
APPENDIX
I. GLOSSARY
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Term Description
Linear axis Axis along which a machine element moves linearly with the X–, Y–, or Z–axis
of the machine coordinate system, or axis parallel to that axis.
Linear copy Repetitive machining performed by moving a subprogram–specified figure in
parallel.
Linear interpolation Obtaining a path necessary to move the tool along a straight line.
Linear interpolation type positioning Positioning in which the tool path coincides with a path obtained by linear
interpolation.
Load meter display Representing as a bar graph, the load ratio of a servo motor or spindle motor
relative to its rated load as 100%.
Local coordinate system Coordinate system defined in a workpiece coordinate system in order to facili-
tate programming based on the workpiece coordinate system.
Local variable Macro variable that can be independently used in individual custom macro
program.
Look–ahead control Enabling high–speed, high–precision machining by suppressing acceleration/
deceleration delays and servo delays that would otherwise become larger
with increases in the feedrate.
[M]
M code Coded number, following the M address, that specifies a miscellaneous func-
tion.
M code group check function Checking that the combination of M codes specified in a block is valid.
M code group function Displaying M codes by group and checking that the combination of M codes
specified in a block is valid.
M codes for tool post synchronization M code that causes a tool post to wait for another during machining.
M function Specifying machine operations such as start and stop of the spindle and the
end of a program.
Machine coordinate system Coordinate system whose origin is defined as being the machine zero point, a
machine–specific point which acts as a reference point for the machine
Machine lock Changing position displays, without moving the controlled axes, for program
checking.
Machining time stamp function Measuring the time required to execute a program, on a memory operation
basis, and displaying the measured time on the CNC screen. The measured
time is written as a comment in the program.
Macro call Calling a custom macro program for execution, passing parameters.
Macro compiler/macro executer Programs used to convert a custom macro source to an executable form
(macro compiler), save the conversion results into ROM, and execute them
(macro executer).
Macro statement Block containing a calculation command, control command, or macro call
command.
Macro variable Variable used in a custom macro program.
Main program Set of instructions that form the main part of a program. This term is used in
contrast to the term subprogram.
Manual absolute on and off Manual intervention for selecting whether to add the amount of movement
caused by manual operation to the coordinates (current position in a work-
piece coordinate system) handled by the CNC.
Manual feed in specified direction Feeding a controlled axis manually in any specified direction.