Zeiss CenterMax, Operating Instructions Manual

Page: 122 / 166

7-22
Measuring operation
61211-1020202 CenterMax Operating Instructions
Temperature compensation
What is temperature compensation?
The measuring software calculates the workpiece geometry for the
material properties at 20°C. 20°C is the reference temperature. Since
the actual temperature deviates from 20°C, the geometric data have
to be corrected by a correction value.
Expansion coefficient
The correction value is calculated by the measuring software. How-
ever, the measuring software needs to know the temperature of the
CMM and the workpiece. Furthermore, the expansion coefficient
must be entered in the measuring software
➤
operating instructions
for the measuring software.
Procedure :
• Enter the expansion coefficient for the workpiece material in the
measuring software.
• Connect the temperature sensors
➤
page 7-22 .
Calculating the correc-
tion value
The measured values are automatically transferred to the measuring
software. The measuring software calculates the correction value.
All of the geometric data measured on the workpiece are corrected by
the correction value with respect to the reference temperature of
20°C. Exact workpiece measurement is thus guaranteed.
Connecting the temperature sensors
Two temperature sensors are included in the standard equipment of
the CMM. These sensors are required for temperature compensation.
Sensor components
The temperature sensors consist of a copper block, a long cable and a
connector.
1 Copper block
2 Connector
1
2