HEIDENHAIN CNC Pilot 4290 V7.1 - Manual (Page 268)

268
4.27 Milling Cy
cles
G840 – Deburring
G840 deburrs when you program chamfer width B. If there is any
overlapping of the contour, specify with Q whether the first area (as of
starting point) or the entire contour is to be machined. Program only
the parameters given in the following list.
B
P
J B
P
1 2
Parameters – deburring
Q Cycle type (= milling location)
„ Open contour
„ Q=0: Milling center on the contour. Q0 deburrs the slot in
one pass on the previously open or closed contour.
„ Q=1: Machining at the left of the contour. If there is
overlapping, G840 machines only the first area of the
contour.
„ Q=2: Machining at the right of the contour. If there is
overlapping, G840 machines only the first area of the
contour.
„ Q=3: The contour is machined to the left or right
depending on H and the direction of cutter rotation (see
“G840 – Milling” on page 263). If there is overlapping,
G840 machines only the first area of the contour.
„ Q=4: Machining at the left of the contour. If there is
overlapping, G840 machines the entire contour.
„ Q=5: Machining at the right of the contour. If there is
overlapping, G840 machines the entire contour.
„ Closed contours
„ Q=0: Milling center on the contour
„ Q=1: Inside milling
„ Q=2: Outside milling
NS Block number—beginning of contour section
„ Figures: Block number of the figure
„ Free open or closed contour: First contour element (not
starting point)
NE Block number—end of contour section
„ Figures, free closed contour: No input
„ Free open contour: Last contour element
„ Contour consists of one element:
„ No input: Machining in contour direction
„ NE programmed: Machining against the contour direction
E Reduced feed rate for circular elements (default: current feed
rate)