Operation Manual

HEIDENHAIN CNC PILOT 640 269
4.5 Recessing cycles
Examples of recessing cycles
Recess outside
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.
The rounding arcs in the corners of the contour valley and the oblique
surfaces at the contour start and end are also machined in "expanded
mode."
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, external machining and infeed in negative Z-axis direction.
Tool data
 Turning tool (for external machining)
 TO = 1 (tool orientation)
 SB = 4 (cutting width 4 mm)