HEIDENHAIN TNC 320 (340 55x-04) ISO programming - Manual (Page 452)

452
SLII Cycles 20 to 24:
„ Number of definable contour
elements
„ Define the working plane
„ Traverse paths during rough-out
„ Contour-parallel rough-out, or paraxial
channel milling and rough-out
„ Internal consideration of combined
contours
„ Rough-out strategy if multiple
pockets are defined
„ Position at end of SL cycle
„ Tangential arcs for floor finishing
Cycle 23
„ Tangential arcs for side finishing
Cycle 24
„ Max. 16384 blocks in up to 12
subcontours
„ Tool axis in TOOL CALL block defines
the working plane
„ Islands are not circumnavigated.
Reciprocating plunge infeed at
reduced feed rate (increase in
machining time)
„ Rough-out is always contour-parallel
„ Combinations always refer to the
defined uncompensated contour
„ At first, all pockets are roughed-out
on the same plane
„ End position = clearance height
above the last position that is defined
before the cycle call
„ Curvature of tangential arcs is
derived from the curvature of the
target contour. To position the
circular arc, the target contour is
systematically searched from end to
beginning until a position is found
where no collision can occur. If this is
not possible, the arc length is halved
until it can be positioned.
„ The max. width of the arc is three
tool radii, the max. angular length is
0.8 rad. To position the circular arc,
the target contour is systematically
searched from end to beginning until
a position is found where no collision
can occur. If this is not possible, the
arc length is halved until it can be
positioned.
„ Max. 8192 contour elements in up to
12 subcontours, no restrictions for
subcontour
„ The axes of the first positioning block
in the first subcontour define the
working plane
„ Islands are circumnavigated at the
current machining depth
„ Configurable via MP7420
„ With MP7420, you can define
whether the uncompensated or
compensated contour is to be
combined
„ With MP7420, you can define
whether individual pockets are
roughed-out completely or on the
same plane
„ With MP7420, you can define
whether the end position is above
the last programmed position, or
whether the tool moves only to
clearance height
„ Circular arcs are generated between
the starting point of the outermost
path of the roughing tool and the
center of the first contour element of
the path of the finishing tool
„ Max. width of the arc (tool moves
backward on tangential arc from
starting point of the path to shortly
before next edge contour), max. arc
height: finishing allowance + safety
clearance
Function TNC 320 iTNC 530