Siemens SINUMERIK 840D sl Function Manual

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Kinematic Transformation (M1)Chained transformationsExtended FunctionsFunction Manual, 03/2009, 6FC5397-1BP10-4BA0 5597.5.3 Special characteristics of chained transformationsTool dataA tool is always assigned to the first transformation in a chain. The subsequenttransformation then behaves as if the active tool length were zero. Only the basic toollengths set in the machine data (_BASE_TOOL_) are valid for the first transformation in thechain.ExampleThe chapter "Chained transformations" contains configuration examples for singletransformations and the transformation chains created from them.See alsoChained transformations (Page 556)7.5.4 Persistent transformationFunctionA persistent transformation is always active and has a relative effect to the other explicitlyselected transformations. Other selected transformation are computed as the first chainedtransformation in relation to the persistent transformation.Transformations such as TRANSMIT that must be selected in relation to the persistenttransformation must be parameterized in a chain with the persistent transformation by meansof TRACON. It is the first chained transformation rather than the TRACON transformationwhich is programmed in the part program.For additional programming tips seeReferences:/PGA/ Programming Manual Work Preparation; Transformations "Chained Transformation"