Initial infrastructure documentation - comprehensive homelab reference
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Funky (OpenClaw)
174
Printing/Nameplates/add_filament_change_to_3mf.py
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174
Printing/Nameplates/add_filament_change_to_3mf.py
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#!/usr/bin/env python3
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"""
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Add M600 filament change command to all objects in an Orca Slicer 3MF file.
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This script modifies a 3MF file (which is a ZIP archive containing XML) to add
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a height range modifier at 1.5mm (end of blue base layer) with M600 command
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for all zipper pull objects.
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Usage:
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python add_filament_change_to_3mf.py input.3mf [output.3mf]
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If output.3mf is not specified, creates input_modified.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 shutil
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import tempfile
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import os
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def add_height_range_to_3mf(input_file, output_file=None, height_mm=1.5):
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"""
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Add height range modifier with M600 at specified height to all objects in 3MF.
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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 (default: 1.5)
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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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# Determine output filename
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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 will be: {output_path}")
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print(f"Filament change height: {height_mm}mm")
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print("-" * 50)
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# Create a temporary directory to work in
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with tempfile.TemporaryDirectory() as temp_dir:
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temp_path = Path(temp_dir)
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# Extract the 3MF (it's a ZIP file)
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print("Extracting 3MF file...")
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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 and modify the 3D model file (usually 3D/3dmodel.model)
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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 in 3MF file!")
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return False
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print(f"Modifying {model_file}...")
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# Parse the XML
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tree = ET.parse(model_file)
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root = tree.getroot()
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# Define namespaces (3MF uses namespaces)
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namespaces = {
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'': 'http://schemas.microsoft.com/3dmanufacturing/core/2015/02',
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'p': 'http://schemas.microsoft.com/3dmanufacturing/production/2015/06',
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's': 'http://schemas.orca-3d.com/3mf/2023/06'
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}
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# Register namespaces for output
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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 all objects (build items)
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# In Orca Slicer 3MF, objects are in <build><item> tags
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build_elem = root.find('.//build', namespaces)
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if build_elem is None:
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print("Warning: No <build> element found. Looking for items directly...")
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items = root.findall('.//item', namespaces)
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else:
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items = build_elem.findall('.//item', namespaces)
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if not items:
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print("Error: No items found in 3MF file!")
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return False
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print(f"Found {len(items)} object(s) in the file")
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# Count modified items
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modified_count = 0
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# Add height range modifier to each item
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for idx, item in enumerate(items, 1):
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object_id = item.get('objectid', f'unknown_{idx}')
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print(f" Processing object {idx}/{len(items)} (ID: {object_id})...")
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# Check if this item already has metadata for height range
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# In Orca Slicer, this is typically stored as metadata
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# We need to add the height range modifier metadata
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# Note: The exact XML structure for height range modifiers in Orca Slicer
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# may vary. This is a generic approach that adds metadata.
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# You may need to adjust based on actual Orca Slicer 3MF structure.
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# Create or find metadata container
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metadata_group = item.find('metadatagroup', namespaces)
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if metadata_group is None:
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metadata_group = ET.SubElement(item, 'metadatagroup')
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# Add height range modifier metadata
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# Format: height range from 0 to height_mm = blue (original)
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# height range from height_mm to top = white (with M600)
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height_modifier = ET.SubElement(metadata_group, 'metadata')
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height_modifier.set('name', 'height_range_modifier')
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height_modifier.text = f'{{"ranges":[{{"min":0,"max":{height_mm},"color":"RoyalBlue"}},{{"min":{height_mm},"max":999,"color":"white","gcode":"M600"}}]}}'
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modified_count += 1
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print(f"\nModified {modified_count} object(s)")
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# Save the modified XML back to the file
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print("Saving modified model file...")
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tree.write(model_file, encoding='utf-8', xml_declaration=True)
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# Re-create the 3MF (ZIP) file with all contents
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print("Creating new 3MF file...")
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with zipfile.ZipFile(output_path, 'w', zipfile.ZIP_DEFLATED) as zip_out:
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# Walk through the temp directory and add all files
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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(f"\nSuccess! Modified 3MF saved to: {output_path}")
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print(f"\nNext steps:")
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print(f"1. Open {output_path.name} in Orca Slicer")
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print(f"2. Verify the height range modifiers are present")
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print(f"3. Slice and check for M600 commands in the G-code")
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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_filament_change_to_3mf.py input.3mf [output.3mf]")
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print("\nAdds M600 filament change at 1.5mm to all objects in a 3MF file.")
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print("If output.3mf is not specified, creates input_modified.3mf")
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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_range_to_3mf(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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