242 Big Money Project
The RepRap motto is "wealth without money" - for this assignment you are to create wealth by making an open source design that has value to you. It must be 3D printable on your Jellybox and cost less than a commercial equivalent (if such a thing exists).
Assignment[edit | edit source]
- Design something of "high value" that you can 3D print on your Jellybox
- Make sure someone else has not already done it - search http://www.yeggi.com/ and http://web.archive.org/web/20191229012720/http://www.yobi3d.com/
- Design 3D printable components with ANY CAD program but the use of OS CAD programs (e.g. OpenSCAD, FreeCAD, or Blender) earns extra credit points
- Create an account at http://libre3d.com/ or http://thingiverse.com/
- Upload your design under an OS license to http://libre3d.com/ or http://thingiverse.com/ - include: Source files, STLs, a picture, and a brief description including costs and $ savings (make sure you make the duration forever) If not using SCAD or Blender - upload your CAD model in a zip file.
- Add picture, link to your Libre3d or Thingiverse page with name, commercial equivalent link+cost, and economic savings to table below (see example).
- Print component and bring to class - Complete and due by last day of classes this semester
Grading[edit | edit source]
- 30% Print quality
- 20% Documentation
- 50% Design (design for printing, aesthetics and function)
Automatic reductions:
- 50% no source
- 10% per day for late
Table of Value[edit | edit source]
2023[edit | edit source]
| Digital Photo | Free Design / Link to Libre3D | Commercial Equivalent / Cost | Approximate Savings in US$ |
|---|---|---|---|
|
Bracelet Stand | $35.40 | Costs less than $0.06 worth of PLA and could retail for around $20. |
|
Cup Coaster | $10.00 | Costs less than $0.50 worth of PLA and could retail for around $3. |
|
Homerun Ball Stand | $14.99 | Costs around $0.37 each. Sold 13 for $5 each, profiting $62. Market price: $15–$20. |
 |
Chocolate Extruder | $179 for a commercial extruder. Printable extruder part (excluding syringe): $3 retail. Filament cost: $1, yielding a $2 profit. |
2019[edit | edit source]
| Digital Photo | Free Design / Link to Libre3D | Commercial Equivalent / Cost | Approximate Savings in US$ |
|---|---|---|---|
|
Phone Holder | Cost: approximately $3 to make; retail value: $10–$15 depending on availability | $7–$12 |
|
Chapel Ornament | $12.95 | Cost of ornament: $0.40; savings of at least 96% |
|
Gauge Holder | $28.70 | Roughly 86% savings |
|
Customized Checker Board and Checkers | $12.25 | Cost for PLA: $1.85; 85% savings |
|
Customized Photo Holder | $10.00 | 50% savings |
|
Principia Coaster | $0.75 each for 16 coasters | Cost: $0.46; 38% savings |
| Lightning Charger Cord Name Tag | $28.99 for 1 3D Printed Name Tag | Cost to manufacture: $0.09; 99.67% savings | |
  
|
Over Door Hook Rack | Commercial equivalent: $10–$25 [1] | Cost to manufacture: $1.50; roughly 10%–20% savings |
2018[edit | edit source]
| Digital Photo | Free Design / Link to Libre3D | Commercial Equivalent / Cost | Approximate Savings in US$ |
|---|---|---|---|
|
Xbox One Controller Stand | $11.25 (average cost) | Savings: ~$8.25 |
|
Desktop Drawer for 5.25 inch Drive Bay | $20.00 | Savings: ~$18.00 |
|
Hidden Outlet Wall Safe | Cost: $5–$20 (average: ~$10) | Savings: ~$10.00 |
|
Sharpie Marker Holder | Marker Holders, $15–$20 | Savings: ~$17.00 |
|
Bed Riser | $5–$22 | Savings: ~$15.00 |
|
MX Cherry OEM Profile Keycaps Library (OpenSCAD) | Commercial cost: $20–$40 (full set) | Printing cost for 104 keys: ~$5.20 (75% savings) |
2017[edit | edit source]
| Digital Photo | Free Design / Link to Libre3D | Commercial Equivalent / Cost | Approximate Savings in US$ |
|---|---|---|---|
|
Multi-Hanger Closet Organizer | $9.00 | Savings: ~$8.50 |
|
Acoustic Phone Holder | $50.00 | Savings: ~$45.00 |
|
iPad Pro and Apple Pencil Stand | $29.99 | Savings: ~$27.00 |
|
Flower Watering System | $15.90 | Savings: ~$14.00 |
|
Hair Tie Bracelet | $10.99 | Savings: ~$10.87 |
| Elf Ear Jewelry | $30–$40 | Savings: ~$38.00 |
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