Extruder feeder with alternative runout

thingiverse

**Edit: Consider using this newer version instead: https://www.thingiverse.com/thing:3800883 (which doesn't require reversing the stepper motor's wires anymore.)** ==================== **(Note: This design inverts the motor, so you must reverse the plug or adjust your firmware settings, see below.)** --- **Warning:** With this design, the motor is inverted. You'll need to reverse the plug or adjust the settings in your firmware (see below). My custom extruder feeder has been designed with several key features: - It's usable with any 1.75 filament, including flexible ones. - The design is discreet and not "cheap" like the default extruder feeder. - A place for a better runout sensor switch has been included. - A cover protects the motor axis from dust. - The feeder is easily openable for maintenance. The feeder consists of 3 main parts and 4 small ones. I've included an STL file with all-in-one settings if you prefer not to manage different settings for each part. You'll need to reuse your default extruder feeder's spring, ball bearing, and 4 screws. Additionally, you'll need to add a runout sensor switch and a plug where the default runout cable can be connected (or weld directly if preferred). I suggest using thin wires as there is space for them. I'm currently using this type of microswitch: https://images-na.ssl-images-amazon.com/images/I/71hJwrQbcuL._SL1200_.jpg You can find all dimensions in the FreeCAD file if you want to check. I printed it at 0.2 on my U30 with an old and cheap black filament, using supports activated. You may need to spend some time removing printing defects with a precision knife and sanding some parts. A tip is to cut a thin strip of sandpaper, roll it into a small tube, place it in the hole for the filament, and clean it with this "tool". FreeCAD: Note that I'm a beginner on FreeCAD (about 1 month experience), and my computer is quite old (2009). The source FCStd file may not be perfect or heavy due to my limited experience. Feel free to clean the file and send me a better version. Remixes: I share all my designs under the default license, so you can modify what you want. However, I'd appreciate it if you mentioned the original design if you make any modifications. If you like this piece, please share it and leave a comment.