Dimensional Measurement and Tolerance Control
Measure diameter, length, angle and centre distance without contact.
Measuring with calipers is sampling; measuring with a camera is full inspection. The difference is the number of bad parts that reach the field.
Back-lighting sharpens the part silhouette; sub-pixel edge finding computes diameter, length, angle, centre-to-centre distance and area. Measurement is tied to the metric system with a calibration artefact, and temperature and lens distortion are corrected. A measured value is stored for every part, so quality control becomes process capability rather than individual verdicts.
How it works
Edges via back-lighting
The part is lit from behind; surface texture and colour drop out and only geometry remains.
Sub-pixel precision
Edge transitions are modelled below pixel resolution, markedly reducing measurement noise.
Verdict and process data
The measurement is compared against nominal and tolerance values; the result yields both an OK/NOK verdict and trend data.
Is the dimension drifting even while it stays in tolerance?
The biggest gain from full inspection is not the rejected parts but seeing drift early while it is still within tolerance. The moment the mean starts moving away from nominal, mould wear or a tool change is still a plannable maintenance job; unnoticed, it becomes downtime and scrap.
| Outer diameter | 1.62 |
| Inner diameter | 1.48 |
| Height | 1.33 |
| Centre distance | 1.21 |
| Angle | 1.05 |
Low capability on the angle traces back to fixture repeatability; the value rises quickly once part positioning is improved.
| d1 | 0.00 |
| d2 | 0.01 |
| d3 | 0.01 |
| d4 | 0.02 |
| d5 | 0.03 |
| d6 | 0.04 |
| d7 | 0.05 |
| d8 | 0.06 |
A maintenance request is opened before the trend crosses the threshold; when mould maintenance is done during a planned stop, no scrap is produced.
Use cases
Spring and washer metrology
Spring length, diameter and centre distance control.
Machined parts
Hole position, angle and tolerance verification.
Electromechanical parts
Pin pitch and body dimension inspection.
Injection-moulded parts
Form, burr and cavity measurement.
Technical requirements
| Optics | Telecentric lens; perspective-induced measurement error is removed |
| Lighting | Collimated back-lighting; edge contrast held constant |
| Calibration | Periodic verification with a certified calibration artefact |
| Fixture | Part-positioning repeatability directly determines measurement precision |
| Output | Measured value, OK/NOK verdict, SPC data and capability report |
Frequently asked questions
How does Dimensional Measurement and Tolerance Control work?
Measuring with calipers is sampling; measuring with a camera is full inspection. The difference is the number of bad parts that reach the field.
How accurate is it in the field?
Measured accuracy: ±0.02 mm. Low capability on the angle traces back to fixture repeatability; the value rises quickly once part positioning is improved. Thresholds are calibrated on your own site during the pilot.
Is it compliant with KVKK, Türkiye's data-protection law?
Footage is processed on an edge server inside your facility; raw video is not sent to the cloud. Facial recognition is not used; analytics outputs are anonymous and event clips are deleted automatically when the defined retention period ends.