Heidenhain MANUALplus 4110 User Manual Page 28

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28 1 Introduction and Fundamentals
1.6 Tool Dimensions
1.6 Tool Dimensions
MANUALplus requires data on the specific tools for a variety of tasks,
such as positioning the axes, calculating cutting radius compensation
or proportioning of cuts.
Tool length
All position values that are programmed and displayed are referenced
to the distance between the tool tip and workpiece zero point. Since
the control only knows the absolute position of the tool carrier (slide),
it needs the dimensions XWz and ZWz to calculate and display the
position of the tool tip (see figure at upper right).
Tool compensation
The tool tip is subjected to wear during machining processes. To
compensate for this wear, MANUALplus uses compensation values
which are managed independent of the values for length. The system
automatically adds the compensation values to the values for length.
Tool-tip radius compensation (TRC)
The tip of a lathe tool has a certain radius. When machining tapers,
chamfers and radii, this results in inaccuracies which MANUALplus
compensates with its cutting radius compensation function.
Programmed paths of traverse are referenced to the theoretical tool
tip S (see figure at center right). With non-paraxial contours, this will
lead to inaccuracies during machining.
The TRC function compensates this error by calculating a new path of
traverse, the equidistant line (see figure at bottom right).
MANUALplus calculates the TRC for cycle programming. The DIN
programming feature also takes the TRC for clearance cycles into
account. During DIN programming with single paths, you can also
enable/disable TRC.
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