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 com-
pensation (such as tool length compensation or cutter compensation) are speci-
fied independently. The CNC determines the actual tool path by correcting 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.
Pulse frequency override Manual control in which the operator can temporarily change the laser pulse fre-
quency during operation, to vary the laser output power. This function is used to
create the same figure with different materials or stock thicknesses.
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 during
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
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 position.
This check is used by a program that is designed to return a tool to the reference
Relative coordinate system Coordinate system established in reference to the coordinates set by the opera-
tor 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.
Retrace function Causing a tool to move back along a path which it previously traversed (reverse),
then retracing the same path again (re–forward).
Retract Automatic operation in which the tool is retracted by a programmed amount.
Return point level
Level to which a tool is retracted from the bottom of a hole being created during
the execution of a canned cycle. This is either the point R level or initial level.
Rewinding a program Locating the beginning of a program.
Rigid tapping High–precision tapping achieved by controlling spindle rotation and drill axis
feed as two–axis linear interpolation so that no tapping pitch error occurs at the
bottom of the hole during acceleration/deceleration.
Rotary axis Axis (such as A, B, or C) that rotates about a linear axis in a machine.
Rotary axis roll–over function Rounding off a rotary axis coordinate to within 360.
Rotary table dynamic fixture offset Automatically calculating an offset from a rotation center when the rotary table
rotates, thereby defining a workpiece coordinate system.
Rotational copy Repetitive machining performed by rotating a subprogram–specified shape.
Rotational handle feed around tool tip Manually feeding a tool using a handle in such a way that, when the tool direction
is changed, the tool tip is held in the same position.
RS–232–C EIA standard specifying a binary serial data interface for input/output devices.
RS–422 EIA standard specifying a binary serial data interface for input/output devices.