Filament Minder (Original Creality Mount)
thingiverse
<b>Spool Holder: </b> A trio of parts that will allow you to suspend your spool on a 80x12.7x12.7mm load cell for processing remaining filament in an Arduino MCU with an OLED display and interface buttons. This was designed to fit into the stock Ender 3 bracket in place of the hollow filament holder, and for the load cell to be attached to both bracket and spool with the appropriate M4/M5 hardware for the load cell. I printed the bracket at 100% infill, as it will be supporting the entire weight of the system, but that may be overkill. You're welcome to experiment. The rest I printed at a lower, but still pretty high, infill. I tend to overbuild things, as you can probably tell from this design. The spool holder is designed to take 4 10mmOD x 5mmID bearings for the spool to roll upon, and should press fit into place with little trouble. If they are too loose and threaten to fall off, a little dab of adhesive on the inner race should secure them in place. <b>Interface Panel:</b> I have recently completely redesigned the interface panel. The inside is now constructed with a proper perfboard installation, and the Nano, buzzer, HX711, and micro tac switches are soldered to the board, along with the requisite I2C pullup and button pulldown resistors. <a href="https://www.banggood.com/ATmega328P-Nano-V3-Controller-Board-Compatible-Arduino-p-940937.html">Arduino Nano</a> <a href="https://www.banggood.com/10kg-Aluminium-Alloy-Small-Scale-Weighing-Pressure-Sensor-With-HX711-AD-Module-p-1129369.html">10kg Load Cell and HX711 Amplifier</a> <a href="https://www.banggood.com/0_96-Inch-4Pin-White-IIC-I2C-OLED-Display-Module-12864-LED-For-Arduino-p-958196.html">0.96" I2C OLED</a> <a href="https://www.banggood.com/40pcs-FR-4-Double-Side-Prototype-PCB-Printed-Circuit-Board-p-995732.html">Perfboards</a> <b>Software:</b> https://github.com/SeanTheITGuy/filament_minder This is a functional, but potentially not complete, version of the Filament Minder software. Instructions for use are on the Github readme.
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