Choosing the Right Industrial Inspection Method

Contact measurement techniques include coordinate measuring machines with tactile probes, handheld gauges, and mechanical comparators. These tools physically touch specific points on the part to determine dimensions. The probe's position in three-dimensional space tells you exactly where that point sits relative to a reference frame.

Non-contact approaches use cameras, laser scanners, or projected light patterns to capture surface information. These systems photograph or scan the part, then utilize software to analyze the images to extract dimensional data. No physical contact means delicate parts stay undamaged, and inspection happens faster since there's no need to carefully position probes.

The way that manufacturers examine intricate geometries has changed as a result of non-contact measuring. Without ever touching the component, image measuring systems use high-resolution cameras to record dimension al data. This method significantly accelerates inspection cycle times and removes the possibility of surface damage.

Optical systems excel at measuring soft materials, finished surfaces, and intricate parts like circuit boards, rubber seals, and plastic moldings. They capture hundreds of dimensions in seconds, impossible with tactile methods.

Lighting proves more important than many realize, as different illumination angles reveal different features. Ring lights highlight edges, coaxial lighting shows surface texture, and backlighting creates clear silhouettes. Luckily, advanced systems like the IM-X1000 Series automatically adjust lighting based on which features need measurement.

Surface finish can affect non-contact measurement but has minimal impact on contact methods. Shiny, reflective surfaces that can confuse optical systems pose no problem for touch probes. The probe simply touches the high points and establishes dimensions based on physical geometry rather than light reflection or imaging.

The XM Series demonstrates how contact measurement technology has evolved. With an easy-to-use wireless probe, inspectors can utilize it to fully inspect 3D and GD&T features on a part quickly and accurately. This approach combines the accuracy of contact measurement with speeds approaching non-contact methods.

Before full production starts, pe rforming a first article inspection confirms that manufacturing processes can create parts that meet design criteria. Tooling difficulties, programming mistakes, and material problems are detected in this verification step, while they are still easily resolved. To make sure everything is correct, the first component of a new configuration is measured thoroughly.

Using a variety of instruments, traditional first article procedures entail manually measuring dozens or even hundreds of dimensions. Hours are spent on the procedure, and errors are introduced as measurements are transferred between instruments. This process is streamlined by digital inspection devices, which record all necessary dimensions in well-planned configurations.

KEYENCE quality systems use thorough measurement reporting to support first article criteria. The software automatically generates reports in formats needed by AS9100 and other standards by comparing as-measured dimensions against CAD models or specification limitations.

In-process inspection capabilities extend first article verification throughout production runs. To make sure the procedure stays stable, you might inspect samples on a regular basis rather than simply the first component.

Contact KEYENCE to explore how our quality measurement systems can improve your inspection accuracy and efficiency.