Siemens SINUMERIK 808D ADVANCED Programming And Operating Manual page 152

Function
The tool drills at the programmed spindle speed and feedrate to the entered final drilling depth. When the final drilling depth
is reached, the programmed dwell time is active.
Sequence
Position reached prior to cycle start:
The drilling position is the position in the two axes of the selected plane.
The cycle creates the following sequence of motions:
● Approach of the reference plane brought forward by the safety clearance by using G0
● Traversing to final drilling depth with G1 and the feedrate programmed prior to the cycle call
● Dwell time to final drilling depth
● Retraction up to the reference plane brought forward by the safety clearance using G1 and the same feedrate value
● Retraction to the retraction plane with G0
Explanation of the parameters
For the parameters RTP, RFP, SDIS, DP, DPR, refer to Section "Drilling, centering - CYCLE81 (Page 126)".
DTB (dwell time)
The dwell time to the final drilling depth (chip breakage) is programmed under DTB in seconds.
Programming and Operating Manual (Milling)
152
6FC5398-4DP10-0BA1, 01/2014