Fanuc Series 15i/150i-MA (Programming) Operators Manual

14.COMPENSATION FUNCTION PROGRAMMING B-63324EN/03
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- If interference avoidance is judged as being dangerous
In the acute-angle pocketing shown below, interference is detected
between the vector at the end point of block 1 and that at the end point
of block 2, and an attempt is made to calculate an intersection vector
between the post-compensation path for block 1 and the post-
compensation path for block 3 for interference avoidance. In this case,
interference avoidance is assumed as being dangerous if the direction
of the post-avoidance path will differ considerably from the original
path (between 90 degree and 270 degree). So, an alarm (PS0278) is
displayed and tool movement is stopped immediately before block 1.
In machining a pocket that is wider toward the bottom, as shown below,
interference is detected between the vector at the end point of block 1
and that at the end point of block 2. An attempt is made to calculate an
intersection vector between the post-compensation path for block 1 and
the post-compensation path for block 3 for interference avoidance. In
this case, the post-avoidance path will result in overcutting, compared
with the original path, because the relationship between blocks 1 and 3
is judged as being "outside." This interference avoidance is also
judged as being dangerous. So, an alarm (PS0278) is displayed and
tool movement is stopped immediately before block 1.
Tool center path
Programmed path
Block
1
Block 2
Block
3
Stopped
Post-compensation between the paths
specified in blocks 1 and 3

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