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How can I make startup GCode that depends on the nozzle diameter?


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Posted (edited) · How can I make startup GCode that depends on the nozzle diameter?

Hi everyone. I've tried looking in the online guides for this but I can't seem to find anything. I'm using Klipper firmware and I want to set the pressure advance based on the nozzle diameter. Is that something I can do in Cura? Basically what I need is a case statement, or if-then-else. The gcode I need to add is:

 

SET_PRESSURE_ADVANCE ADVANCE=n.nnn

For a 0.4mm nozzle the value should be 0.153, for a 0.2mm nozzle it's 0.250, etc. The values are determined by printing a calibration tower and they are different for every nozzle size and in some cases per filament. In Prusa Slicer I've done it like this:

{if nozzle_diameter[0] == 0.2} SET_PRESSURE_ADVANCE ADVANCE=0.250
{elsif nozzle_diameter[0] == 0.4} SET_PRESSURE_ADVANCE ADVANCE=0.153
{endif}

I imagine there must be some similar technique in Cura, Can anyone point me to the right documentation or an example, please?

Edited by NameOfTheDragon
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    Posted · How can I make startup GCode that depends on the nozzle diameter?

    Use the Linear Advance Setting plugin (from the Marketplace) to set your linear advance factor in profiles. Then - since you seem to be using Klipper), add this gcode macro to your printer.cfg:

    [gcode_macro m900]
    default_parameter_K: 0
    gcode:
      SET_PRESSURE_ADVANCE ADVANCE={K}

     

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