Micro Molded Part Metrology Standards for Receiving Acceptance Inspections
Establishing rigorous non-contact metrology standards and ISO 14253-1 guardbanding protocols prevents defective micro-molded parts from entering production.
Video Measuring System
Meaning
Metrology instruments that use digital cameras and image processing software to measure part dimensions offer non-contact inspection. This apparatus is called a video measuring system, which governs the analysis of two-dimensional and three-dimensional geometries on small components. The device does not apply to manual hand tools or mechanical touch probes.
System Technology
High-resolution cameras record the edges and features of a part placed on a glass stage. A video measuring system uses specialized software to analyze the contrast between the part and the background to locate measurement points. This optical detection allows for rapid measurement of many features in a single routine.
The process is automated and does not depend on the operator’s skill.
Application Range
Small, complex parts with delicate features are the primary subject of these optical inspections. By utilizing a video measuring system, manufacturers of medical devices or electronic connectors can check tolerances of several micrometers without touching the part. This contact-free approach prevents any damage to the component being inspected.
It is particularly useful for measuring soft plastic and rubber parts that would be deformed by a standard probe.
Measurement Accuracy
Consistent lighting and stage calibration are critical to maintaining the precision of the inspection process. The performance of a video measuring system depends on using a stable granite base to minimize vibrations from the factory floor. Regular calibration against a master grid ensures that the optical scaling remains accurate.
This verification provides the traceability required by industrial quality standards.