User's Manual
MH3D
©2004 TESA Switzerland All Rights Reserved.
Page 5-19
Glossary
Resolution The least increment of a measuring device. On a CMM,
the least reading on the display.
Response Time The distance traveled by the probe from the time of
actual contact with the part until the computer registers
that contact.
Retract The distance the probe backs up after contacting the part.
RFS Regardless of Feature Size. A method of tolerancing that
does not allow increased tolerance as the feature size
varies. The tolerance must be met regardless of the size
of the feature.
Right Hand Rule A rule based on the right hand that defines the major,
minor and third axis of a coordinate system.
Roll The twist of an axis about a centerline. It is most obvious
in the Z axis when using an extended horizontal probe.
The angular motion of a carriage, designed for linear
motion, about the linear motion axis.
Rotate An alignment function used to rotate the part’s coordi-
nate system about the origin the specified amount of
degrees.
Roundness The condition of a circle as it exists within a tolerance
zone formed by two concentric circles. Also known as
circularity. A measurement routine which computes the
deviation of a circle from true roundness.
Run To execute a part program.
Runout The deviation of a feature form from nominal during
rotation of the part on the datum axis.
Safe Operating The temperature reange in which a CMM may be
Temperature Range expected to operate without physical damage to the
machine or its support systems.
Scale The fixed portion of a measuring device.
Scaler A modifier to a feature that defines a specific
characteristic.
Screen The video display on a computer.
Seating Probe A hard probe that will maintain its location with respect
to a measurement point without operator contact.
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