HEIDENHAIN TNC 370 - 8.1 General Overview of Cycles

8
Cycles
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8.1 General Overview of Cycles
Frequently recurring machining sequences that comprise several steps are
stored in the TNC as cycles. Coordinate transformations and other special
functions are also available as cycles.
The cycles are divided into several groups:
Cycles for pecking, reaming, boring and
tapping (Section 8.2)
Cycles for milling pockets, studs and slots
(Section 8.3)
Cycles for generating hole patterns, such as circular
or linear patterns (Section 8.4)
Cycles for multipass milling flat or twisted surfaces
(Section 8.5)
SL (Subcontour List) cycles, which allow machining
of relatively complex contours composed of several
overlapping subcontours (Section 8.6)
Coordinate transformation cycles which enable datum
shift, rotation, mirror image, enlarging and reducing
for various contours (Section 8.7)
TRANSF. 1
Special cycles such as dwell time, program call and
oriented spindle stop (Section 8.8)
Fixed cycles from cycle 200 on use Q parameters as transfer parameters.
Parameters that are required in several cycles always have the same
number. For instance, Q200 is always assigned the setup clearance, Q202
the pecking depth, etc. When a new cycle is defined the TNC offers the
last programmed values as the default value.
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TNC 370