HEIDENHAIN SW 54843x-03 DIN Programming - Manual (Page 290)

290 DIN Programming
4.1
7
Cont
our
-based t
u
rn
ing cy
cles
Finish contour G890
G890 finishes the defined contour area in one pass. The reference to
the contour to be machined can be transferred in the cycle
parameters, or the contour can be defined directly after the cycle call
(see „Working with contour-based cycles” on page 270). The contour
to be machined can contain various valleys. If required, the area to be
machined is divided into several sections.
Parameters
ID
Auxiliary contour—ID number of the contour to be machined
NS Starting block number (beginning of contour section)
NE End block number (end of contour section)
 NE not programmed: The contour element NS is machined
in the direction of contour definition.
 NS=NE programmed: The contour element NS is machined
opposite to the direction of contour definition.
E Plunging behavior
 E=0: Descending contours are not machined
 E>0: Plunging feed rate
 No input: Descending contours are machined at
programmed feed rate
V Identifier beginning/end (default: 0). A chamfer/rounding arc is
machined:
 0: At beginning and end
 1: At beginning
 2: At end
 3: No machining
 4: Chamfer/rounding arc is machined—not the basic
element (prerequisite: contour section with one element)
Q Type of approach (default: 0)
 0: Automatic selection—the Steuerung checks:
 Diagonal approach
 First X, then Z direction
 Equidistant around the barrier
 Omission of the first contour elements if the starting
position is inaccessible
 1: First X, then Z direction
 2: First Z, then X direction
 3: No approach—tool is located near the starting point of the
contour area.