HEIDENHAIN TNC 620 (340 56x-03) - Manual (Page 533)

HEIDENHAIN TNC 620 533
SLII Cycles 20 to 24:
„ Number of definable contour
elements „ Max. 16384 blocks in up to 12
subcontours „ Max. 8192 contour elements in up to
12 subcontours, no restrictions for
subcontour
„ Define the working plane „ Tool axis in TOOL CALL block defines
the working plane „ The axes of the first positioning block
in the first subcontour define the
working plane
„ Traverse paths during rough-out „ Islands are not circumnavigated.
Reciprocating plunge infeed at
reduced feed rate (increase in
machining time) „ Islands are circumnavigated at the
current machining depth
„ Contour-parallel rough-out, or paraxial
channel milling and rough-out „ Rough-out is always contour-parallel „ Configurable via MP7420
„ Internal consideration of combined
contours „ Combinations always refer to the
defined uncompensated contour „ With MP7420, you can define
whether the uncompensated or
compensated contour is to be
combined
„ Rough-out strategy if multiple pockets
are defined „ At first, all pockets are roughed-out on
the same plane „ With MP7420, you can define
whether individual pockets are
roughed-out completely or on the
same plane
„ Position at end of SL cycle „ End position = clearance height above
the last position that is defined before
the cycle call „ With MP7420, you can define
whether the end position is above the
last programmed position, or whether
the tool moves only to clearance
height
„ Tangential arcs for floor finishing
Cycle 23 „ 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 „ 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
„ Tangential arcs for side finishing
Cycle 24 „ 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. 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 620 iTNC 530