Description Of Parameters; Further Notes - Siemens SINUMERIK 840D Programming Manual

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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 clearance)
The safety clearance (SDIS) is effective with regard
to the reference plane which 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 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 2000 All rights reserved.
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide, Cycles (PGZ) - 04.00 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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