Tools: meshes, drawings & assemblies

Four FreeCAD-backed tools for downstream production work — FEA prep, 3D printing, drawing packages, and assemblies. All take the standard operation envelope.

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generate_mesh

Generate and analyze meshes from CAD geometry, with quality control. Essential for FEA and 3D-printing preparation.

Parameter	Type / default	Description
deflection	float, 0.1	linear tessellation tolerance
angular_deflection	float, 0.1	angular tessellation tolerance
max_element_length	float, 1.0	target element size
export	bool, false	write the mesh to disk
export_format	string, "stl"	export format
output_name	string, "generated_mesh"	filename stem

Returns, per solid in the input file: vertex and face counts, surface area, volume (when the mesh is closed), a manifold check, and a quality_issues list (non-manifold meshes, degenerate faces below 1e-6 area). Errors: no solid objects in the file.

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create_technical_drawing

Generate technical drawings with multiple orthographic views from 3D models, using the TechDraw workbench — views, dimensions, annotations, and title-block text on a standard template.

Parameter	Description
template	page template name, default A3_Landscape
views	list of `{“view_type”: “front”
add_dimensions	bool — attempt automatic length dimensions per view
title_block	dict of title, drawn_by, date, scale rendered as annotations
output_formats	list, default ["pdf"] — pdf, svg, dxf
output_name	filename stem, default technical_drawing

Returns the created views (name, source object, type, scale, position), dimensions added, and per-format output files with sizes. Per-format export failures are reported inline rather than failing the whole call.

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create_assembly

Create assemblies from multiple part files with positioning and constraints.

Parameter	Description
part_files	list of file paths to import (required)
transformations	per part: {"part_name", "translation": [x,y,z], "rotation": [rx,ry,rz]} (degrees)
constraints	list of {"type", "part1", "part2"}
export, output_format, output_name	export; FCStd (default) or step

Returns import details per part, applied transformations, constraint definitions, and assembly properties (part count, total volume, overall bounds).

Caution

Assembly constraints are recorded but not solved — each comes back with "status": "defined_but_not_implemented". Full constraint solving requires the Assembly4 workbench, an optional third-party addon the server probes for but does not require. Positioning via transformations works regardless.

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add_material_properties

Assign material properties (density, Young’s modulus, Poisson’s ratio, yield strength, thermal properties) to CAD objects and calculate mass — simulation and FEA preparation.

Parameter	Description
default_material	applied to unmatched objects, default "steel"
materials	per-object overrides: {"object_index" or "object_name", "material", "custom_properties": {...}}
export, output_format, output_name	export; FCStd (default, preserves material objects) or step (geometry only)

Built-in materials: steel, aluminum, brass, plastic_abs. Custom properties override any built-in value, or define a fully custom material:

{
  "object_name": "CustomPart",
  "material": "custom",
  "custom_properties": {
    "density": "1500 kg/m^3",
    "youngs_modulus": "5000 MPa"
  }
}

Returns per-object assignment details (material, properties, volume, computed mass in kg), a per-material summary with counts and total mass, the total assembly mass, and the available-materials list. Mass is computed from solid volume × density.