Convert ACIS bodies into a surface mesh
An ACIS-to-STL workflow reads SAT or SAB with the commercial ACIS interface, prepares the translated OCCT shapes and writes their tessellation using the STL writer. The output is a polygonal derivative of the source BRep geometry.
The pipeline can serve tools that require triangle surfaces for visualization, printing preparation or geometric processing. Determine which bodies belong in the output and whether the receiver expects separate files or one combined surface set.
Separate geometry repair from tessellation
Inspect the translated shapes before meshing. Configure the reader’s healing operations and review approximation where it is required by the input geometry. Those decisions affect the geometric reference from which triangles are generated.
Then choose chordal deflection, angular deviation and element size for the mesh. Express Mesh provides those controls. Evaluate shared boundaries and surface orientation if the recipient requires a closed shell.
Preserve the appropriate source record
STL stores triangle geometry and does not retain the ACIS names and colors handled through XDE. Communicate the expected unit scale to the receiver and compare the reopened mesh with the translated CAD shape.
Keep SAT/SAB or use ACIS to STEP when downstream users need an engineering representation with precise surfaces. Meshing can approximate supported surfaces at the chosen tolerance, but it cannot supply missing features or repair every defective source body automatically.