HEIDENHAIN MANUALplus 620 341
4.26 Milling Cycles
Q0 (from the inside toward the outside):
– Linear slot, rectangle, polygon: Reference point of the
figure
– Circle: Circle center
– Circular slot, “free” contour: Starting point of the
innermost milling path
Q1 (from the outside toward the inside):
– Linear slot: Starting point of the slot
– Circular slot, circle: Not machined
– Rectangle, polygon: Starting point of the first linear
element
– “Free” contour: Starting point of the first linear element
(at least one linear element must exist)
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 reverse 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= position 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
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