Automatic Bone Screw Inspection and Measurement

VisionGauge® Digital Optical Comparators are the perfect solution for automatic bone screw inspection and measurement.

The VisionGauge® Digital Optical Comparator is widely used by medical device manufacturers for automated  inspection and measurement of bone screws for many reasons:

Bone screw nomenclature for measurements

  • Automatically compare bone screws against their CAD data
  • With its proprietary patented CAD Auto-Align™ and CAD Auto-Pass/Fail™ tools, the system can check screws completely automatically, regardless of their orientation!
  • Eliminate operator subjectivity!
  • Collect measurements, statistics, images, and other data for complete device history information automatically
  • Thanks to the system's extended depth-of-field, the entire screw can be in focus even at the helix angle (no need to constantly refocus)!
  • Measure the screw's major and minor diameters, tooth pitch & spacing and other characteristics - even runout - completely automatically and to a very high accuracy
  • With the optional rotary stage, you can automatically measure the helix angle, very accurately!
  • The system is perfect for bone screw inspection and measurement directly on the shop floor
Bone screw teeth verification with the VisionGauge® “Tooth Checker™” tool

Patented CAD-Auto-Align™, CAD-Auto-Pass/Fail™ & Tooth Checker™ tools are perfect for locating the teeth crests and/or roots and checking the part’s profile

CAD Auto Pass/Fail and CAD Auto-Align tools on the VisionGauge Digital Optical Comparator inspecting threads and other features of interest on bone screws.

Check all the features of interest, quickly and to very high accuracy

Proprietary CAD-Auto-Align and CAD-Auto-Pass/Fail tools for bone screw measurement

Proprietary CAD-Auto-Align and CAD-Auto-Pass/Fail tools

Multiple bone screws ready for automated inspection on the VisionGauge Digital Optical Comparator

Load multiple screws onto the system to have them all checked completely automatically

Automatic inspection and measurement of threads and other dimensions of a bone screw

Automatically check screw dimensions

Bone screw head measurements

Check all of the features on the head

For bone screws inspection and measurement on the VisionGauge® Digital Optical Comparator, some manufacturers use horizontal configurations, while others use a vertical configuration. The decision to use one or the other is generally based on fixturing considerations. The hard chrome plated stage, made from hardened tooling steel, has industry standard dual dovetail grooves that make it compatible with existing mounting fixtures, and a drop-in replacement for traditional optical comparators. Rotary stages are also an option that can be added to these systems.

Download a .pdf version of this VisionGauge® Digital Optical Comparator Application Note.

Machine Vision Products Application Bulletins: