Move Nozzle Size Setting from "Machine Settings" to "Material"

[clemensk 0]

Hi,

 

on my Artisan the Nozzle setting is under machine setting. On my ender 3 the nozzle size could be changed where the material can be chosen. How hard is it to move this setting in Cura 5.6 with moderate changes on the snapmaker printer profile?

[Slashee_the_Cow 621]

TL;DR: Dual extruder printers store that setting by extruder, not by the machine settings.

 

Looking at all the machine definition files for Snapmaker machines (I don't know if there's one for your exact printer included or not) they don't define variants which have different nozzle sizes. That's what makes those appear. For example, here's the metadata section from my profile for my E3V3SE:

"metadata":
    {
        "visible": true,
        "author": "Slashee the Cow",
        "manufacturer": "Creality3D",
        "file_formats": "text/x-gcode",
        "quality_definition": "creality_base",
        "first_start_actions": [ "MachineSettingsAction" ],
        "has_machine_quality": true,
        "has_materials": true,
        "has_variants": true,
        "machine_extruder_trains": { "0": "creality_base_extruder_0" },
        "preferred_material": "generic_pla",
        "preferred_quality_type": "standard",
        "preferred_variant_name": "0.4mm Nozzle",
        "variants_name": "Nozzle Size"
    },

The important parts there are has_variants, preferred_variant_name (the default) and variants_name (the description for it that appears in Cura).

 

Here's the metadata section for a Snapmaker 2 A350 Dual Extruder:

"metadata":
    {
        "visible": true,
        "manufacturer": "Snapmaker",
        "file_formats": "text/x-gcode",
        "machine_extruder_trains":
        {
            "0": "snapmaker_dual_extruder_0",
            "1": "snapmaker_dual_extruder_1"
        },
        "quality_definition": "snapmaker2"
    },

No variants. That's because when we look at the definition file for one of the extruders:

{
    "version": 2,
    "name": "Extruder Left",
    "inherits": "fdmextruder",
    "metadata":
    {
        "machine": "snapmaker2_dual",
        "position": "0"
    },
    "overrides":
    {
        "extruder_nr":
        {
            "default_value": 0,
            "maximum_value": "1"
        },
        "machine_nozzle_size": { "default_value": 0.4 },
        "material_diameter": { "default_value": 1.75 }
    }
}

Each extruder has its own value for nozzle size.

 

I don't actually know if it's possible for extruders to define their own variants, but the variant files list the definition file they're for, and the few I've looked at all refer to printers, never extruders.