Siemens SINUMERIK 840D sl Function Manual

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Setting data SD42900 - SD42950 have no effect on the components of an active toolholderwith orientation capability. The calculation with a toolholder with orientation capability alwaysallows for a tool with its total resulting length (tool length + wear + tool base dimension). Thecalculation of the resulting total length allows for all modifications caused by the setting data.NoteWhen toolholders with orientation capability are used, it is common to define all tools for a non-mirrored basic system, even those, which are only used for mirrored machining. Whenmachining with mirrored axes, the toolholder is then rotated such that the actual position ofthe tool is described correctly. All tool-length components then automatically act in the correctdirection, dispensing with the need for control of individual component evaluation via settingdata, depending on the mirroring status of individual axes.The use of toolholders with orientation capability is also practical if the physical characteristicsof the machine type prevents tools, which are permanently installed with different orientations,from being rotated. Tool dimensioning can then be performed uniformly in a basic orientation,where the dimensions relevant for machining are calculated according to the rotations of avirtual toolholder.18.10.6 Tool lengths in the WCS, allowing for the orientationChange tool or working planeThe values displayed for the tool correspond to the expansion in the WCS. If a toolholder withan inclined clamping position is to be used, you should make sure that the transformation usedsupports the toolholder. If this is not the case, incorrect tool dimensions will be displayed. Whenchanging the working plane from G17 to G18 or G19, you should ensure that the transformationcan also be used for these working planes. If the transformation is only available for G17machining, the dimensions continue to be displayed for a tool in the Z direction after the planechange.When transformation is deactivated, the basic tool is displayed in the x, y or z direction,according to the working plane. Allowance is made for a programmed toolholder. These tooldimensions are not altered when traversing without a transformation.18.10.7 Tool length offsets in tool directionTemperature compensation in real timeOn 5-axis machines with a moving tool, temperature fluctuations can occur in the machiningheads. These can result directly in expansion fluctuations which are transmitted to the toolspindle in the form of linear expansion. A typical case on 5-axis heads, for example, is thermalexpansion in the direction of the longitudinal spindle axis.It is possible to compensate this thermal expansion even when the tool is orientated byassigning the temperature compensation values to the tool rather than to the machine axes.W1: Tool offset18.10 Special handling of tool compensationsBasic FunctionsFunction Manual, 01/2015, 6FC5397-0BP40-5BA2 1493