Heidenhain MANUALplus 4110 User Manual Page 331

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HEIDENHAIN MANUALplus 4110 331
6.14 Recess-Turning Cycles
6.14 Recess-Turning Cycles
Function of recess turning cycles
The defined contour area is machined by alternate recessing and
roughing movements. The machining process requires a minimum of
retraction and infeed movements.
The contour to be machined may contain various valleys. If required,
the area to be machined is divided into several sections.
To influence recess-turning operations, use the following parameters:
Recessing feed O: Feed rate for recessing - If "O" is not defined, the
"active feed rate" for turning and recessing operations is effective.
Turning operation, unidirectional/bidirectional U: You can
perform a unidirectional or bidirectional turning operation. With
radial recess-turning cycles, unidirectional turning operations are
always performed in the direction of the spindle. With axial recess-
turning cycles, the machining direction corresponds to the direction
of contour definition.
Offset width B: After the second infeed movement, during the
transition from turning to recessing, the path to be machined is
reduced by "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.
Depth compensation R (only with G815/G825): 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 "R" during finish-machining. The depth
compensation factor is usually determined empirically.
Roughing/finishing Q: Define whether the contour area is to be
rough-machined and/or finish-machined. "Q" can be programmed
such that the workpiece is rough-machined in the first cycle; then
insert another tool and finish-machine the workpiece, using a further
cycle.
These cycles require the use of recess-turning tools.
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