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FARO® Knowledge Base

Accuracy of the FaroArm with the Optional Tripod and Magnetic Mounts

Introduction

The accuracy testing and certification of the Faro Arm by FARO Technologies, Inc., is done in a controlled environment, which ensures ideal mounting conditions. Such is not always the case in the working environments in which the Faro Arm is often used. In actual usage, the quality of the setup depends on the stability of the floor and the work surfaces, and may also be subjected to external loads or vibration. Even the mounting hardware may introduce some inaccuracy, by deflecting under the torque of the internal-counter-balance spring.

While the external factors fall under the control of the users, deflection internal to the mounts supplied by FARO Technologies, Inc. have been evaluated, in order to predict the amount on inaccuracy added by such equipment. The purpose of this document is to provide accuracy data for the Faro Arm, mounted to the optional tripods and magnetic mounts.

Summary

Several accuracy tests were done with the Faro Arm mounted to the optional Brunson tripods and the magnetic mounts. In all the cases tested, the Faro Arm demonstrated single-point repeatability and volumetric performance within the certified values for the models tested. The measured error was also much smaller than the values predicted from tripod deflection data. We concluded that, for these specific conditions, while the optional mounts may add some inaccuracy to the measurements, the loss of accuracy was not significant enough to cause more error than would be expected with a more ideal rigid mount. However, it should be noted that larger errors may be produced if for example the magnetic mount is fixed to a more flexible base than that reported herein. Care should also be taken to avoid the use of unnecessary force in pulling the FaroArm from its rest position. This may result in very subtle movements of the tripod, which will affect accuracy.

Please see the attached document for more details.

Click here to download: Mounting and Accuracy

 

Keywords:

mounting, setup, accuracy, magnetic mount, magmount, tripod, folding tripod