Hi Greg,
thank you for advice. I am not using SD card. I control printer from Pronterface. I also try same print made by Creality 1.2.3 slicer and this prints always fine. There must be some parameter or something behind that Cura makes differently.
I just tried to print another things and one time it printed whole thing, the other one snapped the filament again. I checked and it was broken cca 7cm from the sensor. I made slice with Creality slicer now and comparing - see attached files. The one with CCR1 is from Cura, the other one Creality.
There is end gcode in both of them so this is not a problem.
But in Creality there are commands for example
;TYPE:WALL-INNER
G1 F3000 X222.070 Y208.776 E90.11341
G1 X291.224 Y277.930 E91.73980
G1 X277.930 Y291.224 E92.05246
G1 X208.776 Y222.070 E93.67885
G0 F4200 X208.210 Y222.070
;TYPE:WALL-OUTER
G1 F3000 X222.070 Y208.210 E94.00482
G1 X291.790 Y277.930 E95.64453
G1 X277.930 Y291.790 E95.97049
G1 X208.210 Y222.070 E97.61020
G0 F4200 X209.157 Y221.885
while in Cura there is
;TYPE:WALL-OUTER
G1 F1500 X200.7 Y259.8 E101.65961
G1 X200.7 Y240.2 E102.01262
G1 X299.3 Y240.2 E103.78844
G1 X299.3 Y259.8 E104.14144
G0 F7500 X298.9 Y259.8
G0 X298.86 Y259.36
G0 X298.9 Y259.4
;TYPE:WALL-INNER
G1 F1500 X201.1 Y259.4 E105.99556
G1 X201.1 Y240.6 E106.35198
G1 X298.9 Y240.6 E108.2061
G1 X298.9 Y259.4 E108.56251
G0 F7500 X298.51 Y259.01
The difference is F3000 and F4200 from Creality and F1500 and F7500 from Cura, which I dont know what it means (I didnt learn the commands yet). There are 184 layers in Creality and 183 in Cura.
It might be that the filemant is too old? I got it from person who doesnt want the printer any more, and it might be 2 years old. But it never fail when sliced by Creality, this is strange.
I have it in basement, but I increased heat for nozzle to 210 degrees and bed to 75, and it is sticing fine. Actually there is no problem with first layers, only when it gets higher, but not same height every time. Sometimes it is 1cm and like yesterday it was after printing few milimiters.
CCR1_Incredible Wolt.gcode
Incredible Wolt.gcode