Siemens SINUMERIK 840D sl Function Manual

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Sequence1. Initial situation: Neither of the measuring systems are referenced:DB31, ... DBX60.4 = 0 (referenced / synchronized 1)DB31, ... DBX60.5 = 0 (referenced / synchronized 2)2. Reference the indirect measuring system according to the measuring system type:DB31, ... DBX60.4 = 1 (referenced / synchronized 1)DB31, ... DBX60.5 = 0 (referenced / synchronized 2)3. Traverse the machine axis across the parameterized number of reference marks.This automatically references the direct measuring system:DB31, ... DBX60.4 = 1 (referenced / synchronized 1)DB31, ... DBX60.5 = 1 (referenced / synchronized 2)15.8 Referencing in follow-up modeFunctionIncremental measuring systems and measuring systems with distance-coded reference markscan be referenced even when the machine axis is in follow-up mode. Prerequisite for this isthe correct parameterization of the reference point approach according to the used measuringsystem (see Section "Referencing with incremental measurement systems (Page 1154)" and"Referencing with distance-coded reference marks (Page 1167)").When referencing in follow-up mode the machine axis is moved not by the NC but by meansof an external travel motion over the encoder zero mark and the parameterized number ofdistance-coded reference marks. The measuring system is referenced when the encoder zeromark or parameterized number of distance-coded reference marks are detected.NoteReproducibility of the referencing resultIn NC-guided reference point approach, reproducibility of the referencing result is ensuredthrough adherence to the assigned traverse velocities during the referencing operation. Duringreferencing in follow-up mode, responsibility for achieving reproducibility of the referencingresults lies with the machine manufacturer / user.Unique zero markReferencing of an incremental measuring system is based on the explicit position of theencoder zero mark relative to the overall traversing range of the machine axis.Because the reference cam signal is not evaluated by the NC during referencing in follow-upmode, unique identification of the reference point when referencing in follow-up mode will onlyresult with:● Only one encoder zero mark in the traversing range of the machine axis.● Linear measuring systems with distance-coded reference marks.● Modulo rotary axes (absolute position within one revolution).R1: Referencing15.8 Referencing in follow-up modeBasic Functions1176 Function Manual, 01/2015, 6FC5397-0BP40-5BA2