Laser Tracker Accuracy Certification for Large Volume Measurement

Abstract

What should a customer be allowed to expect from a laser tracker, and how would they check it? Raimund Loser argues for a common accepted standard on four grounds: comparable specifications between trackers, comparability with other measurement equipment, a method to verify accuracy, and a guideline a customer can write an acceptance test against, so that quality assurance has a technical basis for its decisions. He then compares the two standards on offer – ASME B89.4.19-2006, which separates error influence parameters, tests at long range and uses scale bars at shorter distances and two-face measurements for geometrical errors, arriving at a maximum permissible error; and VDI/VDE 2617-10 – and what each one actually tells you.