HEIDENHAIN SW 68894x-02 - Manual (Page 124)

124 Teach-in mode
4.1
W
o
rk
ing
with
cy
cles
Contour follow-up in Teach-in mode
The contour follow-up function updates the originally defined
workpiece blank with every machining step. The turning cycles take
the current contour of the workpiece blank into account for the
calculation of infeed and machining paths. Air cuts are avoided and
approach paths optimized.
In order to activate contour follow-up in Teach-in mode, program a
workpiece blank and select "With contour follow-up" in the RG input
parameter (see also "Workpiece blank cycles" on page 129).
Cycle run with active contour follow-up (RG: 1):
 Pressing Cycle start initiates a search for the selected cycle for mid-
program startup.
 The next Cycle start executes the M commands (e.g. direction of
rotation).
 The next Cycle start positions the tool to the last programmed
coordinates (e.g. tool change point).
 The next Cycle start runs the selected cycle.
Cycle keys
A programmed Teach-in cycle is not executed until Cycle start is
pressed. Cycle stop interrupts a running program. During thread
cutting, with a Cycle stop the tool is lifted off the contour and then
stopped. The cycle has to be restarted.
During a cycle interruption you can:
 Resume cycle execution with Cycle start. The control will always
resume execution of the cycle at the point of interruption—even if
you have moved the axes in the meantime.
 Move the axes with the manual direction keys or the handwheel.
 Terminate the machining process with the Back soft key.
When contour follow-up is active, you can also use modal
functions, such as "Interrupted feed" or "Zero point shift."
Contour follow-up can only be used for turning operations.