What, Exactly, is Portable CMM Technology?

Metrology technology has constantly evolved as the needs of manufacturing have become more stringent. Recent developments have allowed portable CMMs to become more prominent in the marketplace since they can be integrated into the manufacturing process. This has turned what has traditionally been an inspection device into a value added option for cutting-edge manufacturers.

There are several different tools available for the measurement and inspection of parts and products. The specific application often determines the best choice as each tool has its own benefits and drawbacks. Over the years, these tools have become more advanced in order to keep up with improved quality standards.

Today’s manufacturing demands often require that processes adhere to the best possible practices to maximize value. One clear way to do this is to improve production times and to minimize waste. Implementing portable CMM technology at every aspect of the manufacturing cycle can achieve this goal – improving both time and cost savings.

There are two main types of portable CMMs: articulated arms and laser trackers. Articulated arms determine and record the location of a probe in 3D space and report the results through software. To calculate this location, the rotational angle of each joint and the length of each segment in the arm must be know. The rotational angle is determined using optical rotary encoders that count rotations incrementally, and software is used to convert those counts into angle changes.

Laser trackers operate by measuring two angles and a distance. The tracker sends a laser beam to a retroreflective target held against the object being measured. As light is reflected off the target, it bounced back and re-enters the tracker at the same position it left and is measured by a distance meter, measuring the distance between the tracker and target.

Portable CMM technology can be used for many different applications and continue to grow in popularity. Companies implementing this technology are getting the accuracy results they need in addition to flexibility to use the unit wherever and whenever it's most convenient.

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