Siemens SINUMERIK 840D sl Programming Manual page 415

Standard tools with corner rounding
Corner rounding with a standard tool is defined by the tool parameter
parameter
with the standard tool.
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.
Job Planning
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
describes the deviation of the corner rounding of the real tool compared
$TC_DP16
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.
9.5 Activate 3D tool offsets (CUT3DC..., CUT3DF...)
r = corner radius
r = $TC_DP7
r' = $TC_DP7 + $TC_DP16
Tool offsets
. Tool
$TC_DP7
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