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print shutdown

New Member Registered
Joined: 11 months ago
Posts: 1
Topic starter  

added the 20210313 Marlin firmware to my Ender 3 v2 and if I don't do a preheat pla before choosing a print, it will shut down the head heater and stop the print after a few minutes of printing.  I don't think it did this before I updated

Eminent Member Registered
Joined: 1 year ago
Posts: 42

This may be a slicer setting that's  missing. Marlin requires a hot-end pre-heat or the extruder won't run. ISTR the threshold is 160C.

It's usual to add it to your slicer settings, where (normally) the bed will heat first, then the hot-end kicks in and until the hot-end temperature is reached, printing won't start, not even the purge line.

I only pre-heat manually when I'm changing filament or calibrating.

You could try the following as your start-up code:

; Ender 3 Custom Start G-code
M140 S{material_bed_temperature_layer_0} ; Set Heat Bed temperature
M190 S{material_bed_temperature_layer_0} ; Wait for Heat Bed temperature
M104 S160; start warming extruder to 160
G28 ; Home all axes
G92 E0 ; Reset Extruder
M104 S{material_print_temperature_layer_0} ; Set Extruder temperature
G1 X0.1 Y20 Z0.3 F5000.0 ; Move to start position
M109 S{material_print_temperature_layer_0} ; Wait for Extruder temperature
; G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed
G1 X0.1 Y200.0 Z0.3 F1500.0 E15 ; Draw the first line
G1 X0.4 Y200.0 Z0.3 F5000.0 ; Move to side a little
G1 X0.4 Y20 Z0.3 F1500.0 E30 ; Draw the second line
G92 E0 ; Reset Extruder
G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed
; End of custom start GCode