HEIDENHAIN TNC 620 User Manual page 458

12
Programming: Multi-Axis Machining
12.5 FUNCTION TCPM
Mode of action of the programmed feed rate
The TNC provides two functions for defining the mode of action of
the programmed feed rate:
F TCP determines that the programmed feed
rate is interpreted as the actual relative velocity
between the tool point (TCP = Tool Center Point)
and the workpiece.
F CONT determines that the programmed feed
rate is interpreted as the contouring feed rate of
the axis programmed in the respective NC block.
Example NC blocks
...
13 FUNCTION TCPM F TCP ...
14 FUNCTION TCPM F CONT ...
...
Interpretation of the programmed rotary axis
coordinates
Up to now, machines with 45° swivel heads or 45° tilting tables
could not easily set the angle of inclination or a tool orientation
with respect to the currently active coordinate system (spatial
angle). This function could only be realized through specially written
programs with normal vectors (LN blocks).
The TNC now provides the following function:
AXIS POS determines that the TNC interprets the
programmed coordinates of rotary axes as the
nominal position of the respective axis
AXIS SPAT determines that the TNC interprets the
programmed coordinates of rotary axes as the
spatial angle
458
Feed rate refers to the tool tip
Feed rate is interpreted as the speed of the tool along the
contour
HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2015