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Change print start sequence?


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Posted (edited) · Change print start sequence?

Right now when starting a print cura heats up to full print temp, then starts auto levelling, then starts print. This results in loss of filament due to the filament drooping from the nozzle. Is there a way to do it like PrusaSlicer does? Prime nozzle to 120° > start autolevelling sequence > Raise nozzle a little and move nozzle to X-Y home for nozzle prime line > raise temp to desired print temp > print prime line > start print?

 

That way no filament drooping occurs as the nozzle doesn't reach full temp until AFTER it went through the Autolevelling sequence (BLTouch)

Edited by Ch3vr0n
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    Posted · Change print start sequence?

    The commands are in your start gcode.  Something like this would do it.  It is the order of the commands and the use of keywords that are important.

    M104 S120

    M140 S60

    M109 S120

    M190 S60

    G28 X Y

    G29

    M109 S{material_print_temperature_layer_0}

    M190 S{material_bed_temperature_layer_0}

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    • 3 weeks later...
    Posted (edited) · Change print start sequence?

    Sorry totally forgot about this cause i didn't get any notifications (despite being subbed). Where do i enter this? Under machine settings. Currently using the default start and end g-code

     

    Quote

     

    [start]

    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

    G29 ;Auto bed Level

     

    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

     

     

    Quote

     

    [end]

    G91 ;Relative positioning

    G1 E-2 F2700 ;Retract a bit

    G1 E-2 Z0.2 F2400 ;Retract and raise Z

    G1 X5 Y5 F3000 ;Wipe out

    G1 Z10 ;Raise Z more

    G90 ;Absolute positioning

     

    G1 X0 Y{machine_depth} ;Present print

    M106 S0 ;Turn-off fan

    M104 S0 ;Turn-off hotend

    M140 S0 ;Turn-off bed

     

    M84 X Y E ;Disable all steppers but Z

     

     

    while doing some research, shouldn't M109 (wait for hotend temperature) be used in combo with M104 (set hotend temperature), i can read but understanding things is a different matter

     

    Edited by Ch3vr0n
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