A CALIBRATION TOOL, A ROBOT UNIT AND A METHOD FOR SETTING THE ORIENTATION OF A ROBOT ARM TO A PREDETERMINED ORIENTATION

摘要

A calibration tool (14) for a robot arm (2). The calibration tool comprises a calibration element (15), a calibration guide (30) and a calibration reference member (32). The robot arm comprises an outer robot arm (4), an inner robot arm (6), an output member (8), a first joint (10) permitting the outer robot arm to be rotated around a first rotation axis (R1), a second joint (12) permitting the output member to be rotated around a second rotation axis (R2). The calibration reference member is attached to the inner robot arm. The calibration guide is configured to be brought into engagement with the calibration reference member by means of rotation of the outer robot arm around the first rotation axis and the output member around the second rotation axis so that the orientations of the outer robot arm and the output member are set to the predetermined orientation.