Siemens SINUMERIK 840D sl Function Manual page 1836

Detailed Description
2.3 Tool cutting edge
Basic length 1 to 3
In order that the discrepancy between the toolholder reference point F and the toolholder
reference point F' can be corrected on the three geometry axes (three dimensional), all 3
basic lengths are active irrespective of the tool type. In other words, a twist drill (tool type
200) with a tool length compensation (length 1) can also have a tool base dimension/adapter
dimension in 3 axes.
Note
Please refer to the following documentation for more information about base-
dimension/adapter-dimension tool length compensation:
References:
/PG/Programming Manual Fundamentals
2.3.9 Technology - tool clearance angle (tool parameter 24)
Meaning
Certain turning cycles, in which traversing motions with tool clearance are generated,
monitor the tool clearance angle of the active tool for possible contour violations.
Value range
The angle (0 to 90° with no leading sign) is entered in tool parameter 24 as the tool
clearance angle.
Figure 2-12
48
Tool clearance angle of the turning tool during relief cutting
Basic logic functions: Tool Offset (W1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0