HEIDENHAIN MANUALplus 4110 - Manual (Page 143)

HEIDENHAIN MANUALplus 4110 143
4.5 Recessing c
y
cles
Recess turning
The workpiece is machined by alternate recessing and roughing
movements. The machining process requires a minimum of retraction
and infeed movements.
To influence recess-turning operations, use the following parameters:
„ Recessing feed rate O: Feed rate for recessing movement.
„ 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 ICP 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 "offset width B." Each time the system switches from
turning to recessing 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 RB: Depending on factors such as workpiece
material or feed rate, the tool tip is displaced during a turning
operation. The resulting infeed error can be compensated with
"depth compensation RB" during finishing. The depth compensation
factor is usually determined empirically.
These cycles require the use of recess-turning tools.