FaroArm
®
Manual
January 2009
46
Chapter 1: Introduction to the FaroArm
®
FaroArm Calibration
Calibration 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
calibration. This calibration utilizes patented hardware and software
(not available to the user) to determine the true dimensions and
kinematics of the FaroArm. The results of the factory calibration are
imprinted to memory located in the arm electronics. The FaroArm is
permanently calibrated, such that it does not require mechanical
adjustments during normal operation.
The FaroArm will only lose its calibration (stop functioning within
FARO's published standards) if one or more of the following occurs:
• Bending of the transfer cases (long, tube sections).
• Damage to the encoder-bearing interface joints (where tubes, bearings
and encoders are mated).
• Failure of the encoder-electronics system (changes motion into
electrical data).
• Physical (plastic) deformation can occur in the arm after excessive
impact with another object or an end-stop. The impact may cause the
transfer cases to bend, the joint housings to deform, or the encoder-
bearing interface pin system to loosen.
Any of these problems require FARO's Customer Service Department to
disassemble the arm, repair the necessary item(s), and perform a factory
calibration. A factory calibration is necessary since the physical nature
of the arm has been changed.
Since the FaroArm will always require repair if it loses calibration, and
will only lose calibration if it is damaged, there is never a need for a
field or user-site calibration.
FaroArm Certification
The measuring software has commands that allow you to perform tests
that certify the accuracy and repeatability of your FaroArm. The
certification commands allow you to test the FaroArm using a single
hole, a ball bar, or a step gauge.
The values measured in all of these certifications include 100% of the
measured points. We will always refer to this as the “Max. minus Min.
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