Cura/resources/extruders/uni_extruder_2nd.def.json

{
    "version": 2,
    "name": "Extruder 2",
    "inherits": "fdmextruder",
    "metadata": {
		"machine": "uni_base",
        "position": "1"
    },

    "overrides": {
        "extruder_nr": { "default_value": 1, "maximum_value": "1" },
        "machine_nozzle_size": { "default_value": 0.4 },
        "material_diameter": { "default_value": 1.75 },
        "machine_nozzle_offset_x": { "default_value": 0.0 },
        "machine_nozzle_offset_y": { "default_value": 0.0 },
        "machine_extruder_start_code": 
           {
            "default_value": ";T1                             ;switch to extruder 2\n;G92 E0                      ;reset extruder distance\n;G1 F2000 E93           ;load filament\n;G92 E0                      ;reset extruder distance\n;M104 S{material_print_temperature}\n;\n"
           },
        "machine_extruder_end_code":
           {
            "default_value": ";G92 E0                       ;reset extruder distance\n;G1 F800 E-5               ;short retract\n;G1 F2400 X5 Y5         ;move near prime tower\n;G1 F2000 E-93           ;long retract for filament removal\n;G92 E0                       ;reset extruder distance\n;G90                            ;absolute coordinate\n;\n"
           }
    }
}