HEIDENHAIN SW 54843x-03 DIN Programming - Manual (Page 352)

352 DIN Programming
4.26 Milling cy
cles
Q Cycle type (default: 0): Depending on U, the following applies:
 Contour milling (U=0)
 Q=0: Center of milling cutter on the contour
 Q=1, closed contour: Inside milling
 Q=1, open contour: Left in machining direction
 Q=2, closed contour: Outside milling
 Q=2, open contour: Right in machining direction
 Q=3, open contour: Milling location depends on "H" and
the direction of tool rotation—see help graphic
 Pocket milling (U>0)
 Q=0: From the inside toward the outside
 Q=1: From the outside toward the inside
O Roughing/finishing
 0: Roughing. With each infeed, the complete surface is
machined.
 1: Finishing. The surface is machined with the last infeed. In
all previous infeeds, the cycle machines only the contour.
 Milling depth: The cycle calculates the depth from the
Milling top edge
and the Milling floor—taking the
oversizes into account.
 Milling cutter radius compensation: Effective (except
for contour milling with Q=0).
 Approach and departure: For closed contours, the
point of the surface normal from the tool position to the
first contour element is the point of approach and
departure. If no surface normal intersects the tool
position, the starting point of the first element is the
point of approach and departure. For contour milling and
finishing (pocket milling), define with the Approach
radius
whether the tool is to approach directly or in an
arc.
 G57/G58 oversizes are taken into account if the
Oversizes I, K
are not programmed:
 G57: Oversize in X and Z direction
 G58: The oversize "shifts" the milling contour as
follows:
– With inside milling and closed contour: The contour
is contracted
– With outside milling and closed contour: The
contour is expanded
– With open contour and Q=1: Left in machining
direction
– With open contour and Q=2: Right in machining
direction
Parameters