Sl Cycles - HEIDENHAIN TNC 370 User Manual

8 Cycles
4
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:
l
A contour can consist of superimposed subcontours. Pockets and
islands compose the subcontours.
l
The subcontours are entered as subprograms.
l
The control automatically superimposes the subcontours and calcu-
lates the points at which they intersect.
Cycle 14 CONTOUR GEOMETRY contains the subcontour list and is a
purely geometric cycle, with 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 programmed 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+O R+3
TOOL CALL 1 Z S 1000
CYCL DEF 14.0 CONTOUR GEOM.
CYCL DEF 14.1 CONTOUR LABEL l/2/3
.
.
L.:..M2
LBL 1
cc x+20 V+lO
All other coordinates are then ignored.
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TNC 370 -