Tool Offsets; Programmed Contour And Tool Path; Tool Length Compensation - Siemens SINUMERIK 840D sl Programming Manual

2.5

Tool offsets

2.5.1

Programmed contour and tool path

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 so
that the programmed contour can be created with any tool.
So 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 offset memory, and corrects the tool path individually for different tools:
2.5.2

Tool length compensation

The tool length compensation compensates for the differences in length between the tools
used.
The tool length is the distance between the tool carrier reference point and the tool tip:
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
Fundamentals
2.5 Tool offsets
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