Siemens SINUMERIK 840D Programming Manual page 65

2
03.96
Description of parameters
RFP and RTP (reference plane and retraction plane)
Generally, the reference plane (RFP) and the
retraction plane (RTP) have different values. In the
cycle it is assumed that the retraction plane lies in
front of the reference plane. The distance between
the retraction plane and the final drilling depth is
therefore greater than the distance between the
reference plane and the final drilling depth.
SDIS (Safety distance)
The safety distance (SDIS) is effective with regard to
the reference plane which is brought forward by the
safety distance.
The direction in which the safety distance is active
is automatically determined by the cycle.
DP and DPR (final drilling depth)
The final drilling depth can be defined as either
absolute (DP) or relative (DPR) to the reference
plane.
If it is entered as a relative value, the cycle
automatically calculates the correct depth on the
basis of the positions of the reference and retraction
planes.
Further notes
If a value is entered both for the DP and the DPR,
the final drilling depth is derived from the DPR. If the
DPR deviates from the absolute depth programmed
via the DP, the message "Depth: Corresponds to
value for relative depth" is output in the dialog line.
© Siemens AG, 2002. All rights reserved
SINUMERIK 840D/840Di/810D Programming Guide Cycles (PGZ) – 11.02 Edition
Drilling Cycles and Drilling Patterns
2.1 Drilling cycles
Z
X
2
G1
G0
RTP
RFP+SDIS
RFP
DP=RFP-DPR
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