Basic Tool Orientation - Siemens SINUMERIK 828D Function Manual

18.9

Basic tool orientation

Application
Normally, the orientation assigned to the tool itself depends exclusively on the active machining plane. For
example, the tool orientation is parallel to Z with G17, parallel to Y with G18 and parallel to X with G19.
Different tool orientations can only be programmed by activating a 5­axis transformation. The following system
variables have been introduced in order to assign a separate orientation to each tool cutting edge:
System variable Description of tool orientation
$TC_DPV[t, d] Tool cutting edge orientation
$TC_DPV3[t, d] L1 component of tool orientation
$TC_DPV4[t, d] L2 component of tool orientation
$TC_DPV5[t, d] L3 component of tool orientation
Indexing: Same as tool system variable $TC_DPx[t, d]
t: T number of cutting edge
d: D number of cutting edge
Identifiers $TC_DPV3 to $TC_DPV5 are analogous to identifiers $TC_DP3 to $TC_DP5 of the tool length
components.
MD18114
The system variables for describing the tool orientation are only available if machine data is not equal to zero:
MD18114 $MN_MM_ENABLE_TOOL_ORIENT (assign orientation to tool cutting)
MD18114 $MN_MM_ENABLE_TOOL_ORIENT
Value = 1 Only system variable $TC_DPV[t, d] is available.
Value = 2 All four system variables are available.
Define direction vector
If all four system variables contain 0, the orientation is defined only by the active plane (as before).
If system variable $TC_DPV[t, d] is equal to zero, the other three parameters - if available - define a direction
vector. The amount of the vector is insignificant.
Example:
$TC_DPV[1, 1] = 0
$TC_DPV3[1, 1] = 1.0
$TC_DPV4[1, 1] = 0.0
$TC_DPV5[1, 1] = 1.0
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
18.9 Basic tool orientation
Format Preassignment
0
INT
0
REAL
0
REAL
0
REAL
W1: Tool offset
1541