Siemens sinumerik 840D sl Function Manual page 699

Detailed description
2.8 Actual value display
2.8 Actual value display
MCS machine coordinate system
The machine axes are displayed in mm/inch and/or degrees in MCS display mode.
WCS workpiece coordinate system
If the transformation is active, the tool tip (TCP) is specified in mm/inch and the orientation
by the RPY angles A, B and C in WCS display mode. The tool orientation results from
turning a vector in the Z direction firstly with A around the Z axis, then with B around the new
Y axis and lastly with C around the new X axis.
If the transformation is deactivated, the axes will be displayed with the channel axis
coordinates. Otherwise the geometry axis coordinates will be displayed.
2.9 Tool programming
Meaning
The tool lengths are specified in relation to the flange coordinate system. Only 3-dimensional
tool compensations are possible. Depending on the kinematic type, there are additional tool
restrictions for 5-axis and 4-axis kinematics. For a kinematic as illustrated in Fig. "5-axis NR
kinematic", only a 1-dimensional tool with lengths in the x direction is permitted.
The tool direction is dependent on the machine's initial setting, as specified with G codes
G17, G18 and G19. The tool lengths refer to the zero position specified by G17. This zero
position should not be modified in the program.
Example
An example of a 2-dimensional tool mounted on a 5-axis Scara is described below (see Fig.
"5-axis CC kinematic"). Type 100 (cutting tool) is specified as the tool identifier. The tool
lengths result from the specifications shown in Fig. "Tool length programming". X-TOOL
must be entered as tool length x and Y-TOOL must be entered as tool length y in the tool
parameters.
$TC_DP1[1,1] = 100;
$TC_DP3[1,1 ] = 0.0 ;
$TC_DP4[1,1 ] = Y-TOOL ;
$TC_DP5[1,1 ] = X-TOOL ;
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Cutting tool type
(z) Length offset vector
(y) Length offset vector
(x) Length offset vector
Special functions: Handling Transformation Package (TE4)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0