Filament In-Line Measurement System for 3D Printers

• Make a stand-alone solution which measures the cross-sectional area of filament as it is fed into your existing 3D printer
• Run on a Raspberry Pi zero or cheaper
• Interface with as many firmwares as possible by only passing a percent change value to the printer over i2c or serial
• Keep the cost as low as possible
• Throw filament runout detection in there for free

• Photo-Multigraph like mirror and camera setup.
  • Maybe just multiple of the cheapest cameras I can source instead.
• Running the filament between latex sheets with a capacitive coating and sensor on the outside of the latex.
• piezo air pump and pressure sensor
• a series of ring magnets with hal effect ICs

• If you have any ideas or suggestions, please open an issue.
• Donate time or money to The Open Source Appliance Foundation
  • We (well technically I) don't need funding for this project but any donations will go towards the development of other open source appliances.