Automated Plastic Grinder/Recycler[edit | edit source]

Project developed by [your name linked to your user account]

Abstract[edit | edit source]

  1. Paragraph description of the OSAT - why is it Appropriate? What need does it fulfil? Are there case studies you have found of a technology being used successfully?

There is a very large need for an affordable and strong 3D print part shredder. With current models on the market that are made from steel and require numerous parts and fittings costing upwards of $400, cheaper versions could be appealing to customers. We have created a mostly 3D printed shredder using a combination of PLA and Polycarbonate parts and a few other pieces of hardware. This design utilizes two hex shafts with 5 teeth per shaft, encased in a solid 3D printed box. The shaft is driven using a windshield wiper motor which is powered by an old computer power supply. This shredder design takes a lot of the guess work of tolerances and proper fits out of the equation.

  1. Picture of completed print using your printer
    Wood WorkingClamp Parts.png

Bill of Materials[edit | edit source]

  1. Provide a full BOM -- Materials needed for fabrication of device and alternative materials if they are not available, prices/sources of non-printable parts


  1. DeltaBot Athena II Printer
  2. PLA Filament
  3. Polycarbonate Filament
  4. Windshield wiper motor
  5. 12 Volt computer power supply
  6. 1- 6mm Wingnut
    1. Upload and link to all source files from open source CAD
    2. Upload and link to all STLs

Tools needed[edit | edit source]

  1. MOST Delta RepRap or similar RepRap 3-D printer
  2. Wire Strippers
  3. Adjustable Wrench
  4. Drill
  5. Drill Bit
  6. 6 Screws

Skills and knowledge needed[edit | edit source]

  1. Ability to run Cura or another Slicing program
  2. Operate Deltabot Athena II
  3. Ability to splice together positive and negative wires from motor to power supply

Technical Specifications and Assembly Instructions[edit | edit source]

  1. Provide directions for print/assembly - be detailed enough in your “how to” to ensure that someone could construct the device from your description. Consider the elegance of IKEA like instructions.
  2. Include print time estimate
  3. Include assembly time estimate
  4. Including drawings or pictures of the device at stage of assembly at minimum. (Upload)
  5. Consider video if appropriate
Example video summary of textbook

Common Problems and Solutions[edit | edit source]

  1. Overextrusion of polycarbonate pieces. With slight over extrusion, the parts are too big in some cases.
  2. Tolerancing of parts based on a different sized nozzle. With different sized nozzles, some parts may need to be scaled in order to make them fit.

Cost savings[edit | edit source]

The high cost part for this machine is currently the windshield wiper motor. Due to time constraints for this project, the motor was purchased on amazon for $45 but the cost of the overall machine can be decreased drastically if this part is found in a scrap yard.

Cost List

  1. PLA Filament = $20/roll (should need 1 roll)
  2. Polycarbonate = $40/roll (need less than a roll)
  3. Windshield wiper motor = $45
  4. Computer power supply = donation (most models $20-$40 for cheap ones)
  5. Wingnut = $1.50
  6. Find a commercial equivalent
  7. Calculate $ savings and % savings

We need to do cost analysis of actual weight.............

Benefited Internet Communities[edit | edit source]

  • Name and add links to at least 5 using single brackets around [url name]

References[edit | edit source]

  • The sources of information (e.g. engineering handbooks, journal articles, government documents, webpages, books, magazine articles etc.). References should use the <ref> </ref> and {{Reflist}} tags and can be in any format but should include all the information necessary for someone else to find the same information you did. For example: [1]
  1. web page: Department of Energy (DOE) Landscaping and Energy Efficiency, DOE/GO-10095 (1995) Available:

Based on the developmental needs addressed (e.g. food, heat, electricity, clean water, health care, etc.) be sure to label your device in the proper categories e.g. use [[Category:Water]]. Be sure to categorize your device so that it will be easy to find – for example “Low voltage connection basics” is categorized in [[Category:How tos]] [[Category:Electricity]] [[Category:Electric lighting]].