
APPENDIXH. GLOSSARY
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Term Description
Linear acceleration/ deceleration after
cutting feed interpolation
Linear acceleration/deceleration applied to a specified cutting feedrate, in
which the post–interpolation cutting feedrate is proportional to the elapsed
time.
Linear acceleration/ deceleration before
cutting feed interpolation
Linear acceleration/deceleration applied to a specified cutting feedrate, in
which the pre–interpolation cutting feedrate is proportional to the elapsed
time.
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.
[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.