Siemens SINUMERIK 840D sl Function Manual page 264

K9: Collision avoidance - only 840D sl
7.1 Function description
Compensations
The various compensation functions of the NC – for instance, temperature, spindle and pitch
error and sag compensation – ensure that positions programmed in the workpiece coordinate
system are actually assumed in the machine coordinate system. The collision avoidance takes
into account the position corrections made by the compensation functions.
Risk of collision
If compensations are used for other purposes, e.g. in order to implement axis couplings in
the machine coordinate system, the collision avoidance working with position setpoints can
no longer be performed reliably. There is a risk of collision.
Actual value offset in the machine coordinate system with PRESETON
With active collision avoidance and use of an actual value offset in the machine coordinate
system with PRESETON, it is the sole responsibility of the user to ensure that the geometric
model of the collision avoidance remains consistent.
Risk of collision
If an actual value offset is made in the machine coordinate system with PRESETON and the
geometric model of the collision avoidance not adapted accordingly, the collision avoidance
working with position setpoints can no longer be performed reliably. There is a risk of collision.
Block search
For the following types of block search there are no collision calculations carried out:
● Type 1: Block search without calculation
● Type 2: Block search with calculation at the contour
● Type 4: Block search with calculation at block end point
With the following type of block search collision calculations are carried out (in the
preprocessing) for:
● Type 5: Block search with calculation in "Program test" (SERUPRO) mode
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WARNING
WARNING
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
Special functions