Initial infrastructure documentation - comprehensive homelab reference
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Funky (OpenClaw)
179
Printing/Nameplates/add_height_modifier_orca.py
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179
Printing/Nameplates/add_height_modifier_orca.py
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#!/usr/bin/env python3
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"""
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Add M600 filament change to Orca Slicer 3MF file.
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Based on actual Orca Slicer format analysis.
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Adds global height_range_modifier metadata that applies to all objects.
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Usage:
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python add_height_modifier_orca.py input.3mf [output.3mf]
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"""
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import sys
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import zipfile
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import xml.etree.ElementTree as ET
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from pathlib import Path
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import tempfile
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import os
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def add_height_modifier(input_file, output_file=None, height_mm=1.5):
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"""
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Add height range modifier metadata to 3MF file.
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Args:
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input_file: Path to input 3MF file
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output_file: Path to output 3MF file (optional)
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height_mm: Height in mm where filament change occurs
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"""
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input_path = Path(input_file)
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if not input_path.exists():
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print(f"Error: Input file '{input_file}' not found!")
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return False
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if output_file is None:
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output_path = input_path.parent / f"{input_path.stem}_modified.3mf"
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else:
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output_path = Path(output_file)
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print(f"Processing: {input_path}")
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print(f"Output: {output_path}")
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print(f"Filament change at: {height_mm}mm")
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print("-" * 60)
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with tempfile.TemporaryDirectory() as temp_dir:
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temp_path = Path(temp_dir)
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# Extract 3MF
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print("Extracting 3MF...")
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with zipfile.ZipFile(input_path, 'r') as zip_ref:
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zip_ref.extractall(temp_path)
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# Find model file
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model_file = temp_path / "3D" / "3dmodel.model"
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if not model_file.exists():
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print("Error: Could not find 3dmodel.model!")
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return False
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print("Modifying model file...")
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# Parse XML
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tree = ET.parse(model_file)
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root = tree.getroot()
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# Register namespaces
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namespaces = {
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'': 'http://schemas.microsoft.com/3dmanufacturing/core/2015/02',
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'BambuStudio': 'http://schemas.bambulab.com/package/2021',
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'p': 'http://schemas.microsoft.com/3dmanufacturing/production/2015/06'
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}
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for prefix, uri in namespaces.items():
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if prefix:
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ET.register_namespace(prefix, uri)
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else:
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ET.register_namespace('', uri)
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# Find or create metadata section (should be at root level, before <resources>)
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# Check if height_range_modifier already exists
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existing_modifier = None
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for metadata in root.findall('.//metadata[@name="height_range_modifier"]', namespaces):
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existing_modifier = metadata
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break
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if existing_modifier is not None:
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print(" Found existing height_range_modifier, replacing...")
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root.remove(existing_modifier)
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# Create the height range modifier metadata
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# Format: JSON string - we'll manually insert it to avoid auto-escaping
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metadata_json = (
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'{"ranges":['
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f'{{"min":0,"max":{height_mm},"color":"RoyalBlue"}},'
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f'{{"min":{height_mm},"max":999,"color":"white","gcode":"M600"}}'
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']}'
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)
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# Create metadata element - we'll manually set the text with proper escaping
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metadata_elem = ET.Element('metadata')
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metadata_elem.set('name', 'height_range_modifier')
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# Don't use .text = ... as it will auto-escape
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# We'll replace this after writing
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# Insert after the last existing metadata element (before <resources>)
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resources = root.find('.//resources', namespaces)
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if resources is not None:
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resources_index = list(root).index(resources)
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root.insert(resources_index, metadata_elem)
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else:
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# No resources found, just append
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root.append(metadata_elem)
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print(f" Added height_range_modifier metadata")
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print(f" Blue layer: 0mm to {height_mm}mm")
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print(f" White layer: {height_mm}mm to top (with M600)")
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# Save modified XML
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tree.write(model_file, encoding='utf-8', xml_declaration=True)
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# Post-process the file to fix the escaping
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# Python's ET auto-escapes, but we need &quot; not &amp;quot;
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with open(model_file, 'r', encoding='utf-8') as f:
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content = f.read()
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# Replace the empty metadata element with our properly escaped version
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escaped_json = metadata_json.replace('"', '&quot;')
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content = content.replace(
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'<metadata name="height_range_modifier" />',
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f'<metadata name="height_range_modifier">{escaped_json}</metadata>'
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)
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content = content.replace(
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'<metadata name="height_range_modifier"></metadata>',
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f'<metadata name="height_range_modifier">{escaped_json}</metadata>'
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)
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with open(model_file, 'w', encoding='utf-8') as f:
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f.write(content)
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# Re-create 3MF file
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print("Creating modified 3MF...")
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with zipfile.ZipFile(output_path, 'w', zipfile.ZIP_DEFLATED) as zip_out:
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for root_dir, dirs, files in os.walk(temp_path):
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for file in files:
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file_path = Path(root_dir) / file
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arcname = file_path.relative_to(temp_path)
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zip_out.write(file_path, arcname)
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print()
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print("Success! Modified 3MF saved.")
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print()
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print("Next steps:")
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print("1. Open the modified file in Orca Slicer")
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print("2. Check if height range modifier appears")
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print("3. Slice and verify M600 in G-code")
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print()
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print("Note: This adds a GLOBAL height modifier that applies to")
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print(" all objects in the build plate.")
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return True
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def main():
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if len(sys.argv) < 2:
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print("Usage: python add_height_modifier_orca.py input.3mf [output.3mf]")
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print()
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print("Adds M600 filament change at 1.5mm (global, applies to all objects)")
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sys.exit(1)
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input_file = sys.argv[1]
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output_file = sys.argv[2] if len(sys.argv) > 2 else None
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success = add_height_modifier(input_file, output_file)
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if not success:
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sys.exit(1)
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if __name__ == "__main__":
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main()
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