©2004 TESA Switzerland All Rights Reserved.
Page 5-10
User's Manual
MH3D
Hit A CMM input point of the current X, Y, Z coordinates
originated by the user through a switch or touch trigger
probe signal. A measurement.
Home Machine zero. The 0, 0, 0 point (intersection) of the
three machine axes X, Y and Z.
Host Computer The computer that controls the CMM.
Hysteresis A component of bi-directional repeatability caused by
mechanisms such as drive train clearance, guideway
clearance, mechanical deformations, friction and loose
joints. The three types of hysteresis are setup, machine
and probe.
IJK A three-dimensional line that defines the direction of a
vector. The directional components (cosine) of a vector
in XYZ space.
Included Angle An angle of less than 180° that is located between
vectors.
Input The information entered into a computer system.
Inspect To manually check a part, not using the DCC mode of
the machine. A mode where the operator uses all mea-
surement capabilities yet does not save the steps to a part
file.
Intersection The creation of new geometric elements when two
existing geometric elements cross each other.
Joystick A lever on the joystick box used to control the move-
ment of the axes of the CMM.
Keyboard A part of the workstation resembling a typewriter used
for communicating with the computer.
Laser Laser interferometers are used to determine scale
accuracy of Coordinate Machines as well as to check
geometry. They are considered an absolute length
standards, since they use the unchanging wavelength of
light.
Learn To manually inspect a part with all moves and measure-
ments being saved for future use under a specifically
named program.
Least Square The interpolation of a function to all points in a given
Method data set.
Glossary
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