5238-E P-23
SECTION 2 COORDINATE SYSTEMS AND COMMANDS
2-5.
Diametric and Radial Commands
In a turning operation, the workpiece is rotated while being is machined. Due to the nature of the
turning operation, the tool cuts a circle with a radius equivalent to the distance from the center of
rotation to the tool nose position. In a program, X-axis commands specify the diameter of the circle
to be cut. If a command of "X100" is specified, for example, the actual position data displayed on
the screen is "100" and the workpiece is machined to a cylinder of 100-mm diameter.
In compound operations, commands in the X-axis direction are specified as diametric values too,
although this type of operation is not a turning operation. In the coordinate conversion mode,
however, the radial values (actual length in an orthogonal coordinate system) must be specified for
both X- and Y-axis commands.
