Collision Monitoring (Cdon, Cdof, Cdof2) - Siemens SINUMERIK 840D sl Programming Manual

10.5

Collision monitoring (CDON, CDOF, CDOF2)

Function
With the collision detection and active tool radius compensation, the tool paths are monitored
through look-ahead contour calculation. This Look Ahead function allows possible collisions
to be detected in advance and permits the control to actively avoid them.
Collision detection can be activated or deactivated in the NC program.
Syntax
CDON
CDOF
CDOF2
Significance
CDON:
CDOF:
CDOF2:
Fundamentals
Programming Manual, 09/2011, 6FC5398-1BP40-2BA0
Command for the activation of the collision detection.
Command for the deactivation of the collision detection.
With deactivated collision detection, a search is made in the previous traversing
block (at inside corners) for a common intersection for the current block; if
necessary the search is extended to even earlier blocks .
Note:
CDOF can be used to avoid the faulty detection of bottlenecks, resulting, for
example, from missing information that is not available in the NC program.
Command for the deactivation of the collision detection during 3D
circumferential milling.
The tool offset direction is determined from adjacent block parts with CDOF2.
CDOF2 is only effective for 3D circumferential milling and has the same
significance as CDOF for all other types of machining (e.g. 3D face milling).
10.5 Collision monitoring (CDON, CDOF, CDOF2)
Tool radius compensation
313