HEIDENHAIN MANUALplus 620 259
4.17 Contour-Based Turning Cycles
The MANUALplus uses the tool definition to distinguish between
radial and axial recesses.
Program at least one contour reference (e.g.: NS or NS, NE) and P.
Turning depth compensation R: Depending on factors such as
workpiece material or feed rate, the tool tip is displaced during a
turning operation. You can correct the resulting infeed error with the
turning depth compensation factor. The value is usually determined
empirically.
Offset width B: After the second infeed movement, during the
transition from turning to recessing, the path to be machined is
reduced by the offset width B. Each time the system switches on this
side, the path is reduced by B—in addition to the previous offset. The
total offset is limited to 80% of the effective cutting width (effective
cutting width = cutting width –2*cutting radius). If required, the
MANUALplus reduces the programmed offset width. After precutting,
the remaining material is removed with a single cut.
Parameters
H Type of retraction at cycle end (default: 0)
0: Return to starting point (axial recess: first direction Z,
then X; radial recess: first X direction, then Z)
1: Positions in front of the finished contour
2: Retracts to safety clearance and stops
V Identifier start/end (default: 0) A chamfer/rounding arc is
machined:
0: At start and end
1: At the start
2: At the end
3: No machining
O Recessing feed rate (default: active feed rate)
E Finishing feed rate (default: active feed rate)
B Offset width (default: 0)
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.
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