Operation Manual

HEIDENHAIN CNC PILOT 4290 223
4.20 Contour-Based Turning Cycles
Program at least NS or NS, NE.
Number of cutting passes:
Maximum offset = SBF * cutting width
(SBF: See Machining Parameter 6)
 The tool radius compensation: is active.
 A G57 oversize enlarges the contour (also inside
contours).
 A G58 oversize
 >0: Enlarges the contour
 <0: Is not offset
 G57/G58 oversizes are deleted after cycle end.
Cycle run (where Q=0 or 1)
1 Calculates the areas to be machined and the cutting
segmentation.
2 Approaches workpiece for first pass from starting point, taking
the safety clearance into account.
 Radial recess: First Z, then X direction
 Axial recess: First X, then Z direction
3 Executes first cut (roughing).
4 Returns at rapid traverse and approaches for next pass.
5 Repeats 3 to 4 until the complete area has been machined.
6 If required, repeats 2 to 5 until all areas have been machined.
7 If Q=0: Finish-machines the contour.