Siemens SINUMERIK 840D Programming Manual page 76

Drilling Cycles and Drilling Patterns
2
2.1 Drilling cycles
The cycle implements the following motion
sequence:
• Approach of the reference plane brought forward by
the safety clearance with G0
• Traverse to final drilling depth with G1 and at the
feedrate programmed under parameter FFR
• Dwell time at final drilling depth
• Retraction to the reference plane brought forward by
the safety clearance with G1 and the retraction
feedrate defined under parameter RFF
• Retraction to retraction plane with G0
Description of parameters
See Section 2.1.2. (Drilling, Centering – CYCLE81)
for a description of parameters RTP, RFP, SDIS,
DP, DPR.
DTB (dwell time)
Parameter DTB is the dwell time at the final drilling
depth (chip breaking) in seconds.
FFR (feedrate)
The feedrate value assigned to FFR is active for
boring.
RFF (retraction feedrate)
The feedrate value assigned to RFF is active for
retraction from the plane.
2-76
Z
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide, Cycles (PGZ) - 04.00 Edition
03.96
2
G0
G1
G4
RTP
RFP+SDIS
RFP
X
DP=RFP-DPR
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