Siemens SINUMERIK 840D sl Function Manual page 782

W5: 3D tool radius compensation - 840D sl only
23.2 Circumferential milling
Figure 23-10 Path end position and change in orientation at inside corners
Change in insertion depth
Generally speaking, the contour elements that form an inside corner are not positioned on the
plane perpendicular to the tool. This means that the contact points between the two blocks
and the tool are at different distances from the tool tip.
This means: the insertion depth (ISD) changes abruptly from the 1st to the 2nd block at an
inside corner.
To ensure that this difference in depth is not an abrupt step change, it is distributed continuously
among the blocks involved during interpolation. The depth-compensating motion is executed
in the current tool direction.
This solution prevents the contour from being violated by cylindrical tools if the length of the
tool prevents the cutter contact point on the lateral surface of the cutter leaving the range in
which machining is possible.
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Function Manual, 01/2015, 6FC5397-2BP40-5BA2
Special functions