HEIDENHAIN SW 68894x-03 - Manual (Page 270)

270 Teach-in mode
4.5 Recessing cy
cles
Recess inside
The machining operation is to be executed first with the Recessing,
radial—expanded
cycle, taking oversizes into account. This contour
area is to be finished subsequently with Recessing radial,
finishing—expanded.
Since the recessing width P is not entered, the CNC PILOT plunge-
cuts with 80 % of the recessing width of the tool.
In expanded mode, the chamfers are machined at the start/end of the
contour.
Be sure to enter the correct values for the parameters contour
starting point X1, Z1
and contour end point X2, Z2. These
parameters determine the cutting and infeed directions—in this
example, internal machining and infeed in negative Z-axis direction.
Tool data
 Turning tool (for internal machining)
 TO = 7 (tool orientation)
 SB = 2 (cutting width 2 mm)