HEIDENHAIN TNC 620 User Manual page 121

Fundamentals | NC fundamentals
Input coordinate system I-CS
The input coordinate system is a 3-D Cartesian coordinate system.
The position and orientation of the input coordinate system depend
on the active transformations in the working plane coordinate
system.
Without active transformations in the working plane
coordinate system, the position and orientation of the
input coordinate system and working plane coordinate
system are identical.
In addition, there are no transformations in the workpiece
coordinate system on 3-axis machine tools or with pure
3-axis machining. The BASE TRANSFORM. values of the
active line of the preset table have a direct effect on the
input coordinate system with this assumption.
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.
The NOML., ACTL., LAG, and ACTDST displays are also
based on the input coordinate system.
Positioning blocks in input coordinate system:
Paraxial positioning blocks
Positioning blocks with Cartesian or polar coordinates
Positioning blocks with Cartesian coordinates and surface
normal vectors
Example
7 X+48 R+
7 L X+48 Y+102 Z-1.5 R0
7 LN X+48 Y+102 Z-1.5 NX-0.04658107 NY0.00045007
NZ0.8848844 R0
The position of the tool coordinate system is determined
by the Cartesian coordinates X, Y and Z also for
positioning blocks with surface normal vectors.
In conjunction with 3-D tool compensation, the position
of the tool coordinate system can be shifted along the
surface normal vectors.
Orientation of the tool coordinate system can be
performed in various reference systems.
Further information: "Tool coordinate system T-CS",
Page 122
HEIDENHAIN | TNC 620 | User's Manual for Setup, Testing and Running NC Programs | 01/2022
WPL -CS
I-CS
X0
Y0
Y10
X10
X0
Y0
A contour referencing the input coordinate
system origin can easily be transformed any
3
I-CS
Y10
X10
way you need.
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