Hi Greg. I think I've discovered what my issue is. The cooling fan is cooling the nozzle down too much, and that stops the print since the heater cannot get the nozzle back to 250°. I did wonder why it had got further inside my enclosure before stopping instead of the making one lap and stopping now I've opened the enclosure door........
The reason I want cooling on is that I get awfully lumpy ABS prints when making a large surface area part and the nozzle ends up dragging across the surface and has caused layer shifts where the belts has jumped when the nozzle can't get past.
But now I'm thinking cooling won't help since the previous layers are already hard enough to make the nozzle bump along.
I've replaced my start and end gcode with yours and will try pulling back on the flow rate compensator to see if that helps with the lumpy top surface issues.....
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GregValiant 1,455
Post your gcode print file that is stopping. (Did you notice if the hot end shut off?)
The start and end gcodes for the Anycubic printers are a bit odd. I would change the startup gcode to this:
; StartUp Gcode
G21 ;metric values
G90 ;absolute positioning
M82 ;absolute extrusion
M106 S0 ;cooling fan off
M140 S{material_bed_temperature_layer_0} ;Start to heat the bed
M104 S{material_print_temperature_layer_0} ;Start to heat the hot end
M190 S{material_bed_temperature_layer_0} ;Wait for the bed
M109 S{material_print_temperature_layer_0} ;Wait for the hot end
G28 ;Auto-Home X Y Z
;G29 ;No ABL
G1 Z15.0 F600 ;move the platform down 15mm
G92 E0 ;zero the extruded length
G1 F200 E5 ;extrude 3mm of feed stock
G92 E0 ;zero the extruded length again
M117 Printing...
; End of StartUp Gcode
I would change the Ending Gcode to this:
; Ending Gcode
G91 ;relative positioning
M83 ;relative extrusion
G1 E-1 F600 ;retract the filament a bit before lifting the nozzle, to release some of the pressure
G1 Z0.5 E-5 ;move Z up a bit and retract filament even more
G1 X5 Y5 F3000 ;Wipeout move
G1 Z5 F600 ;move the nozzle up from the print
G1 X0 Y{machine_depth} F6000 ;Move the nozzle to the left rear
M106 S0 ;Turn off the layer cooling fan
M104 S0 ; turn off extruder
M140 S0 ; turn off bed
M84 X Y E ;steppers off except Z
G90 ;absolute positioning
M82 ;absolute extrusion
M300 P300 S4000 ;Beep
; End of Ending Gcode
I see in the definition file for you printer that the last line of the StartUp Gcode is indeed "G5". MarlinFW lists that command as "Bezier Curve". Since your printer has Marlin firmware I'm thinking that command doesn't belong in there. You can always add it again if there is a problem with the above StartUp code.
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