Here's a cool 3D printing project. In this instructables, I'll show you how I made an awesome puzzle pen using 3D printing.
3D Printer: Dremel
Modeling Application: 123D Design Desktop ( get from: http://www.123dapp.com/design )
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Step 1: Draft the Design
Draw out the draft design and puzzle pieces.
Step 2: Modeling
Modeling the pieces in 123D Design Desktop following you design draft.
Note: You must design the teeth using same dimension. And test the clearance, 0.1mm maybe so tight, it is so hard to pull out the pieces for me. So, I used 0.2mm clearance, it is easy to pull out.
Step 3: Print Out
Print them out. According to the length of the cartridge, print body pieces repeatedly. You also can print with different colors.
Step 4: Assembling
Complete the puzzle by assembling all the pieces.