3D Guardian

thingiverse

Human: 3D Guardian is an ultimate 3D printer fire prevention device that comes packed with some impressive extras. The primary function of 3D Guardian is to constantly monitor the printer's environment, and if it detects any movement beyond its trained range, it shuts down the printer (sounding a loud alarm). In addition to traditional sensors like temperature, smoke, and CO, it boasts a unique feature - a heated bed resistance sensor that continuously monitors the voltage and current of the heated bed wiring. Problems with this wiring (such as bad connectors or broken wires) are probably the most common cause of 3D printer fires; these issues will manifest themselves as an increased bed wiring resistance, and the printer will be automatically shut down well before the actual fire starts. The secondary function of 3D Guardian is to control the exhaust system of the printer's enclosure. This includes operating the air inlet and outlet (using stepper motors) and PWM control of the exhaust fan. The device can be operated directly from a 5-keys keypad and a 2x16 LCD screen, or via WiFi from a smartphone. It uses standard smart home frameworks like MQTT and OpenHAB, making it easy to integrate into your existing smart home setup. Some experience with DIY electronics is required for this project. The printable parts include the control unit (3d_guardian_top, 3d_guardian_bottom, one red_button, and five copies of the black_button) and the power unit (Power_unit_top, Power_unit_bottom, Power_unit_part). Both original SketchUp files and STL files are provided. I printed everything in ABS with 100% infill and 0.2 mm layers. Full details (including the user guide) can be found here: http://pulsar124.wikia.com/wiki/3D_Guardian