FaroArm® Quantum
August 2017
113
Chapter 5: Accuracy
Chapter 5: Accuracy
This chapter describes the definitions and specifications of accuracy, or
performance specification, for the Quantum.
The Quantum performance testing standard is the ISO 10360-12 and ISO 10360-
8. Single-point repeatability (SPAT) is measured using a hard probe in a reference
hole. Volumetric (E
Uni) performance is measured using a hard probe and a
traceable length artifact. Measurements are well distributed in all regions of the
working volume.
For more information, see “Product Specifications” on
page 145.
Compensation and Calibration ......................................................................113
Compensation versus Calibration .....................................................................................................113
Quantum Compensation ...................................................................................................................113
ISO 10360 Standard ..........................................................................................................................114
Quantum Calibration .........................................................................................................................115
Loss of a Degree of Freedom ........................................................................117
Compensation and Calibration
The Quantum is designed to endure the typical stress and impact loads of a
“factory floor” measuring tool, as well as survive multiple transportation cycles
while maintaining its accuracy throughout its usable life. In order to fully
appreciate what is meant by “Lifetime Calibration,” you must first understand
several basic concepts of measurement equipment.
Compensation versus Calibration
In most cases, the terms “compensation and calibration” are used together, and
are often mistakenly used interchangeably. This generally occurs because
traditional Coordinate Measuring Machines are often compensated every time
they are calibrated. In reference to the Quantum, there are two types of
compensation: the Quantum compensation and the probe compensation.
Quantum Compensation
Compensation is the procedure by which a measurement device is optimized to
perform accurate measurements. This may be done through mechanical
adjustments, as well as software corrections.
Specialists at FARO’s production facility perform the factory compensation. This
compensation utilizes patented hardware and software (not available to the user)
to determine the true dimensions and kinematics of the Quantum. The results of
the factory compensation are imprinted to memory located in the Quantum
08m80e00_FaroArm_Quantum.book Page 113 Tuesday, August 22, 2017 11:03 AM
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