Hexagon Metrology has a “new-to-the-market” non-contact scanning probe for high-accuracy measurement and inspection that it calls “an attractive alternative to conventional tactile analog measurement and scanning probes.” The HP-O device exerts no physical impact on a part, meaning force-free measurement of blisks, blades, gear profiles and flank lines, and other critical components that rely on dimensional accuracy but still have potential for deformation.

When used for ultra-high accuracy inspections, the HP-O’s scanning technology can be used to inspect metallic or sensitive part surfaces with mirror-like or polished finishes, eliminating the need to spray a part’s surface.

“Historically, tactile analog probing has been the most accurate means of measuring parts, but there are limitations when inspecting sensitive or deformable surfaces,” observed Ingo Lindner, the product line manager. “The accuracy and reliability of the new optical measurement solution are comparable to tactile scanning probes without their drawbacks.”

The HP-O probe’s 3-mm diameter and measurement range of up to 20 mm provide access to points that are not accessible by tactile probes. Optical measurements can be captured in single point or scanning mode.

The developer claimed the HP-O probe delivers repeatability of under 0.3 μm when used with its own Leitz PMM-C coordinate measuring machine (CMM).

With an acceptance angle of ±30 degrees, the probe can measure difficult-to-access features at a scanning speed of 1,000 points per second for rapid throughput.

The HP-O’s scanning technology is not affected by ambient light, and is based on frequency-modulated, interferometric optical distance measurement. Its dense data acquisition does not suffer from degradation at higher speeds, and its high throughput capability renders it ideal for scanning large parts and parts that are rotationally symmetric.

It is multi-sensor compatible in a single part program using a standard tool changer.

“The HP-O probe is compatible with existing part programs and has flexible configurations to facilitate inspections of even the most complex parts,” according to Lindner

Hexagon Metrology offers products and services for all industrial metrology applications, in automotive, aerospace, energy, and medical manufacturing, among other sectors.