loh.ai checks the 3D scans you already take for surface defects, grades each one and writes the inspection report in seconds.
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Export the STL or mesh from your 3D scanner as you do now. The example here is a machined plate, 60 × 40 mm, and every number in this walkthrough comes from its scan.
Machined plate, 60 × 40 mm
15,000 points · 0.40 mm spacing · raw scan
loh.ai fits a surface to the part and measures how far each scan point sits from it. Points past the threshold are flagged at the same sensitivity on every part and every shift, so the result doesn't depend on who is inspecting or how long they've been at it.
Machined plate, 60 × 40 mm
Points that stray are grouped into defects. Each one is classed by type and graded on its area and how far it deviates, so your team can start with the critical ones.
Machined plate, 60 × 40 mm
Each scan produces a report giving every defect's location, type, size, depth and grade, with a plain-English summary of the result. You don't need a metrology specialist to read it. If a finding needs explaining, an assistant answers questions using that scan's measurements.
| Report no. | SAMPLE-001 |
| Issued | 23 Oct 2026 |
| Revision | A |
Automated 3D scan analysis
| Part | Machined Plate |
| Source file | test_plate.stl |
| Envelope | 60.0 × 40.0 × 0.9 mm |
| Points analysed | 15,000 |
| Median point spacing | 0.403 mm |
| Surface variation (1σ) | 9.3 µm |
| Detection sensitivity | 8.0 |
| Findings | Critical | Moderate | Minor |
|---|---|---|---|
| 6 | 4 | 1 | 1 |
Six surface defects found across 15,000 measured points. Four are critical, one moderate and one minor.
The critical findings are two pits and two bumps, each covering at least 10 mm². The largest is pit D1 at 26.8 mm², 58 µm deep.
Pit D6 covers 1.6 mm² across 10 points at 2.9σ, close to the scan's noise floor. Re-scan that area before acting on it.
| ID | Type | Grade | Area (mm²) | Max. dev. (µm) | σ | x (mm) | y (mm) |
|---|---|---|---|---|---|---|---|
| D1 | Pit | Critical | 26.76 | −58 | 6.2 | 24.8 | 25.1 |
| D2 | Bump | Critical | 22.38 | +94 | 10.1 | 15.1 | 9.9 |
| D3 | Bump | Critical | 15.24 | +106 | 11.4 | 40.1 | 30.1 |
| D4 | Pit | Critical | 10.22 | −125 | 13.4 | 9.9 | 32.1 |
| D5 | Bump | Moderate | 8.11 | +109 | 11.7 | 49.9 | 11.9 |
| D6 | Pit | Minor | 1.62 | −27 | 2.9 | 28.0 | 35.0 |
Max. dev. is measured from the fitted surface: negative for material missing (pit), positive for material added (bump). Locations are finding centres from the lower-left corner.
Each scan point is compared with a surface fitted to the part. Points that deviate beyond the detection threshold are clustered into findings, classed as a pit or a bump by the direction of deviation, and graded on the area they cover and their maximum deviation.
| Prepared byloh.ai automated inspection | Reviewed by | Date |
Written automatically from the measurements in this scan.
Machined plate, 60 × 40 mm
| Report no. | SAMPLE-001 |
| Issued | 23 Oct 2026 |
| Revision | A |
Automated 3D scan analysis
| Part | Machined Plate |
| Source file | test_plate.stl |
| Envelope | 60.0 × 40.0 × 0.9 mm |
| Points analysed | 15,000 |
| Median point spacing | 0.403 mm |
| Surface variation (1σ) | 9.3 µm |
| Detection sensitivity | 8.0 |
| Findings | Critical | Moderate | Minor |
|---|---|---|---|
| 6 | 4 | 1 | 1 |
Six surface defects found across 15,000 measured points. Four are critical, one moderate and one minor.
The critical findings are two pits and two bumps, each covering at least 10 mm². The largest is pit D1 at 26.8 mm², 58 µm deep.
Pit D6 covers 1.6 mm² across 10 points at 2.9σ, close to the scan's noise floor. Re-scan that area before acting on it.
| ID | Type | Grade | Area (mm²) | Max. dev. (µm) | σ | x (mm) | y (mm) |
|---|---|---|---|---|---|---|---|
| D1 | Pit | Critical | 26.76 | −58 | 6.2 | 24.8 | 25.1 |
| D2 | Bump | Critical | 22.38 | +94 | 10.1 | 15.1 | 9.9 |
| D3 | Bump | Critical | 15.24 | +106 | 11.4 | 40.1 | 30.1 |
| D4 | Pit | Critical | 10.22 | −125 | 13.4 | 9.9 | 32.1 |
| D5 | Bump | Moderate | 8.11 | +109 | 11.7 | 49.9 | 11.9 |
| D6 | Pit | Minor | 1.62 | −27 | 2.9 | 28.0 | 35.0 |
Max. dev. is measured from the fitted surface: negative for material missing (pit), positive for material added (bump). Locations are finding centres from the lower-left corner.
Each scan point is compared with a surface fitted to the part. Points that deviate beyond the detection threshold are clustered into findings, classed as a pit or a bump by the direction of deviation, and graded on the area they cover and their maximum deviation.
| Prepared byloh.ai automated inspection | Reviewed by | Date |
15,000 points · 0.40 mm spacing · raw scan
Export the mesh the way you do today. The results come back with the report attached.
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