Servo nozzle wiper for Flsun3D 2020

youmagine

This is how I tackled the issue of having to wait and manually remove the oozing filament from the nozzle every time printing starts. The servo holder is positioned as shown (Picture 2) so that the wiper can strike the center of the conical part of a nozzle (Picture 3) and then slide over the tip of the nozzle as it moves further. A 9g TowerPro SG90 servo is used in this design. Some additional 2mm screws for plastic are required: two countersunk to attach the servo holder, two round headed to attach a servo to the holder, one that comes with a servo arm, and one to attach the wiper to the servo arm. To implement this feature, you will need to modify your printer's Marlin firmware to enable one or more servos. You must define NUM_SERVOS in Configuration.h and SERVO_DELAY. You will also need to add code to your slicer software to perform the wiping action at the beginning of each print. For example: ; ... ; After the bed has heated up. ; ;--- Servo nozzle wiping --- G91 ; relative positioning G1 Z10 X30 F900 ; lift Z axis, move head away M400 ; wait to finish moves G90 ; absolute positioning M280 P0 S870 ; move servo back G28 X ; home x axis M280 P0 S2000 ; move servo forwards M280 P0 S870 ; move servo back G28 ; home all axes ;---