AI-Designed Parts
A part designed with an AI assistant can be made like any other once it exists as a real CAD file. Ask the assistant for a script that builds the model, export an STL or STEP file from it, check the units and that the mesh is closed, then upload it.
Updated 10 Nov 2026 · 4 min read · By Wyntek
What an AI-designed part is
An AI-designed part is one whose shape was written by an AI assistant from a description, not drawn by hand in a CAD program. An assistant cannot hand over a physical shape. What it produces reliably is text, and some CAD tools build models from text.
OpenSCAD is the best known. Its own site describes it as a kind of 3D compiler: it reads a script that describes the object and renders the model from that script, and it can export the result as an STL. CadQuery does the same job as a Python library and exports both STEP and STL. An assistant that writes one of these scripts has written a part you can open, measure, change, and export yourself.
Ask for a script, not a picture
- Ask for a complete OpenSCAD or CadQuery script, not a description or an image of the part.
- Give real dimensions in millimetres, and say which faces touch other parts.
- Say how the part will be made (FDM, SLA, or CNC), so the walls and overhangs suit the process.
- Run the script yourself and look at the model before you export anything.
- Export an STL for a 3D print. Export a STEP file when the part will be machined or edited in CAD later.
Check the file before you order
An STL file describes only the surface of a part, as triangles. It holds no scale information, so its numbers have no units, and nothing in the file says whether the script meant millimetres or inches. A part modelled in inches and read as millimetres comes out 25.4 times too small.
| Check | Why it matters | How to check |
|---|---|---|
| Units | An STL stores no units, and the file is read as millimetres | Measure one dimension you know after you export |
| Closed mesh | A part can only be priced and built from a closed solid, with no holes in its surface | Open the STL in a slicer or mesh viewer and look for gaps |
| Wall thickness | Every process has a minimum below which a wall will not form | Compare your thinnest wall with the wall thickness article |
| Overhangs | Steep overhangs need supports, which leave marks | See the overhangs and supports article |
| Fits | A script gives nominal sizes. Holes and mating parts need clearance | See the tolerances and fits article |
What happens when you upload it
Wyntek's price tool measures an STL or OBJ in your browser and shows the price in US dollars without an account. It reads the part's volume, its bounding box, and whether the mesh is closed. A part whose largest side is under 5 mm is flagged as a likely unit mistake, and a mesh that is not a closed solid is priced by review. STEP files and CNC parts are also priced by review before production starts.
The assistant can do the estimating as well. Wyntek's agent API returns a dollar estimate for a file or a volume, with a link that opens the order form with the process and material already set. A person still signs in, reviews the price, and submits the order.
At Wyntek
Wyntek makes parts by FDM printing, SLA resin printing, and CNC machining in aluminium and steel. Export an STL or OBJ from the script, drop it into the price tool, and you see the price in US dollars before you create an account. Other formats are priced by review before production starts. Every part is scanned and inspected before it ships.
Price a part