Mechanical Filament Runout Sensor for Prusa MK2, MK2S

New version of the filament sensor from NSGrimace using the snap-on design from CNCKitchen. As optical sensors usually have problems with translucent and transparent filaments, a mechanical microswitch is a good solution to reliably check for the filament.

I wanted the sensor to be as small as possible without using screws. I added several improvements to the design:

• The housing does not touch the standard idler

• Screwless cover and microswitch mounting
  The switch is monitored by Octoprint/OctoPi using the Filament_sensor_reloaded plugin. https://plugins.octoprint.org/plugins/filament\_sensor\_reloaded/

  Important: The actuation point might differ for different microswitches. You can solve this by moving the mounting rods accordingly.

  Try it and leave some feedback :-)

  Happy Printing!

Print instructions

Category: 3D Printer Accessories Print Settings

Printer Brand: Prusa

Printer: i3 MK2S

Rafts: No

Supports: No

Resolution: 0.15 mm

Infill: 16 %

Notes:

Printed in PETG