Preparing an STL File for Printing

STL does not reliably carry a unit definition in every workflow. Open the file in the viewer and confirm that the millimetre dimensions match the intended size before relying on an estimate.

Look for open surfaces, non-manifold edges, intersecting faces, and duplicated internal bodies. A watertight, sliceable model reduces analysis failures.

Check minimum thickness, small details, and clearance between parts. Explain the intended use when fit, strength, or load direction matters.

Start with the part’s purpose, final dimensions, and the environment where it will be used. Then compare the material, orientation, and finish against those requirements rather than choosing a setting in isolation.

If a fit, load, or heat requirement matters, request a small test or a file review. A test makes it easier to check tolerances and surface quality before committing to a larger production run.

• Confirm scale, units, and the intended use.
• Record any critical fit, load, heat, or finish requirement.
• Keep the original model and compare the final estimate with the requested settings.

Ask for help when the part contains moving interfaces, thin walls, unusual materials, or safety-sensitive requirements. The final recommendation should reflect the actual printer, material, and delivery conditions available for the order.