Filament Detector

thingiverse

Introduction: This is a fully functional Filament Detection/Run-Out Sensor Module, carefully designed and tested to ensure its optimal performance. This module can be seamlessly integrated into both Cartesian and Delta style 3D printers, placing it immediately before the extruder. The detection sensor is based on optical technology, eliminating the need for moving parts. An opto-endstop limit switch PCB is required, which can be easily sourced from online marketplaces like Amazon, Ebay, or Aliexpress. Two versions of this print are available: one with a M6 OC4 quick-fitting aperture (Cartesian) and another with only a 2mm aperture (Delta). Caveats: Although I have conducted extensive testing on this design, there is still room for improvement. The tiny filament guide requires precise tolerance to function correctly. Furthermore, clear or translucent filament will not be compatible with this module. Requirements: To assemble the Filament Detection/Run-Out Sensor Module, you will need an Opto PCB, four M3 cap screws with two nuts (pre-pressed into the mount), and two M3 T-nuts. A PC4-M6 Quick Fitting is required for Cartesian printers, along with a M6 1.0 tap. Delta printer users do not require these components. The module also necessitates a 3-pin JST connector and accompanying cable. Instructions: The design prints well in both .1mm and .2mm resolutions, producing satisfactory results. However, the IR Block is quite small and should be printed at the highest available resolution to ensure accuracy. Upon completion, verify that removing the filament produces a reading of less than 0.7V while the filament present yields a reading above 3.2V. Adjust the IR Block as necessary to achieve the correct measurements. Keep in mind that increasing the z-height of the guide will decrease the filament out signal (less than 0.7V) and increase the filament present reading (~4V). All measurements were taken using a 5VDC supply. Other Stuff: To simplify maintenance, I have designed a cover for this enclosure. However, be aware that routing the filament can be challenging, especially if there are bends in it. The Design Spark Mechanical source files are provided to enable community members to make modifications or improvements to the design.