Drilling, Centering - Cycle81 - Siemens SINUMERIK 808D User Manual

D w ell time programming
The parameters for dwell times in the drilling cycles are always assigned to the F word and must therefore be assigned with
values in seconds. Any deviations from this procedure must be expressly stated.
12.4.3

Drilling, centering - CYCLE81

Programming
CYCLE81 (RTP, RFP, SDIS, DP, DPR)
Pa rameters
Pa rameter D a ta type
RTP REAL
RFP REAL
SDIS REAL
DP REAL
DPR REAL
Fu n ction
The tool drills at the programmed spindle speed and feedrate to the entered final drilling depth.
Se quence
Po sition reached prior to cycle start:
The drilling position is the position in the two axes of the selected plane.
Th e cycle creates the following sequence of motions:
● Approaching the position of safety distance relative to the reference plane with G0
● Traversing to the final drilling depth with the feedrate (G1) programmed prior to the cycle call
● Retracting to the retraction plane with G0
Explanation of the parameters
R FP and RTP (reference plane and retraction plane)
Normally, reference plane (RFP) and retraction plane (RTP) have different values. The cycle assumes that the retraction
plane precedes the reference plane. This means that the distance from the retraction plane to the final drilling depth is larger
than the distance from the reference plane to the final drilling depth.
SD IS (safety clearance)
The safety clearance (SDIS) acts with reference to the reference plane. This is brought forward by the safety clearance.
The direction in which the safety clearance is active is automatically determined by the cycle.
D P and DPR (final drilling depth)
The final drilling depth can be specified either absolute (DP) or relative (DPR) to the reference plane.
With relative specification, the cycle will calculate the resulting depth automatically using the positions of reference and
retraction planes.
Programming and Operating Manual (Milling)
6FC5398-4DP10-0BA6, 09/2017
D e scription
Retraction plane (absolute)
Reference plane (absolute)
Safety clearance (enter without sign)
Final drilling depth (absolute)
Final drilling depth relative to the reference plane (enter without sign)
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