AI CAD for 3D printing
QuantCAD designs 3D-printable parts from a text description, using the dimensions you give it: wall thickness, hole sizes, clearances. Each part is a B-rep solid, so a hole modeled at 5 mm is exactly 5 mm. Export STL in Draft, Normal or High quality for your slicer, or STEP to refine the part in CAD.
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What should a prompt for a printed part include?
Start with a concrete description and the key dimensions. Then iterate with small requests such as “increase wall thickness”, “add a fillet” or “move the cutout”.
Phone case
Design a protective phone case for a 6.1-inch phone. Keep wall thickness 1.8mm, add 0.35mm clearance, include a camera cutout and button cutouts. Add a 0.8mm lip around the screen and camera, rounded corners, and a small lanyard hole.Wall-mount bracket
Create an L-shaped wall-mount bracket. Plate thickness 4mm, inside corner fillet radius 3mm. Add two 6.5mm clearance holes on the wall plate spaced 40mm apart, and two 5.2mm clearance holes on the horizontal plate spaced 30mm apart. Add chamfers on external edges.Which file should you export for 3D printing?
Export STL for slicers such as Cura, PrusaSlicer, Bambu Studio and OrcaSlicer. QuantCAD generates the STL from the solid: Draft is fine for a test print, Normal suits most parts, and High gives smoother curves at the cost of a larger file. Export STEP when you want to edit the part in a CAD tool or send it to someone who will.
Tips for better results
- State key dimensions first (thickness, overall size, hole diameters).
- Call out clearances explicitly for snap fits, press fits and covers.
- Specify which edges should be filleted or chamfered.
- Iterate with small, targeted changes rather than rewriting the whole prompt.
Frequently asked questions
Can I export STL for 3D printing?
Yes. QuantCAD exports binary STL generated from the B-rep solid in three presets: Draft for quick test prints, Normal as the default, and High for smooth curved surfaces. STEP is available when you want to refine the part in a CAD tool.
How do I design a 3D printable bracket with AI?
Describe the bracket with every dimension that matters: plate thickness, hole diameters and spacing, fillet radius and overall size. QuantCAD builds it as a solid, so the hole sizes and spacing are exact values you can check. Review it in the 3D viewer, ask for targeted changes, then export STL for your slicer.
How do I get better fits and functional results?
Include critical dimensions, wall thickness, clearances and any interface constraints, such as bolt patterns or snap-fit intent. Iterating with targeted changes is usually faster than rewriting the whole request.
Do I need CAD experience?
No. You can start by describing what you want in plain language. Being specific about dimensions and constraints improves the result.