HEIDENHAIN iTNC 530 (340 49x-04) - Manual (Page 448)

448 8 Programming: Cycles
8.8 SL c
y
cles
Characteristics of the fixed cycles
„ The TNC automatically positions the tool to the set-up clearance
before a cycle.
„ Each level of infeed depth is milled without interruptions since the
cutter traverses around islands instead of over them.
„ In order to avoid leaving dwell marks, the TNC inserts a globally
definable rounding radius at non-tangential inside corners. The
rounding radius, which is entered in Cycle 20, affects the tool center
point path, meaning that it would increase a rounding defined by the
tool radius (applies to rough-out and side finishing).
„ The contour is approached on a tangential arc for side finishing.
„ For floor finishing, the tool again approaches the workpiece on a
tangential arc (for tool axis Z, for example, the arc may be in the Z/X
plane).
„ The contour is machined throughout in either climb or up-cut milling.
The machining data (such as milling depth, finishing allowance and
set-up clearance) are entered as CONTOUR DATA in Cycle 20.
With MP7420 you can determine where the tool is
positioned at the end of Cycles 21 to 24.