open4neptune-new/CHANGES.md

📝 Changes for PRINT_START_NOCCI

🎯 Optimizations Applied (2026-03-12)

Key Changes in optimized_user_settings.cfg:

Line	Change	Reason
5	SET_GCODE_OFFSET Z=0 added	Reset Z-Offset before every print (Cartographer best practice)
9	G28 → CG28	Use Open4Neptune smart home command
10	CARTOGRAPHER_TOUCH_HOME added	Precise Z0 measurement with Cartographer sensor
35-36	Temp tolerance ±4-10°C → ±2°C	Tighter temperature control for consistent starts

Full Optimized Macro:

[gcode_macro PRINT_START_NOCCI]
gcode:
    #--- Setup & Reset ---
    M117 Setting up parameters...
    RESPOND MSG="Starting Print Sequence..."
    
    SET_GCODE_OFFSET Z=0                    ; ⭐ NEW: Reset Z-Offset for Cartographer
    G92 E0
    G90                                     ; Absolute positioning
    BED_MESH_CLEAR
    Frame_Light_ON
    Part_Light_ON
    
    #--- Home with Cartographer ---
    CG28                                    ; ⭐ CHANGE: G28 → CG28 (Open4Neptune smart home)
    CARTOGRAPHER_TOUCH_HOME                 ; ⭐ NEW: Precise Z0 measurement with Cartographer
    
    #--- Parameters ---
    {% set BED_TEMP = params.BED_TEMP|default(60)|float %}
    {% set EXTRUDER_TEMP = params.EXTRUDER_TEMP|default(200)|float %}
    {% set FILAMENT_TYPE = params.FILAMENT_TYPE|default("PLA")|upper %}
    
    #--- Pre-Heat ---
    SET_HEATER_TEMPERATURE HEATER=extruder TARGET=160  ; No-drip pre-heat
    SET_HEATER_TEMPERATURE HEATER=heater_bed TARGET={BED_TEMP}
    
    #--- Wait for Bed & Mesh ---
    {% set MIN_TEMP = BED_TEMP - (BED_TEMP * 0.15) %}
    TEMPERATURE_WAIT SENSOR=heater_bed MINIMUM={MIN_TEMP}
    BED_MESH_CALIBRATE ADAPTIVE=1
    
    #--- Nozzle Clean (KNCM) ---
    CLEAN_NOZZLE FILAMENT_TYPE={FILAMENT_TYPE}
    
    #--- Final Heat ---
    SET_HEATER_TEMPERATURE HEATER=extruder TARGET={EXTRUDER_TEMP}
    TEMPERATURE_WAIT SENSOR=extruder MINIMUM={EXTRUDER_TEMP-2} MAXIMUM={EXTRUDER_TEMP+2}   ; ⭐ TIGHTER: ±2°C
    TEMPERATURE_WAIT SENSOR=heater_bed MINIMUM={BED_TEMP-2} MAXIMUM={BED_TEMP+2}           ; ⭐ TIGHTER: ±2°C
    
    #--- Prime & Start ---
    SMART_PARK
    SET_FILAMENT_SENSOR SENSOR=filament_sensor ENABLE=1
    SET_FILAMENT_SENSOR SENSOR=filament_motion ENABLE=0
    LINE_PURGE
    G92 E0
    G1 Z2.0 F3000
    
    M117 Printer goes brrbrrr...:)
    RESPOND MSG="Print starting..."

📋 Deployment Steps:

1. Backup current config:

   cd ~/printer_data/config
   cp user_settings.cfg user_settings.cfg.backup-$(date +%Y%m%d)
   

2. Copy optimized file:

   cp optimized_user_settings.cfg ~/printer_data/config/user_settings.cfg
   

3. Restart Klipper:

   • Via Mainsail/Fluidd: Machine → Restart Firmware
   • Or SSH: sudo systemctl restart klipper

4. Test print and observe:

   • Check console for "Starting Print Sequence..."
   • Verify Cartographer Touch Home runs
   • Monitor temperature wait times

🔧 What This Improves:

• Better Z accuracy with Cartographer Touch Home
• Consistent Z-Offset reset before each print
• Tighter temperature control (±2°C vs ±4-10°C)
• Smart homing with CG28 (skips if already homed)

⚠️ Notes:

• Keep printer.cfg untouched (Open4Neptune updates will overwrite it)
• Only user_settings.cfg contains your customizations
• Backup before Open4Neptune updates!

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Created: 2026-03-12 Printer: Neptune 4 Plus Probe: Cartographer 3D Firmware: Open4Neptune