ABB IRB 6400R Product On-Line Manual page 25

Coordinate systems
Z
Z
Y
World coordinates
X
Figure 9 The coordinate systems, used to make jogging and off-line programming easier.
The world coordinate system defines a reference to the floor, which is the starting
point for the other coordinate systems. Using this coordinate system, it is possible to
relate the robot position to a fixed point in the workshop. The world coordinate system
is also very useful when two robots work together or when using a robot carrier.
The base coordinate system is attached to the base mounting surface of the robot.
The tool coordinate system specifies the tool's centre point and orientation.
The user coordinate system specifies the position of a fixture or workpiece
manipulator.
The object coordinate system specifies how a workpiece is positioned in a fixture or
workpiece manipulator.
The coordinate systems can be programmed by specifying numeric values or jogging
the robot through a number of positions (the tool does not have to be removed).
Each position is specified in object coordinates with respect to the tool's position and
orientation. This means that even if a tool is changed because it is damaged, the old
program can still be used, unchanged, by making a new definition of the tool.
If a fixture or workpiece is moved, only the user or object coordinate system has to be
redefined.
Product Specification IRB 6400R M99/BaseWare OS 3.2
Y
Tool coordinates
Z
Y
Tool Centre Point (TCP)
X
Base coordinates
X
Z
Object
Z
coordinates
User
coordinates
Y
X
Description
Y
X
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