Program number Number following the O address that is added to the beginning of a program
to discriminate it from others.
Program number search Searching through programs for one identified by a specified number, and
calling that program once located.
Program restart Resuming automatic operation from an intermediate block of the program.
Program section The part of a program between a program number and an end–of–program
Program start Symbol signifying the start of a program.
Program stop Miscellaneous function for temporarily stopping program execution.
Programmable mirror image The ability, in the part program, to command mirror image of axes(is).
Programmable parameter input Enabling a program to change parameter values. This function is used to set
pitch error compensation data, or change the maximum cutting feedrate or
cutting constants according to the machining condition.
Programmable rapid traverse override Overriding a rapid traverse rate during automatic operation by specifying the
F address followed by a number from 1 to 4 that corresponds to the override
Programmed path Tool path drawn using a specific point on a cutting tool when compensation
has not been applied for that tool. In a program, a programmed tool path and
compensation (such as tool length compensation or cutter compensation) are
specified independently. The CNC determines the actual tool path by correct-
ing the programmed path according to a compensation command.
Pulse distribution Converting the amount of movement specified for each axis to a number of
pulses, according to a command issued for a tool path, and distributing the
pulses to each controlled axis.
Punch forbidden area Disabling punch commands (if any) in a safety zone.
R Plane Return position level in a hole axial direction, set up in the immediate vicinity
of a workpiece, in order to quicken hole machining operations when a canned
cycle is used repeatedly to machine holes.
Radius programming Programming for turning in which the amount of movement along the X–axis
(or coordinates) is represented using radiuses.
Rapid traverse Feeding the tool at a speed (rapid traverse rate) specified in the CNC when a
positioning command is issued.
Rapid traverse override Manual control in which the operator can change the rapid traverse rate dur-
Reader/puncher interface Interface between an input/output device and the CNC.
Reference position Specific position on the machine along an axis, relative to the origin of a
machine coordinate system.
Reference position return Moving a specified axis to the reference position.
Reference position return check Checking that the tool has been successfully returned to the reference posi-
tion. This check is used by a program that is designed to return a tool to the
Relative coordinate system Coordinate system established in reference to the coordinates set by the
operator using the CNC.
Repeat search Searching for an address or word again by using the repeat key.
Reset state Initial state defined for a device.