3D Scanning & Reverse Engineering
We Print From Scans — But CAD Is Almost Always Better
We accept STL, OBJ, PLY, and 3MF scan data and can reverse-engineer scans into clean parametric CAD. Before you go down the scanning path, read the trade-offs below — nine times out of ten, a quick CAD build saves time, money, and a disappointing fit-check.
Our Honest Recommendation
If you have calipers and an hour, a hand-built CAD model will almost always out-perform a scan — tighter tolerances, cleaner surfaces, smaller files, editable forever. We'll happily print your scan, but we'll also tell you when CAD is the better path. That's a cheaper part for you and fewer reprints for us.
3D scanning captures the surface of a physical object as a mesh of triangles. It's invaluable when you're working from a physical reference with no drawings — a legacy part, an organic shape, a broken component. It's also lossy, noisy, and non-parametric by nature, which is why we push customers toward CAD whenever it's an option.
Accepted Formats
STL, OBJ, PLY, 3MF
Preferred for CAD
STEP, IGES
Typical Scan Accuracy
±0.1 – 0.5 mm
CAD Accuracy
±0.01 mm (exact)
Mesh Repair
Included at quote review
Scan-to-CAD Turnaround
3 – 7 business days
Why We Recommend CAD First
Exact tolerances
CAD defines features parametrically — a 10.00 mm hole is 10.00 mm. Scans carry surface noise of ±0.1 to ±0.5 mm that shows up as wobble on cylinders, warping on flat faces, and oversize bores.
Clean manufacturability
Scanned meshes frequently ship with non-manifold edges, holes from occluded geometry, and inverted normals. Our slicer rejects or silently mis-prints those; CAD is watertight by construction.
Editable later
A STEP file can be modified — change a wall thickness, adjust a fillet, add a mounting boss — in seconds. A scanned mesh has to be rebuilt from scratch for the same change.
Better surface finish
CAD surfaces slice into straight toolpaths; scan noise becomes visible layer-line scatter in FDM and step artifacts in SLA. Post-processing can't fully hide it.
Smaller files, faster quotes
A 50 MB scan mesh with 2M triangles takes seconds to upload and longer to slice. The equivalent STEP is typically 50 – 500 KB.
IP-friendly
If you own the original design, CAD is yours forever and vendor-independent. A scan tethers you to whoever took it and whoever cleans it up.
When Scanning Actually Makes Sense
- Reproducing a legacy part with no surviving drawings
- Replicating an organic shape — a prosthetic liner, a human body surface, a weathered casting
- Fit-checking against an existing assembly where only the mating part is available
- Capturing a one-off broken component for repair or replacement
Frequently Asked Questions
Do you do 3D scanning in-house?
We partner with scanning specialists when it's the right fit, but we don't push scanning as the default. For most parts, a quick CAD build — even from hand-measured dimensions — is faster, cheaper, and produces a better print. Reach out via our contact form with what you're trying to reproduce and we'll advise.
Can you print directly from a scan file?
Yes. We accept STL, OBJ, PLY, and 3MF meshes. Our engineers run mesh repair on upload (patch holes, merge duplicate vertices, fix normals). If the scan is unusable we'll flag it and either quote the repair work or recommend rebuilding it as CAD.
When should I rebuild a scan as CAD instead of printing the mesh directly?
When accuracy matters. Functional fit, mating features, interfaces to other parts, and anything that will be made more than once should be CAD. One-off cosmetic reproductions where fit doesn't matter (a statue, a decorative handle, a presentation model) can print directly from mesh.
Do you offer scan-to-CAD / reverse engineering?
Yes. We rebuild scans into parametric STEP files — clean sketches, proper datum features, editable dimensions. Typical turnaround is 3-7 business days depending on complexity. Pricing starts at $200 for simple brackets and scales with feature count. Request a quote with your scan + a description of what features matter.
What scan accuracy do you work with?
Typical handheld/structured-light scanners achieve ±0.1 to ±0.5 mm. That's fine for aesthetic reproduction but too loose for anything that has to fit to another machined or molded part. Industrial metrology scanners reach ±0.02 mm — if your source is one of those we can usually print the mesh as-is.
Can a scan capture internal features?
Optical and structured-light scanners only see line-of-sight surfaces, so enclosed cavities, threaded holes, and undercuts don't capture. CT scanning does capture internals but costs $500+ per part and isn't typically worth it for printing. If your part has critical internal features, plan on CAD.
How do you clean up messy scan data?
We use Meshmixer and Netfabb for hole-patching, smoothing, decimation, and normal repair. For parts that need true geometric intent (flat faces truly flat, cylinders truly cylindrical) we rebuild the relevant surfaces in CAD and blend with the organic portions of the scan.
Why do you recommend CAD so strongly?
Because over and over we've seen customers send in a beautiful-looking scan, get a print back, and be disappointed it doesn't fit the thing it's supposed to fit. Scan noise compounds through the printing process — the finished part is typically ±0.3 to ±0.8 mm off ideal. A 30-minute CAD rebuild of a simple part eliminates that entirely. We'd rather you spend that half hour up front than ship you a part you can't use.
Not sure which way to go?
Send us what you have — a scan, a sketch, calipered dimensions, or just a photo and a description. We'll recommend the cheapest path to a part that fits.