S code Coded number, following the S address, that specifies the rotational speed of the
S function Controlling the rotational speed of the spindle by specifying a number after the
Scaling Reducing or enlarging a programmed figure, using a specified point as the cen-
Scheduling function Selecting a file on an external input/output floppy device, so that automatic
operation is performed based on the specified execution sequence and speci-
fied execution count.
Second auxiliary function Auxiliary function for specifying a function such as indexing table positioning.
Selecting a workpiece coordinate system Selecting a workpiece coordinate system from those set in the CNC.
Self–diagnosis function Failure diagnostic function provided for the CNC. This function identifies
mechanical, electrical, and human errors.
Sequence number A number preceded by the N address and placed at the beginning of a program
block to identify a specific block.(need not be sequential)
Sequence number comparison and stop Searching for a block identified by a specified sequence number during program
execution, executing the target block (if found), and then stopping automatic
Sequence number search Searching a program for the block identified by a specified sequence number
and selecting that block.
Serial pulse coder Rotary detector that encodes a detected position as serial data prior to transmis-
Servo off Shutting down the power supply for a servo motor. This function is enabled by
inputting a signal to the CNC. It can be used to clamp a controlled axis mechani-
cally and to prevent a servo motor from being overloaded.
Setting a workpiece coordinate system Defining a workpiece coordinate system in the CNC.
Setting data Data that is selected and set by the user in the CNC to determine the CNC specifi-
cations, such as output data code setting, command format setting, and input/
output device selection setting.
Shutter control Opening and closing the mechanical shutter of the laser oscillator. The shutter
can be opened and closed either manually or automatically.
Significant information section The part of a program which begins at the program number and ends at the end
of the program, and from which all comments have been executed.
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 difference
in lag between the axes. The axes can be synchronized or separately controlled
based on machine input in some CNCs.
Simultaneous automatic and manual
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.