HEIDENHAIN TNC 640 User Manual page 152

4
Tool coordinate system T-CS
The tool coordinate system is a 3-D Cartesian coordinate system.
Its coordinate origin is the tool reference point. The values of the
tool table, L and R with milling tools and ZL, XL and YL with turning
tools, reference this point.
Further information:
page 238 and "Tool data", page 638
For dynamic collision monitoring (option 40) to correctly
monitor the tool, the values in the tool table must
correspond to the actual dimensions of the tool.
In accordance with the values from the tool table, the coordinate
origin of the tool coordinate system is shifted to the tool center
point TCP . TCP stands for Tool Center Point.
If the NC program does not reference the tool tip, the tool center
point must be shifted. The required shift is implemented in the NC
program using the delta values during a tool call.
The position of the TCP as shown in the diagram
is obligatory in conjunction with the 3-D tool
compensation.
With the aid of positioning blocks in the input coordinate
system, the user defines the position of the tool and
therefore the position of the tool coordinate system.
If miscellaneous function M128 is active, the orientation of the
tool coordinate system depends on the tool's current angle of
inclination.
Tool angle of inclination in the machine coordinate system:
Example
N70 G01 X+10 Y+45 A+10 C+5 R0 M128*
152
"Entering tool data into the table",
Fundamentals, File Management | Fundamentals
TCP
R
HEIDENHAIN | TNC 640 | ISO Programming User's Manual | 10/2017
TCP TCP
TCP'
R R
W-CS
T-CS