Rexroth Tightening System 350 System Documentation - Rhino ...

204/316 Bosch Rexroth AG | Tightening Technology 9 Tightening Processes9.2 Tightening program steps9.2.1 Start stepA tightening program always begins with the start step. Double clicking on the start step opens the correspondingdialog for entering the parameters.Figure 9–1:Start step dialog9.2.1.1 Step name9.2.1.2 CorrectionAngleThis entry determines the name of the start step. The name “Start” is preset, but can be changed by overwritingit.This field determines the angle and torque correction. The corresponding correction is active if the checkboxis selected (angle correction is activated as standard). It is also possible to enter correction valuesfor the torques from primary and redundancy transducers.Since the angle of turn is never measured directly on a bolt, but above the output drive, there is a smalldeviation between the measured angle and the angle on the bolt due to the torsion of the output drivefrom the torque. This deviation can be compensated for at the end of the tightening process using theangle correction. Here, the angle is only measured at the end of a tightening process once the torque fallsbelow the threshold. As the torque threshold is the starting point for angle counting 1) , the same torsionratios result at the start and end of the angle measurement, i.e. the angle is measured without torsion. Theangle value measured at the end of a tightening process after the torque has fallen below the threshold1) The number overflow in the system is at ± 214560° (± 596 rotations).System 350 | 3 608 878 040/05.2008