5.4 Updating revolution countersIntroductionThis section describes how to do a rough calibration of each manipulator axis byupdating the revolution counter for each axis, using the FlexPendant.Revolution indicatorThe IRB 6620/IRB 6620 LX (not Foundry version) is equipped with a revolutionindicator on axis 4.LocationThe revolution indicator is located as shown in figure.xx1500002405FunctionBefore doing an update of the revolution counter, the revolution indicator must bechecked.The green side of the indicator shall point towards axis centre.The indicatior shows if axis 4 is turned correctly or has been rotated more than±360°. If the indicator has been turned, the robot has to be jogged manually in theContinues on next page314 Product manual - IRB 6620LX3HAC035737-001 Revision: P© Copyright 2009-2018 ABB. All rights reserved.5 Calibration5.4 Updating revolution counters