HEIDENHAIN TNC 640 - Page 626

Multiple-Axis Machining | FUNCTION TCPM (option 9)
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HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
Mode of action of the programmed feed rate
The control provides two functions for defining the operating
method of the programmed feed rate:
F TCP determines that the programmed feed
rate is interpreted as the actual relative velocity
between the tool tip (tool center point) and the
workpiece
F CONT determines that the programmed feed
rate is interpreted as the contouring feed rate
of the axes programmed in the respective NC
block.
Example
...
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
...