Retracting filament after completed print
Can someone help me out with the gcode to have the printer and 3DCh completely retract the filament back to the start position after a print is complete? I don't know if a portion of the gcode from the gcode generator can be used for this function. I don't know prusa well at all so I'm not sure where to put it even if I had the code. End gcode perhaps?
254 Views
Here is my end gcode from Prusa slicer. It has a fair ammount of descpritions for what is going on. I kept the standard end gcode for the printer profile and added a 6 pulse button press (retract filament and zero) plus retraction time. you will need to adjust your button location and retraction times for your setup. ; Begin End G-Code
; Ensure the print head is raised before starting unload sequence
{if max_layer_z < max_print_height}G1 Z{z_offset+min(max_layer_z+2, max_print_height)} F600 ; Move print head up{endif}
; Perform Tip Shaping V2 before unloading
; <<< Start Of Tip Shaping V2 >>>
G92 E0 ; Zero the extruder
G1 E10 F500; push out the molten filament
G1 E-15 F4000; quickly retract
G1 E-10 F150; slowly retract
G1 E-60 F4000; quickly retract
G92 E0 ; Reset extruder position
; <<< End Of Tip Shaping V2 >>>
; Start 3D Chameleon unloading and zeroing sequence
G0 Y234 F2000 ; Move to button position to initiate unload and zero
G4 P2750 ; Hold button for 6 pulses, each pulse 0.5 seconds, total 3 seconds for unload and zero I reduced the P a bit to ensure we don't hit 7 pulses which is a zero only command.
G0 Y231 F2000 ; Move back to standby position
; Pause before initiating return sequence
G4 P1000 ; Pause for 1 second to allow all processes to complete
; Activate the button for 7 seconds to back the filament to its starting point
G0 Y234 F2000 ; Press button again to start filament return
G4 P7000 ; Hold button for 7 seconds to ensure filament is fully retracted
G0 Y231 F2000 ; Return to standby position
; Short pause to ensure all operations have ceased before moving the bed forward
G4 P500 ; Pause for 0.5 seconds
; Now, move the bed forward to present the print
G1 X5 Y{print_bed_max[1]*0.85} F{travel_speed*60} ; Present print
{if max_layer_z < max_print_height-10}G1 Z{z_offset+min(max_layer_z+70, max_print_height-10)} F600 ; Move print head further up to clear any obstruction{endif}
{if max_layer_z < max_print_height*0.6}G1 Z{max_print_height*0.6} F600 ; Ensure print head is well clear of the print{endif}
; Turn off heaters, fan, and motors for final shutdown
M140 S0 ; Turn off heatbed
M104 S0 ; Turn off hot