Rexroth Tightening System 350 System Documentation - Rhino ...

286/316 Bosch Rexroth AG | Tightening Technology 10 Working with the System10.3 Tightening case analysisChannelProgramStepTarget functionTorque thresholdMonitoringfunctionsEvaluation + actual valuetarget function and switchoffcriteriaVisualization oftorque thresholdVisualization of target functionreached (gray)Visualization ofOK windowFigure 10–49: Example for the display of a tightening graph (torque over time) from the graph memory of the controllerNoteThe information for the torque threshold in the range above the graph (torque threshold: 16.89 Nm) is thefirst measurement value in the results storage that is above the entered torque threshold.The angle of turn is always listed consecutively in the graph display to provide a better overview. If thedirection of rotation is reversed (angle becomes physically smaller) a perpendicular, dashed blue line willbe plotted in the graph display. In some exceptional cases, an implausible representation between theangle and the plotted angle window may be caused by this.10.3.2.3 Save graphWith the function Save graph (Display → Save graph) all measurement values from the tightening programswithin the tightening sequence (before sequence end CyCmp) are sent to the BS350 and savedby the BS350 as .crv or .csv files 1) . A file name base can be assigned, which is augmented by the consecutivenumber of the tightening cycle, the ID code, or the system time to give a clear file name for eachtightening.The saved graphs can be used e.g. to archive the results or typical graph curves can be stored and usedas master curves when overlaying graphs (see the following section).10.3.2.4 Overlay graphThis function allows the comparative analysis of tightening sequences in graph form. By overlaying severalgraphs variations in the tightening sequence can be recognized.1) The .crv format is the internal format for the Tightening System 350, the format .csv (comma-separatedvalue) is also a format used e.g. in Excel, in which a measuring point is saved in each row.System 350 | 3 608 878 040/05.2008