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2.2
Tool offsets
Workpiece dimensions are programmed directly (e.g. according to the production drawing).
Therefore, tool data such as milling tool diameter, cutting edge position of the turning tool
(counterclockwise/clockwise turning tool) and tool length does not have to be taken into
consideration when creating the program.
The control corrects the travel path
When machining a workpiece, the tool paths are controlled according to the tool geometry
such that the programmed contour can be machined using any tool.
In order that the control can calculate the tool paths, the tool data must be entered in the
tool compensation memory of the control. Only the required tool (T...) and the required
offset data record (D...) are called via the NC program.
While the program is being processed, the control fetches the offset data it requires from the
tool compensation memory and corrects the tool path individually for different tools:
Cutting edges of a tool can be assigned different tool offset data records (e.g. different offset
values for the left and right cutting edge of a grooving tool).
Activation of the offset data (including the data for the tool length compensation) of a special
cutting edge is performed by calling the D number. When D0 is programmed, offsets for the
tool have no effect. A tool radius compensation must also be activated via G41/G42.
100 | Part 3
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