HEIDENHAIN CNC Pilot 4290 V7.1 - Manual (Page 214)

214
4.20 Cont
our
-Based T
u
rn
ing Cy
cles
The CNC PILOT uses the tool definition to distinguish between
external and internal machining.
Program at least NS or NS, NE and P.
B Slide lead with 4-axis machining
„ B=0: Both slides work at the same diameter—at double
feed rate
„ B<>0: Distance to the leading slide (the approach). The
slides work on different diameters with the same feed rate.
„ B<0: Slide with larger number leads
„ B>0: Slide with smaller number leads
„ 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
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 (first in Z direction, then in X).
3 Moves at feed rate to target point Z.
4 Depending on H:
„ H=0: Machines the contour outline
„ H=1 or 2: Retracts at 45°
5 Returns at rapid traverse and approach for next pass.
6 Repeats 3 to 5 until target point X has been reached.
7 If required, repeats 2 to 6 until all areas have been machined.
8 If H=1: Smooths the contour
9 Retracts as programmed in Q.
Parameters