Siemens SINUMERIK 808D Programming And Operating Manual page 45

Drilling
The machining sequence is as follows:
1. Starting from the current axis position, the tool is traversed to the cycle start point in the
2. The transverse axis is positioned to the center of rotation.
3. The first infeed in the axial axis (as defined in the "Infeed Max." parameter) is then
4. The subsequent traversing movement in the axial axis depends on whether "chip
5. The subsequent infeeds in the longitudinal axis are always calculated in the same way:
6. Infeed motion and "chip breaking/deswarfing" then alternate until the drilling depth
7. Once the required drilling depth is reached, the waiting time specified in the "Dwell t"
8. At the end of this waiting time, the tool is traversed to the cycle start point in the
See also
Principle operating sequence (Page 38)
General parameters (Page 41)
Manual Machine Plus (Turning)
Programming and Operating Manual, 12/2012, 6FC5398-3DP10-0BA0
longitudinal axis. This is calculated internally from the value for the "Reference z0"
parameter (taking into account the clearance distance).
performed.
breaking" or "deswarfing" has been selected. With "chip breaking", the tool is retracted in
the longitudinal axis by the value set in the "return travel" parameter; with "deswarfing",
the longitudinal axis is positioned at the cycle start point.
new infeed value = last infeed value x factor + return travel value The new infeed value is
monitored to ensure that it complies with the value for the "Infeed Min." parameter. If the
infeed value is below the minimum infeed, this value is imposed, provided that the drilling
depth allows it. The calculation is followed by the infeed in the longitudinal axis.
specified in the "Length I" parameter is reached.
parameter begins.
longitudinal axis.
3.4 Manual machining using cycles (functions)
Manual machining
45