.
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Step 1: Run the Code
You can run the maze_generation.m in MATLAB (or convert to your own favorite language). Select the number of spaces in the square maze at line 17, and the ball bearing diameter at line 20.
Step 2: Copy and Paste to OpenSCAD
Once the script has run, copy the command window text over to OpenSCAD.
Step 3: OpenSCAD
View the output in OpenSCAD. Then render (press F6), and save the STL file.
Step 4: Setup for Your 3D Printer
Take the STL file into your slicer software, and prepare the GCODE for your 3D printer.
Here are my settings for my 3D printer...
0.2 mm layer height
1.2 mm infill line width
2 mm wall thickness
1.2 mm top/bottom thickness
Infill density 20%
Printing temp, 205 Build plate, 60 Diameter 1.75 mm Flow 100% Enable retraction
Print speed 40 mm / s Travel speed 90 mm / s
Enable print cooling
Printer 120mm/120mm/120mm Heating bed Gcode flavor Marlin
Nozzle size 0.4 mm 1.75 mm material diameter
Step 5: 3D Print the Maze...and Be Ready Part Way Along
As you print the maze, once the walls are taller than the ball bearing, drop the ball bearing into the maze
Step 6: Play With the Maze
Here is a completed print. This one was printed with regular purple for the bottom layers, and then glow-in-the-dark for the top layers.
Assuming you picked a regular steel ball bearing, you can also use a fridge magnet to move the bearing around the maze.
This is an entry in the
Made with Math Contest