Siemens sinumerik 840D sl Function Manual

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Contents

Brief description1.2 Curve tablesSpecial functions: Axis Couplings and ESR (M3)8 Function Manual, 11/2006, 6FC5397-2BP10-2BA01.1.2 PreconditionsCoupled motion functionThe coupled motion function forms part of the NCK software.Generic couplingThe coupled motion functionality is also available in the generic coupling.However, for basic operation of generic coupling, the following limitations apply:• The maximum number of coupled motion groupings is limited to 4.• Only 1 leading axes may be assigned to each coupled motion axis.• Cascading is not possible.NoteThese limitations do not apply when NCK software is supplied with the relevant options ofgeneric coupling (refer to "Preconditions" in the "Brief Description" of Generic Coupling).1.2 Curve tables1.2.1 FunctionThe "curve tables" function can be used to define the complex sequence of motions of anaxis in a curve table.Any axis can be defined as a leading axis and a following axis can be traversed by taking acurve table into account.The command variable in these motion sequences is an abstract master value, which isgenerated by the control or derived from an external variable (e.g. simulated position of anaxis).Creating curve tables is performed via part program sequences.The curve tables in the static NC memory remain valid after the part program has been beenclosed or after POWER DOWN.Curve tables can be saved in dynamic NC memory for faster access. Please note that tablesneed to be reloaded after run-up.Axis groupings with curve tables must be reactivated independently of the storage location ofthe curve table after POWER ON.Linear curve table segments are stored in separate areas to save memory space.