HEIDENHAIN TNC 640 User Manual page 608

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Dist. tool tip – center of rot. (incremental): The DIST
parameter shifts the center of rotation of the movement relative
to the current position of the tool tip.
If the tool is already at the given distance to the workpiece
before positioning, then the tool is at the same relative
position after positioning (see figure at center right,
If the tool is not at the given distance to the workpiece
before positioning, then the tool is offset relatively from the
original position after positioning (see figure at bottom right,
1 = DIST)
The control tilts the tool (or table) relative to the tool tip.
Feed rate? F=: Contour speed at which the tool should be
positioned
Retraction length in the tool axis?: The retraction path MB
is effective incrementally from the current tool position in the
active tool axis direction that the control approaches
tilting. MB MAX positions the tool just before the software limit
switch.
608
Multiple-Axis Machining | The PLANE function: Tilting the working plane (option 8)
HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
1 = DIST)
before