HEIDENHAIN TNC 620 (340 56x-02) Cycle programming - Manual (Page 169)

HEIDENHAIN TNC 620 169
7.
1 SL Cy
cles
Characteristics of the fixed cycles
„ The TNC automatically positions the tool to the setup clearance
before a cycle.
„ Each level of infeed depth is milled without interruptions since the
cutter traverses around islands instead of over them.
„ The radius of “inside corners” can be programmed—the tool keeps
moving to prevent surface blemishes at inside corners (this applies
for the outermost pass in the Rough-out and Side Finishing cycles).
„ 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
setup clearance) are entered as CONTOUR DATA in Cycle 20.