Tarantula Pro Filament Run Out Switch

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Changes 09/09/2019 Switch turned completely around (180 degrees) Switch position adjusted accordingly. Filament hole now tapered instead of straight parallel hole Height of switch modified for optimal performance Hole added for cable tie attachment Attachment holes incorporated for micro switch installation Micro Switch tip bent over at approximately 45 degrees, a distance of about 1-5 mm. The primary objective of these modifications is to simplify the process of feeding and retracting filament. --------------------------------------------------------------------------------------------------- Tevo Tarantula Pro Filament Run Out Switch Mounting Block. Connect the normally open contacts of the micro switch to Servos2 D4 and Gnd pins. Add the following lines into Marlin and compile then flash your board (assuming it is the stock MKS GEN L board). File - pins_MKS_GEN_L.h #ifndef FIL_RUNOUT_PIN #define FIL_RUNOUT_PIN 4 #endif Change the lines in File - Configuration.h: Uncomment (remove the //) from the lines: #define FILAMENT_RUNOUT_SENSOR #define NOZZLE_PARK_FEATURE File- Configuration_adv.h Uncomment the line: #define ADVANCED_PAUSE_FEATURE The system will now automatically detect when the switch is open, indicating that the filament has run out. When the switch is operated, the system halts and the head goes into a park position. The filament retracts about 100mm and the display notifies you to remove the existing filament and replace it. After replacing the filament, the hot end heats back to the set temperature and extrudes a length of filament to clear the nozzle. You then press the switch and printing resumes. To implement a 'Change Filament' function switch, wire an additional switch's NC contacts in parallel with the filament runout switch. Operating the 'Change Filament' switch pauses the print, retracts the nozzle away from the print area, retracts the filament, and waits for the filament to be changed.