beautypg.com

Mode of action of the programmed feed rate – HEIDENHAIN TNC 620 (81760x-02) User Manual

Page 446

background image

Programming: Multiple axis machining

12.5 FUNCTION TCPM (option 9)

12

446

TNC 620 | User's Manual

HEIDENHAIN Conversational Programming | 2/2015

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 ...

Feed rate refers to the tool tip

14 FUNCTION TCPM F CONT ...

Feed rate is interpreted as the speed of the tool along the

contour

...

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