Siemens SINUMERIK 840D sl Function Manual

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Further explanationsIf the tool length components are parallel to the geometry axes, the axis indices assigned tolength components L1 to L3 are returned in the _AXIND array.If a tool length component points in the negative axis direction, the associated axis indexcontains a minus sign. In this case, the return value (status) is 0. If an axis does not exist, theassociated return value is 0. The assignment can also be read from the _MATRIX parameter.Six of the nine matrix elements are then zero, and three elements contain the value +1 or -1.NoteIn the TCS, all tool length components are always parallel or antiparallel to the axes.The components can only be antiparallel when mirroring is active and the following settingdata is activated:SD42900 $SC_MIRROR_TOOL_LENGTH (sign change tool length when mirroring)If not all length components are parallel or antiparallel to the geometry axes, the index of theaxis, which contains the largest part of a tool length component, is returned in _AXIND. In thiscase (if the function does not return an error for a different reason), the return value is 1. Themapping of tool length components L1 to L3 onto geometry axes 1 to 3 is then describedcompletely by the contents of the 3rd parameter _MATRIX.The _COORD parameter can be used to specify, which coordinate system is to be used forthe geometry axes. If the _COORD parameter is not specified (notation LENTOAX(_AXIND,_MATRIX)), the WCS is used (default).Example:Standard situation: milling tool with G17L1 applies in Z (applicate), L2 applies in Y (ordinate), L3 applies in X (abscissa).Function call in the form:Status = LENTOAX(_AXIND, _MATRIX, "WCS")The result parameter _AXIND contains the values:_AXIND[0] = 3_AXIND[1] = 2_AXIND[2] = 1Or, in short: ( 3, 2, 1)In this case, the associated matrix _MATRIX is:B0$75,; A change from G17 to G18 or G19 does not alter the result, because the assignment of thelength components to the geometry axes changes in the same way as the assignment of theabscissa, ordinate and applicate.W1: Tool offset18.13 Tool lengths L1, L2, L3 assignment: LENTOAXBasic FunctionsFunction Manual, 01/2015, 6FC5397-0BP40-5BA2 1533