ABB IRB 920, Product Specification

Page: 26 / 58

1.4.3 Absolute Accuracy option
Purpose
Absolute Accuracy is a calibration concept that improves TCP accuracy. The
difference between an ideal robot and a real robot can be several millimeters,
resulting from mechanical tolerances and deflection in the robot structure.
Absolute
Accuracy compensates for these differences.
Here are some examples of when this accuracy is important:
• Exchangeability of robots
• Offline programming with no or minimum touch-up
• Online programming with accurate movement and reorientation of tool
• Programming with accurate offset movement in relation to eg. vision system
or offset programming
• Re-use of programs between applications
The option Absolute Accuracy is integrated in the controller algorithms and does
not need external equipment or calculation.
Note
The performance data is applicable to the corresponding RobotWare version of
the individual robot.
xx2100001110
What is included
Every Absolute Accuracy robot is delivered with:
• compensation parameters saved on the robot’s serial measurement board
• a birth certificate representing the Absolute Accuracy measurement protocol
for the calibration and verification sequence.
A robot with Absolute Accuracy calibration has a label with this information on the
manipulator.
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26 Product specification - IRB 920
3HAC075723-001 Revision: A
© Copyright 2021 ABB. All rights reserved.
1 Description
1.4.3 Absolute Accuracy option