
APPENDIX
B–63124EN/01
I. GLOSSARY
729
Term Description
Simple call Custom macro program calling in which a call instruction is issued each time
the program is to be executed.
Simple conversational programming Creating a program according to a menu displayed on a screen.
Simple synchronous control Controlling two axes with one command, in some CNCs ignoring any differ-
ence in lag between the axes. The axes can be synchronized or separately
controlled based on machine input in some CNCs.
Simultaneous automatic and manual
operation
Simultaneously executing automatic and manual operations.
Simultaneously controlled axes Axis that can be controlled simultaneously with another.
Single block Automatic operation in which one program block is executed each time
CYCLE START is initiated.
Single direction positioning Final positioning performed in a single direction to accurately position a tool or
workpiece by excluding play, or lost motion, in the mechanical section.
Start point
Overtravel
Endpoint
Endpoint
Temporary stop
Start point
Skip function Linear interpolation (G31) in which the commanded motion and remaining
distance–to–go is discarded when a signal (skip signal) is received from out-
side the CNC. The position is saved in a system variable.
Skip signal Input signal received from outside the CNC, informing the CNC of the move-
ment end point during the execution of a skip motion command.
Slave axis Axis whose movement is synchronized with the master axis during synchro-
nous operation.
Smooth interpolation Interpolation in which a figure requiring a high degree of accuracy, such as a
corner, is machined based on programmed commands, and in which a figure
having a large radius requiring a smooth finish is machined by generating a
curve from a sequence of specified points and subsequently interpolating it.
Soft key Key displayed on the CNC display unit. Used to select a menu or command.
Software operator’s panel Software–implemented operator’s panel that enables the CRT/MDI panel to
take the place of the indicators and switches of the machine operator’s panel.
Spindle control switch function Program–controlled switching between the spindles controlled by each tool
post on a two–spindle, two–tool post machine.
Spindle orientation Stopping the spindle at a preset position.
Spindle positioning Orienting a workpiece, attached to the spindle, to a certain angle.
Spindle speed fluctuation detection func-
tion
Issuing an alarm when the actual spindle speed becomes a value higher or
lower than that specified because of a condition existing in the machine.
Spindle speed function Controlling the rotation speed of the spindle by specifying a number after the
S address.
Spiral interpolation Determining a spiral path by specifying an increment or decrement in the
number of rotations or a radius per rotation, as well as a circular interpolation
command.
Spline interpolation Determining a path for a spline curve that passes through a series of specified
points.