Siemens Sinumerik 840D sl Programming Manual page 432

Tool offsets
7.5 Activate 3D tool offsets (CUT3DC..., CUT3DF...)
Example
Tool dimensions of a toroidal miller with reduced radius as compared with the standard tool.
Tool type
Standard tool with corner rounding
Real tool with corner rounding:
Tool types 121 and 131 torus milling tool
(shaft milling tool)
In this example, both $TC_DP15 + OFFN and $TC_DP16 are negative.
The tool type ($TC_DP1) is evaluated.
Only cutter types with cylindrical shank
(cylinder or end mill), toroidal millers (types
121 and 131) and, in the limit case,
cylindrical die mills (type 110) are permitted.
All tool types of the numbers 1 - 399, with the
exception of the numbers 111 and 155 to
157, are permitted.
Further Information
Tool center point path with infeed up to the limitation surface CUT3DCCD
If a tool with a smaller radius than the appropriate standard tool is used, machining is
continued using a milling tool, which is infed in the longitudinal direction until it reaches the
bottom (base) of the pocket. The tool removes as much material from the corner formed by
the machining surface and limitation surface. This involves a machining type combining
circumferential and face milling. Analog to a tool with lower radius, for a tool with increased
radius, the infeed is in the opposite direction.
432
R = shank radius
R = $TC_DP6
R' = $TC_DP6 + $TC_DP15 + OFFN
For these approved cutter types, the corner radius r is identical to the shank
radius R. All other permitted tool types are interpreted as cylindrical cutters
and the dimensions specified for the corner rounding are not evaluated.
r = corner radius
r = $TC_DP7
r' = $TC_DP7 + $TC_DP16
Programming Manual, 02/2011, 6FC5398-2BP40-1BA0
Job planning