HEIDENHAIN iTNC 530 (340 49x-03) smarT.NC Pilot - Manual (Page 155)

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Contour selection, saving a contour program
8 Select the mode for choosing a contour. The TNC hides the
layers shown in the left window, and the right window
becomes active for contour selection.
8 To select a contour element, click the desired contour
element with the left mouse button. The selected contour
element turns blue. At the same time, the TNC marks the
selected element with a symbol (circle or line) in the left
window.
8 To select the next contour element, click the desired
contour element with the left mouse button. The selected
contour element turns blue. If further contour elements in
the selected machining sequence are clearly selectable,
these elements turn green. Click on the last green element
to assume all elements into the contour program. The TNC
shows all selected contour elements in the left window. The
TNC displays elements that are still green in the NC column
without a check mark. This elements are not output to the
contour program when it is saved.
You must use the touchpad on the TNC keyboard or a
mouse attached via the USB port in order to select a
contour.
Select the first contour element such that approach
without collision is possible.
If the contour elements are very close to one another, use
the zoom function.