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gcode increases the e-step auomatically


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Posted · gcode increases the e-step auomatically

I have this issue where by gcode generated on Cura increases the e-step auomatically. Happened from version 4.7 onward. Right now I'm on v4.11beta. Any help would be appreciated. 


;Filament used: 1.09502m
;Layer height: 0.2
;Generated with Cura_SteamEngine 4.11.0-BETA
M140 S50
M190 S50
M104 S200
M109 S200
M82 ;absolute extrusion mode
M201 X500.00 Y500.00 Z100.00 E5000.00 ;Setup machine max acceleration
M203 X500.00 Y500.00 Z10.00 E50.00 ;Setup machine max feedrate
M204 P500.00 R1000.00 T500.00 ;Setup Print/Retract/Travel acceleration
M205 X8.00 Y8.00 Z0.40 E5.00 ;Setup Jerk
M220 S100 ;Reset Feedrate
M221 S100 ;Reset Flowrate

G28 ;Home

G92 E0 ;Reset Extruder
G1 Z2.0 F3000 ;Move Z Axis up
G1 X10.1 Y20 Z0.28 F5000.0 ;Move to start position
G1 X10.1 Y200.0 Z0.28 F1500.0 E15 ;Draw the first line
G1 X10.4 Y200.0 Z0.28 F5000.0 ;Move to side a little
G1 X10.4 Y20 Z0.28 F1500.0 E30 ;Draw the second line
G92 E0 ;Reset Extruder
G1 Z2.0 F3000 ;Move Z Axis up

G92 E0
G92 E0
G1 F2700 E-5
G0 F6000 X137.872 Y138.074 Z0.2
G1 F2700 E0
G1 F1200 X138.161 Y137.786 E0.01357
G1 X138.837 Y137.167 E0.04406
G1 X139.168 Y136.888 E0.05845
G1 X139.891 Y136.328 E0.08887
G1 X140.287 Y136.047 E0.10502
G1 X140.649 Y135.801 E0.11958
G1 X140.956 Y135.601 E0.13176
G1 X141.691 Y135.162 E0.16024
G1 X142.118 Y134.929 E0.17642
G1 X142.966 Y134.513 E0.20783
G1 X143.52 Y134.272 E0.22793
G1 X143.631 Y134.226 E0.23192
G1 X144.421 Y133.934 E0.25994
G1 X144.696 Y133.844 E0.26956
G1 X145.093 Y133.722 E0.28338
G1 X145.677 Y133.555 E0.30358
G1 X146.611 Y133.331 E0.33552
G1 X146.766 Y133.301 E0.34077
G1 X147.095 Y133.243 E0.35189
G1 X147.354 Y133.201 E0.36061
G1 X147.74 Y133.145 E0.37359
G1 X148.002 Y133.112 E0.38237
G1 X148.759 Y133.043 E0.40765
G1 X149.417 Y133.006 E0.42957
G1 X149.903 Y132.99 E0.44574
G1 X150.797 Y133.011 E0.47549
G1 X151.327 Y133.045 E0.49315
G1 X151.696 Y133.074 E0.50546
G1 X151.798 Y133.084 E0.50887
G1 X152.745 Y133.219 E0.54069
G1 X153.414 Y133.344 E0.56332
G1 X154.472 Y133.596 E0.5995
G1 X154.997 Y133.749 E0.61768
G1 X155.758 Y134.002 E0.64436


Cura 4.11beta

Mac Big Sur 11.5



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    Posted · gcode increases the e-step auomatically

    I don't understand.  That looks like normal Gcode generated in Absolute Extrusion mode and there is an M82 telling the printer to use Absolute Extrusion mode.  E-Steps are defined in M92 and there isn't one in the snippet.

    If you want to use Relative Extrusion mode then that setting is in Cura Special Modes and an M83 should appear after your startup gcode.

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    Posted · gcode increases the e-step auomatically


    It looks like the standard start script for Creality printers.


    Creality is known to modify the firmware of their printers in undocumented ways - so we don't know what exactly happens if a print is started. 🤷‍♂️



    Anyone can modify the start script in Cura (machine settings) to his likings.

    You can take a look at the Windows or Linux version of the Creality slicer for comparison (Creality doesn't offer a Mac-Version of their own slicer)



    If you - for example - don't like these "Reset Feedrate" / "Reset Flowrate" things in the start script - you can remove or change these lines.

    Marlin G-codes are well documented, but keep chapter B) in mind... 🙂   https://marlinfw.org/meta/gcode/


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