First Instructables project by Neil Ricamata, Vandan Patel, and Sean Martinez for the STEM Practicum senior class at the Keller Center for Advanced Learning (KCAL).

Materials Needed:

2'x4' 1/4" sheet of wood
3D filament
Vex Screws
2' long 1.125" Diameter Dowel Rod

Tools Needed:

Laser Cutter
3D Printer
3D modeling software
Drill and Drill Bits
Allen Wrench
Sand Paper
Adobe Illustrator (for the laser cutter)
Miter Saw

Step 1: 3-D Models

We created the joints to connect all the triangles in Inventor.

The first joint was for the top piece of the Probability Hammer.
After that was done we cut the initial joint for the rest of the joints to save filament.
Thereafter, we created the joint that would go around the 1 1/8 inch dowel.
The diameter for the holes were 0.160 inches and extruded all the way through.
Then, we started to 3-D print these joints. We printed 1 Top joint, 1 Dowel joint and 10 of the “B” joints.

Step 2: Probability Triangles

After those designs, we created 5-inch equilateral triangles in Adobe Illustrator. So, then we can easily transfer them to the Laser Printer Program.

We started to Laser Print the triangles.
We printed triangles like this leading up to the #20.

Step 3: Putting It Together

Once the pieces are done we started to assemble the Dice.

If you want you can make it exactly the way of a 20 sided dice, use the template located on top to number your dice.
Make sure to drill holes in the triangles to match up the 3D models
Make sure to put the joints in order (Biggest joint goes at the top of the dice & the one with the hole goes at the bottom)
For the dowel joint make sure cut the triangles and sand it down to smoothly place onto the dowel.