HEIDENHAIN TNC 620 (81760x-01) Cycle programming - Manual (Page 228)

Fixed Cycles: Contour Pocket with Contour Formula
9.2 SL cycles with simple contour formula
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TNC 620 | User's Manual Cycle Programming | 3/2014
Entering a simple contour formula
You can use soft keys to interlink various contours in a
mathematical formula.
Show the soft-key row with special functions
Select the menu for functions for contour and
point machining
Press the
contour def soft key. The TNC opens
the dialog for entering the contour formula
Enter the name of the first subcontour. The first
subcontour must always be the deepest pocket.
Confirm with the
ENT key
Specify via soft key whether the next subcontour
is a pocket or an island. Confirm with the
ENT key
Enter the name of the second subcontour.
Confirm with the
ENT key
If needed, enter the depth of the second
subcontour. Confirm with the
ENT key
Carry on with the dialog as described above until
you have entered all subcontours.
Always start the list of subcontours with the deepest
pocket!
If the contour is defined as an island, the TNC
interprets the entered depth as the island height. The
entered value (without an algebraic sign) then refers
to the workpiece top surface!
If the depth is entered as 0, then for pockets the
depth defined in the Cycle 20 is effective. Islands
then rise up to the workpiece top surface!
Contour machining with SL Cycles
The complete contour is machined with the SL
Cycles 20 to 24 (see "Overview", page 173).