HEIDENHAIN iTNC 530 (34049x-08) ISO programming - Manual (Page 379)

HEIDENHAIN iTNC 530 379
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Limit plane
The Limit Plane function provided by the TNC is a powerful function
for different applications. This function makes it especially easy for
you to realize the following machining operations:
 Avoiding limit switch messages :
NC programs created in CAM systems often output safety
positioning movements near the limit switch range of a specific
machine. If you need to change to a smaller machine on short
notice, these positioning blocks result in interruptions of program
run. The Limit Plane function enables you to limit the traverse range
of a smaller machine so that limit switch messages are no longer
generated.
 Machining definable ranges :
During repair work that is often limited to a small range the Limit
Plane function enables you to quickly and easily define the range
with graphic support. The TNC then only machines within the
defined range.
 Machining at limit height :
The definition of a limit plane in the tool-axis direction enables you—
if only the finishing contour is available, for example—to simulate
infeeds in the negative direction by moving the limit multiple times.
The TNC executes machining operations that are defined outside
the limit, but the tool is kept at the defined limit in the tool-axis
direction.