Operation Manual

HEIDENHAIN CNC PILOT 4290 269
4.27 Milling Cycles
R Radius of approaching/departing arc (default: 0)
 R=0: Contour element is approached directly; infeed to
starting point above the milling plane, then vertical plunge.
 R>0: Tool moves on approaching/departing arc that
connects tangentially to the contour element.
 R<0 for inside corners: Tool moves on approaching/
departing arc that connects tangentially to the contour
element.
 R<0 for outside corners: Contour element is approached/
departed tangentially on a line
P Milling depth. Plunging depth of the tool
K Retraction plane (default: back to starting position)
 Front or rear face: Retraction position in Z direction
 Lateral surface: Retraction position in X direction (diameter)
B Chamfer width when deburring the edges
J Preparation diameter For open contours, the contour to be
deburred is calculated from the programmed contour and J.
The following rules apply:
 J programmed: The cycle deburrs both sides of the slot
(see 1 in the illustration).
 J not programmed: The deburring tool is so wide that both
sides of the slot are deburred in one pass (see 2 in the
illustration).
D Starting element number when partial figures are machined.
V End element number when partial figures are machined.
The direction of contour definition for figures is
counterclockwise. The first contour element for figures:
 Circular slot: The larger arc
 Full circle: The upper semicircle
 Rectangles, polygons and linear slots: The orientation angle
points to the first contour element.
A Sequence for “Milling, deburring”: A=0 (default=0)
Parameters – deburring