HEIDENHAIN TNC 620, User Manual

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Fundamentals | NC fundamentals
3
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: "Entering tool data into the table", Page 135
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).
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 3D 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.
R R R
L
R2
R2
L
L
TCP TCP TCP
TCP‘
If the
TCPM
function or miscellaneous function
M128
is active, the
orientation of the tool coordinate system depends on the tool's
current angle of inclination.
The user defines the tool’s angle of inclination either in the machine
coordinate system or in the working plane coordinate system.
Tool angle of inclination in the machine coordinate system:
Example
7 L X+10 Y+45 A+10 C+5 R0 M128
Tool angle of inclination in the working plane coordinate system:
Example
6 FUNCTION TCPM F TCP AXIS SPAT PATHCTRL AXIS
7 L A+0 B+45 C+0 R0 F2500
7 LN X+48 Y+102 Z-1.5 NX-0.04658107 NY0.00045007
NZ0.8848844 TX-0.08076201 TY-0.34090025 TZ0.93600126 R0
M128
7 LN X+48 Y+102 Z-1.5 NX-0.04658107 NY0.00045007
NZ0.8848844 R0 M128
T-CS
W-CS
122
HEIDENHAIN | TNC 620 | User's Manual for Setup, Testing and Running NC Programs | 01/2022