Strange behaviour of Cura 4.13.1 (and also older versions)

[Brumil 0]

Hello

First, my system data:
Printer: AnyCubic Mega S Serie 1, Marlin 2.0
Octoprint with RaspI3b
Slicer: Cura 4.13.1

 

I have the following behavior on my system:

- I drew a cuboid (edge length 35mm, height 15mm) and exported it as STL

- loaded into Cura and sliced with the following settings: wall: 1, top:0, bottom 2, infill:0%, so the result is a shell without a lid, with wall thickness 1 (nozzle is 0.6mm), all speeds are at 100mm /s (don't worry, I don't really want to print with this).

- Printed (at a speed of 60mm), base plate starts like crazy, from layer 2 the printer falls asleep.

- Looked at G-code in text editor and found the following code:

;LAYER:10 ; Only an example, is for all layers >3
M205 X8 Y8
;TYPE:WALL-OUTER
;MESHingle_wall_box.stl
G1 F778.2 X117.492 Y127.2 E316.62785 ; print speed should be 6000!?
G1 X92.466 Y127.199 E317.8764
G1 X91.896 Y127.161 E317.9049
(...)

G1 F1535.1 X117.474 Y126.6 E366.66341; 2 walls 25,6mm/s
G1 F2268.6 X117.435 Y126 E377.49149 ; 3 walls 37,81 mm/s
G1 F2982.2 X92.549 Y125.399 E389.27574; 4 walls 49,7 mm/s
G1 F6000 X93.2 Y121.8 E1161.66962 ; 10 walls 100mm/s

Slicing again with one wall, but increasing the infill

G1 F2114.9 X117.492 Y127.2 E391.85053 ; 10% Infill
G1 F3323.2 X117.491 Y127.2 E443.19031 ; 20% Infill
G1 F4676.3 X117.491 Y127.2 E474.05769 ; 30% Infill
G1 F5779.3 X117.491 Y127.2 E486.18709 ; 40% Infill
G1 F6000 X117.491 Y127.2 E533.95532 ; ab 50% infill

Same thing, with "vase" mode:

;LAYER:10
;TYPE:WALL-OUTER
;MESHingle_wall_box.stl
G1 F777 X89.088 Y94.269 Z2.201 E322.83159
G1 X89.525 Y93.861 Z2.202 E322.86142
G1 X90.011 Y93.515 Z2.203 E322.89118

What happens here? I tried to print it at constant 100mm/s but I failed... Expecting all FXXX to be F6000. Any ideas?
 

[Brumil 0]

Solved! The Time per layer in the colling section was too long and slowed down everything.