HEIDENHAIN iTNC 530 (340 49x-03) Pilot - Manual (Page 75)

75
SL Cycles
General Information
SL cycles are useful when you wish to machine a contour consisting of
several subcontours (up to 12 islands or pockets).
The subcontours are defined in subprograms.
When working with subcontours, always remember:
„
For a pocket the tool machines an inside contour, for an
island it is an outside contour.
„ Tool approach and departure as well as infeeds in the
tool axis cannot be programmed in SL cycles.
„ Each contour listed in Cycle 14 contour Geometry must be
a closed contour.
„
The memory capacity for programming an SL cycle is
limited. For example, you can program approximately 2048
straight-line blocks in one SL cycle.
The contour for Cycle 25 CONTOUR TRAIN must not be
closed.
Make a graphic test run before actually machining a part.
That way you can be sure that you defined the contour
correctly.
A
C D
B