Programming and Operating Manual (Milling)
6FC5398-4DP10-0BA6, 09/2017
157
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.
Drilling, centering - CYCLE81
Programming
CYCLE81 (RTP, RFP, SDIS, DP, DPR)
Retraction plane (absolute)
Reference plane (absolute)
SDIS REAL Safety clearance (enter without sign)
DP REAL Final drilling depth (absolute)
DPR REAL Final drilling depth relative to the reference plane (enter without sign)
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:
● 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
RFP 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.
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.
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