HEIDENHAIN TNC 360 User Manual - Manual (Page 169)

TNC 360 8-16
8 Cycles
8.3 SL Cycles
Subcontour list (SL) cycles are very powerful cycles that enable you to mill
any plane contour. They are characterized by the following features:
• A contour can consist of superimposed subcontours. Pockets and
islands compose the subcontours.
• The subcontours are programmed as subprograms.
• The control automatically superimposes the subcontours and calculates
the points of intersection of the subcontours with each other.
Cycle 14 CONTOUR GEOMETRY contains the subcontour list and is a
purely geometric cycle, containing no cutting data or infeed values.
Programming the parallel axes
Pockets and islands can also be machined in planes formed by parallel
axes.
Prerequisite:
The plane has to be perpendicular to the tool axis in TOOL CALL.
Example:
Tool axis Z or W; possible planes X/Y, U/Y, X/V, U/V
The coordinates of the desired machining plane must be in the first
coordinate block (positioning block or CC block) of the first subprogram
named in cycle 14 CONTOUR GEOMETRY.
Example:
Tool axis Z, machining plane X/V
TOOL DEF 1 L+0 R+3
TOOL CALL 1 Z S 1000
CYCL DEF 14.0 CONTOUR GEOM.
CYCL DEF 14.1 CONTOUR LABEL 1/2/3
L....M2
LBL 1
CC X+20 V+10
All other coordinates are then ignored.
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