Drilling, Centering - Cycle81 - Siemens SINUMERIK 808D ADVANCED Programming And Operating Manual

9.4.3

Drilling, centering - CYCLE81

Programming
CYCLE81 (RTP, RFP, SDIS, DP, DPR)
Parameters
Parameter Data type
RTP REAL
RFP REAL
SDIS REAL
DP REAL
DPR REAL
Function
The tool drills at the programmed spindle speed and feedrate to the entered final drilling depth.
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 the final drilling depth at the feedrate programmed in the calling program (G1)
● Retraction to the retraction plane with G0
Explanation of the parameters
RFP and RTP (reference plane and retraction plane)
Normally, reference plane (RFP) and return 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.
SDIS (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.
DP 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 (Turning)
6FC5398-5DP10-0BA2, 06/2015
Description
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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