Operation Manual

HEIDENHAIN CNC PILOT 640 211
4.4 Turning cycles
Second step:
The area that was left out in the first step (shaded area in the figure) is
machined with the cycle Plunge, longitudinal—expanded. Before
executing this step, you must change tools.
The rounding arcs in the contour valley are also machined in "expanded
mode."
The parameters for contour starting point X1, Z1 and contour end
point X2, Z2 determine the cutting and infeed directions—in this
example, external machining and infeed in negative X-axis direction.
The parameter for the contour starting point Z1 was determined
during simulation of the first step.
Tool data
 Turning tool (for external machining)
 TO = 3 (tool orientation)
 A = 93° (tool angle)
 B = 55° (point angle)