Add optimized PRINT_START_NOCCI with Cartographer improvements

- SET_GCODE_OFFSET Z=0 for consistent Z-Offset reset - CG28 instead of G28 (Open4Neptune smart home) - CARTOGRAPHER_TOUCH_HOME for precise Z0 measurement - Tighter temperature tolerance (±2°C vs ±4-10°C) - Full documentation in CHANGES.md
2026-03-12 10:20:03 +00:00 · 2026-03-12 10:20:03 +00:00 · 913ebfd85f
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+# 📝 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:
+
+```klipper
+[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:**
+   ```bash
+   cd ~/printer_data/config
+   cp user_settings.cfg user_settings.cfg.backup-$(date +%Y%m%d)
+   ```
+
+2. **Copy optimized file:**
+   ```bash
+   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!
+
+---
+Created: 2026-03-12
+Printer: Neptune 4 Plus
+Probe: Cartographer 3D
+Firmware: Open4Neptune