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SECTION 2 COORDINATE SYSTEMS AND COMMANDS
1.
Coordinate Systems
1-1.
Coordinate Systems and Values
To move the tool to a target position, the reference coordinate system must be set first to define the
target position, and the target position is defined by coordinate values in the set coordinate system.
There are the three types of coordinate system indicated below. A program coordinate system is
used for programming.
•
Encoder coordinate system
•
Machine coordinate system
•
Program coordinate system
1-2.
Encoder Coordinate System
An encoder is used to detect the position of a numerically controlled axis. The encoder coordinate
system is established based on the position data output by the encoder.
The position data directly output from the encoder is not displayed on the screen, and this
coordinate system may be disregarded in daily operation.
1-3.
Machine Coordinate System
The reference point in the machine is referred to as the machine zero and the coordinate system
which has its origin at the machine zero is called the machine coordinate system. The machine zero
is set for each individual machine using system parameters and it is not necessary to change the
setting after the installation of the machine.
If "0" is set for the encoder zero point offset (system parameter), the machine coordinate system
agrees with the encoder coordinate system.
1-4.
Program Coordinate System
The coordinate system used as the reference for program commands is called the program
coordinate system.
The position of the origin of the program coordinate system varies according to the kind of
workpieces to be machined and the origin is set at the required position by setting the zero offset
data. The program coordinate system used for machining a specific kind of workpiece is thus
defined based on the set origin.
SECTION 2 COORDINATE SYSTEMS AND COMMANDS
5238-E P-16
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