Siemens SINUMERIK 840D sl Function Manual

Also see for SINUMERIK 828D Turning: Diagnostic manual Function manual Equipment manual Programming manual Operating manual

"Scratching" means workpiece and tool measuring. The position of the workpiece in relationto an edge, a corner or a hole can be measured. To determine the zero position of theworkpiece or the hole, position setpoints can be added to the measured positions in the WCS.The resultant offsets can be entered in a selected frame. In tool measuring, the length or radiusof a tool can be measured using a measured reference part.Measurements can be taken via operator actions or measuring cycles. Communication withthe NCK takes place via predefined system variables. In the NCK, the calculation is made byusing a HMI operator action to activate a PI service, or by using a part-program command fromthe measuring cycles. A tool and a plane can be selected as a basis for the calculation. Thecalculated frame is entered in the result frame.10.5.8.2 Zero offset external via system framesZero offset via PLC or part programThe amount of the external zero offset can be specified through HMI and PLC via BTSS orprogrammed in the part program via the axis-specific system variable $AA_ETRANS []= .ActivationThe activation of the external zero offset takes place through the interface signal:DB31, ... DBX3.0 (accept external zero offset)BehaviorAfter the activation the respective specified axis-specific amount of the external zero offset istraversed outside for each axis with the next possible traversing block.Next possible means that enough dynamic reserves must be available for the respective axisfor traversing the zero offset. If the axis is traversed in the next traversing block after activationowing to its programming with the maximum speed, dynamic reserve is no longer available fortraversing the external zero offset.Together with the continuous path mode G64 the traversing of the offset can stretch overseveral part program blocks.Zero offset via system frameThe external zero offset can then also be managed and activated by the functionality describedabove via the system frame $P_EXTFRAME .configuringThe configuring of the external zero offset is done via the system frame $P_EXTFRAME viabit1 = 1 in the machine data: MD28082 $MC_MM_SYSTEM_FRAME_MASK = 'B0010'The amount for the external zero offset can be specified manually via the HMI user interfaceand the PLC user program via BTSS or programmed in the part program via the axial systemvariable $AA_ETRANS[].ActivationThe activation of the external zero offset takes place through the interface signal:DB31, ... DBX3.0 (accept external zero offset)BehaviorUpon activation of the external zero offset the traversing movements of all axes, exceptK2: Axis Types, Coordinate Systems, Frames10.5 FramesBasic FunctionsFunction Manual, 01/2015, 6FC5397-0BP40-5BA2 769