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FaroArm
®
Quantum
August 2017
122
Chapter 6: Maintenance and Troubleshooting
Temperature Considerations
FARO was awarded the U.S. patent #5,402,582, and worldwide patents are
pending, on the concept and the methods for temperature compensation of
portable CMM devices. This brief overview is meant only as the most general of
descriptions.
To maintain certified accuracy in a multitude of environments, the monitoring of
temperature and the rate of temperature change is required. Only the Quantum
employs a software/hardware solution where a semiconductor temperature sensor
is built into each joint.
The temperature is continuously monitored and the difference over time is then
applied to the mathematical formulas or kinematics, which define the position of
the Quantum in three-dimensional space. Link length corrections are made
constantly by the inboard processor, which adjusts the kinematics and constantly
adapts the output to changing environmental temperature.
However, because different components heat or cool at different rates, the device
is expected to reach a steady state temperature within a ±3 degree (Celsius)
bandwidth for five minutes before measurements can be taken. For convenience,
the electronics system is programmed to generate an error message when the
temperature exceeds a ±3 degree bandwidth. There is also a built-in routine for
the establishment of temperature stability; whereby, the device monitors itself for
five minutes and indicates to the user that it is ready for use.
Electrostatic Discharge (ESD)
Electrostatic Discharge (ESD) refers to pulses generated by the discharge of
loaded objects and/or people. The charge usually comes from friction between
materials, at least one of which is a nonconductor.
•
Although these units are protected against damage by ESD, extra care and
proper ESD procedures still must be observed and followed.
If an error occurs because of ESD, check the Error Message displayed on the
screen and follow the steps below to resume normal operation:
1.
Turn off the Quantum.
2.
Wait for at least five seconds before powering the unit on.
This should restore communication with the host computer.
ESD Best Practices
The following is a list of equipment and best practices to avoid ESD events.
08m80e00_FaroArm_Quantum.book Page 122 Tuesday, August 22, 2017 11:03 AM