Cura/resources/extruders/koonovo_kn3_extruder_0.def.json

{
    "version": 2,
    "name": "Left Extruder",
    "inherits": "fdmextruder",
    "metadata": {
        "machine": "koonovo_kn3",
        "position": "0"
    },

    "overrides": {
        "extruder_nr": { 
	  "default_value": 0 

	},
        "machine_nozzle_offset_x": { "default_value": 0.0 },
        "machine_nozzle_offset_y": { "default_value": 0.0 },
        "machine_nozzle_size": { "default_value": 0.4},
        "material_diameter": { "default_value": 1.75 }
	    
    }
}