Siemens SINUMERIK 840D sl Function Manual page 152

W1: Tool offset
2.9 Modification of the offset data for rotatable tools
MD20360 $MC_TOOL_PARAMETER_DEF_MASK
The following bits are relevant for function "Modification of the offset data for rotatable tools".
Bit
17
18
20
21
Difference between tool tip plane and machining plane for CUTMOD or CUTMODK
The maximum permissible angle through which the tool insert can be turned away from the
machining plane (standard G18) when function CUTMOD or CUTMODK (Page 161) is called
(≙ maximum permissible deviation of γ from one of the two standard positions 0° or 180°) is set
in the setting data:
SD42998 $SC_CUTMOD_PLANE_TOL
Example:
152
Meaning
Bit 17 is used to set whether, on modification of the offset data for turning and grinding tools, the
cutting edge plane for calculating the offset values will be projected into the machining plane or
rotated.
= 0 The cutting edge plane is projected into the machining plane.
= 1 The cutting edge plane is rotated into the machining plane.
Note:
Bit 17 is only evaluated if the function is active in combination with a kinematic orientation
transformation.
Bit 18 is used to determine how the plane is defined for modification of offset data for turning and
grinding tools.
= 0 Priority is given to defining the plane with setting data SD42940
$SC_TOOL_LENGTH_CONST over defining the plane with the G commands of G
Group 6 (plane selection G17 - G19).
= 1 The active plane (G17 - G19) is always used.
If tool parameters $TC_DP10 (holder angle) and/or $TC_DP24 (clearance angle) have the
value "0", default values deviating from "0" can be used to calculate the modified cutting edge
position and the modified cutting direction.
= 0 The following default values are used:
● Holder angle 112.5° for cutting edge positions 1 - 4
● Holder angle 67.5° for cutting edge positions 5 - 8
● Clearance angle 22.5° for cutting edge positions 1 - 4
● Clearance angle 67.5° for cutting edge positions 5 - 8
= 1 An alarm is output.
Note:
Bit 20 is used to establish compatibility with older software versions.
Bit 21 is used to set whether the active total frame will be taken into account in the modification
of the offset data when tool carrier with orientation capability is active.
= 0 Rotation of the table component of the tool carrier is taken into account. Frames are
ignored.
= 1 Instead of the table component of the tool carrier, the active total frame is used. The
total frame can also contain a table component of the tool carrier.
Function Manual, 06/2019, A5E47435126B AA
Tools