HEIDENHAIN iTNC 530 (340 49x-01) ISO programming - Manual (Page 372)

372 8 Programming: Cycles
8.7 SL Cy
cles with Cont
our F
o
rm
ula
„ For floor finishing, the tool again approaches the workpiece in a
tangential arc (for tool axis Z, for example, the arc may be in the Z/X
plane).
„ The contour is machined throughout in either climb or up-cut milling.
The machining data (such as milling depth, finishing allowance and
setup clearance) are entered as CONTOUR DATA in Cycle G120.
Selecting a program with contour definitions
With the %:CNT function you select a program with contour definitions,
from which the TNC takes the contour descriptions:
8 To select the functions for program call, press the
PGM CALL key.
8 Press the SELECT CONTOUR soft key.
8 Enter the full name of the program with the contour
definition and confirm with the END key.
Defining contour descriptions
With the DECLARE CONTOUR function you enter in a program the path for
programs from which the TNC draws the contour descriptions:
8 press the DECLARE soft key.
8 press the CONTOUR soft key.
8 Enter the number for the contour designator QC, and
confirm with the ENT key.
8 Enter the full name of the program with the contour
description and confirm with the END key.
With MP7420 you can determine where the tool is
positioned at the end of Cycles G121 to G124.
Program a %:CNT block before the SL Cycles. Cycle 14
CONTOUR GEOMETRY is no longer necessary if you use
%:CNT.
With the given contour designators QC you can include
the various contours in the contour formula.
With the DECLARE STRING function you define a text. For
the time being, this function is not evaluated.