Operation Manual

HEIDENHAIN CNC PILOT 4290 213
4.20 Contour-Based Turning Cycles
E Approach behavior
 E=0: Descending contours are not machined.
 E>0: Plunging feed rate
 No input: Feed rate reduction depending on the plunge
angle – maximum 50%
X Cutting limit in X direction (diameter value) – (default: no
cutting limit)
Z Cutting limit in Z direction (default: no cutting limit)
H Type of departure (default: 0)
 H=0: Machines contour outline after each pass
 H=1: Retracts at 45°; contour smoothing after last pass
 H=2: Retracts at 45°; no contour smoothing
A Approach angle (reference: Z-axis) – (default: 0°/180°, parallel
to Z-axis)
W Departing angle (reference: Z-axis) – (default: 90°/270°;
perpendicular to Z-axis)
Q Type of retraction at cycle end (default: 0)
 Q=0: Return to starting point (first X, then Z direction)
 Q=1: Positions in front of the finished contour
 Q=2: Retracts to safety clearance and stops
V Identifier beginning/end (default: 0)
A chamfer/rounding arc is machined:
 V=0: At start and end
 V=1: At start
 V=2: At end
 V=3: No machining
 V=4: Chamfer/rounding arc is machined—not the basic
element (prerequisite: Contour section with one element)
D Omit elements. The following undercuts, relief turns and
recesses are not run (default: 0):
G22 G23
H0
G23
H1
G25
H4
G25
H5/6
G25 H7
to H9
D=0••••••
D=1•••–––
D=2••–•••
D=3••––––
D=4••–••–
“•”: Do not machine the elements
Parameters