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zanppa/ender3neo_end_gcode.md

Last active October 25, 2025 11:09
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My start and end G-codes for Creality Ender 3 Neo used with Ultimaker Cura slicer
Raw
ender3neo_end_gcode.md 
G91 ; Relative positioning
G1 E-2 F2700 ; Retract a bit
G1 E-2 Z0.2 F2400 ; Retract and raise Z
G1 X5 Y5 F3000 ; Wipe out
G1 Z10 ; Raise Z more
G90 ; Absolute positioning

G1 X0 Y0 ; Present print
M104 S0 ; Turn-off hotend
M140 S0 ; Turn-off bed
M106 S0 ; Turn-off fan

M84 X Y E ; Disable all steppers but Z
Raw
ender3neo_start.md 
; Ender 3 Neo Custom Start G-code
M140 S{material_bed_temperature_layer_0} ; Start heating the bed
M104 S{material_standby_temperature} ; Start heating nozzle to lower temp to prevent oozing
M105 ; Report temperatures
G4 S10 ; Wait a little to allow warmup
M105 ; Report temperatures

; Home & bed leveling sequence
G28 ; Home all axes
G29 ; Auto bed leveling
G1 Z20 F1000 ; Move extruder up a bit
G1 X10.1 Y20 F1000.0 ; Move to start position

; Finish heating up
M190 S{material_bed_temperature_layer_0} ; Wait until target bed temperature reached
M105 ; Report temperatures
M109 S{material_print_temperature_layer_0} ; Wait until nozzle reaches target temperature
M105 ; Report temperatures

; Prepare the nozzle
M82 ; Absolute extrusion mode
G92 E0 ; Reset extruder
G1 Z0.28 F5000.0 ; Move to start position
G1 X10.1 Y200.0 Z0.28 F1500.0 E15 ; Draw the first line
G1 X10.6 Y200.0 Z0.28 F5000.0 ; Move to side a little
G1 X10.6 Y20 Z0.28 F1500.0 E30 ; Draw the second line
G92 E0 ; Reset extruder
G1 Z2.0 F3000 ; Move Z axis up little to prevent scratching of print bed
@Mobius-Prolix
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Mobius-Prolix commented Feb 23, 2025

After bed leveling the exturer goes to center of the bed and lowers down which tends to leave a blob of plastic there. I don't really understand why it does this, is it part of the bed leveling sequence? Maybe I need to lower the filament standby temperature to prevent the filament from oozing slightly during this...

Were you ever able to find a work around to this? My Ender 3 v2 Neo is doing the same thing after auto-leveling. Not easy to clean off by the time it moves. Sure is a strong little blob! lol

@zanppa
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zanppa commented Feb 25, 2025

Hi. I never found a way to prevent the nozzle from touching the center of the bed with the original firmware. However, I converter my printer to use Klipper with a Raspberry PI computer, and with that I don't have the problem anymore (and got bunch of other usefull features as well)...

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