Traditionally, 3-D dimensional inspection was performed in the quiet, stable, spotless, and controlled environment of quality labs. But during the past few decades, manufacturers have been increasingly interested in measuring devices that are both comprehensive in scope and portable. Nowadays, measurement has broken outside the labs, mainly because successful companies need to be able to produce quickly and accurately to keep their competitive advantage. They depend on technologies that allow them to measure parts on site, wherever the part may be: in the design phase, directly on the production line, or even on the supplier’s or customer’s premises.
Portable measurement technology really took off during the 1990s with the launch of the first portable measuring arms. When compared to traditional coordinate measuring machines (CMMs), they offered obvious and unequaled benefits to quality technicians and metrologists. Starting with hard-probing measurement, the arms represented a valuable alternative to the numerous constraints of CMM measurement (with mandatory stability and limited measuring volume heading the list). Attaching laser-scanning heads onto the arms quickly followed, creating even more measurement possibilities by allowing quick surface measurement.
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