HEIDENHAIN SW 54843x-03 DIN Programming - Manual (Page 535)

HEIDENHAIN MANUALplus 620, CNC PILOT 640 535
6.7 Milling cy
cles f
o
r the Y axis
O=6, 7 (reciprocating circular plunge): The tool plunges at
the plunging angle "W" and mills a circular arc of 90°. The cycle
then mills along this path in the opposite direction. As soon as
it reaches the milling depth "P," the cycle switches to face
milling. "WE" defines the arc center, "WB" the arc radius.
 O=6—manually: The tool position corresponds to the center
of the circular arc. The tool moves to the arc starting point
and plunges.
 O=7—automatically (only permitted for circular slots and
circles): The cycle calculates the plunging position on the
basis of "Q":
 Q0 (from the inside toward the outside):
– Circular slot: The circular arc lies on the curvature radius
of the slot
– Circle: Not permitted
 Q1 (from the outside toward the inside): Circular slot,
circle: The circular arc lies on the outermost milling path
W Plunging angle in infeed direction
WE Orientation angle of the milling path/circular arc. Reference
axis:
 Front or rear face: Positive XK axis
 Lateral surface: Positive Z axis
Default orientation angle, depending on "O":
 O=4: WE=0°
 O=5 and
 Linear slot, rectangle, polygon: WE= orientation angle of
the figure
 Circular slot, circle: WE=0°
 "Free" contour and Q0 (from the inside toward the
outside): WE=0°
 "Free" contour and Q1 (from the outside toward the
inside): Orientation angle of the starting element
WB Plunge length/plunge diameter (default: 1.5 * milling diameter)
Parameters—Milling