HEIDENHAIN CNC PILOT 640 User Manual page 322

4
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 X direction, then in Z)
3 Moves at feed rate to Cutting limit in X
4 Depending on H:
H = 0: Machines the contour outline
H = 1 or 2: Retracts at 45°
5 Returns at rapid traverse and approaches for next pass
6 Repeats 3 to 5 until Cutting limit in Z 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
Application as 4-axis cycle
Same diameter:
Both slides start simultaneously
Differing diameters:
When the leading slide has reached Slide mov.diff. B, the
second slide starts. This synchronization takes place with every
cut
Each slide advances by the calculated depth of cut
If the number of cuts is uneven, the leading slide performs the
last cut
If you are machining at a constant cutting speed, the cutting
speed of the leading slide is used. The leading tool does not
retract until the subsequent tool is ready for use
If you use 4-axis cycles, ensure that you use identical
tools (e.g. tool type, cutting radius)
Undercuts are not machined in 4-axis cycles. Parameter
O is hidden
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DIN/ISO programming | Contour-based turning cycles
HEIDENHAIN | User's Manual smart.Turn and DIN Programming | 12/2017