HEIDENHAIN SW 54843x-02 DIN Programming - Manual (Page 353)

HEIDENHAIN MANUALplus 620, CNC PILOT 640 353
4.26 Milling cy
cles
G840—Deburring
G840 deburrs when you program chamfer width B. If there is any
overlapping of the contour, specify with cycle type Q whether the first
section (as of starting point) or the entire contour is to be machined.
Program only the parameters given in the following table.
Parameters—Deburring
Q
Cycle type (= milling location).
 Open contour. If there is any overlapping, Q defines whether
the first section (as of starting point) or the entire contour is
to be machined.
 Q=0: Center of milling cutter on the contour (without TRC)
 Q=1: Machining at the left of the contour. If there is any
overlapping, G840 machines only the first section of the
contour (starting point: 1st point of intersection).
 Q=2: Machining at the right of the contour. If there is any
overlapping, G840 machines only the first section of the
contour (starting point: 1st point of intersection).
 Q=3: The contour is machined to the left or right
depending on H and the direction of cutter rotation (see
table). If there is any overlapping, G840 machines only the
first section of the contour (starting point: 1st point of
intersection).
 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: Center of milling cutter on the contour (hole position
= starting point)
 Q=1: Inside milling
 Q=2: Outside milling
 Q=3 to 5: Not allowed
ID Milling contour—name of the contour to be milled
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
 NS=NE programmed: Machining against the contour
direction
E Reduced feed rate for circular elements (default: current feed
rate)