Siemens SINUMERIK 840D Programming Manual page 59

03.96
04.00
2
Sequence of operations
Position reached prior to cycle start:
The drilling position is the position in the two axes of
the selected plane.
The cycle implements the following motion
sequence:
Deep hole drilling with swarf removal (VARI=1):
• Approach of the reference plane brought forward
by the safety clearance with G0
• Traverse to the first drilling depth with G1, the
feedrate for which is derived from the feedrate
defined with the program call which is subject to
parameter FRF (feedrate factor)
• Dwell time at final drilling depth (parameter DTB)
• Retraction to the reference plane brought forward
by the safety clearance with G0 for swarf removal
• Dwell time at starting point (parameter DTS)
• Approach last drilling depth reached, reduced by
the calculated (by cycle) or programmable limit
distance with G0
• Traverse to next drilling depth with G1 (sequence
of motions is continued until the final drilling
depth is reached)
• Retraction to retraction plane with G0
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SINUMERIK 840D/840Di/810D/FM-NC Programming Guide, Cycles (PGZ) - 04.00 Edition
Drilling Cycles and Drilling Patterns
2.1 Drilling cycles
Z
Z
X
2
X
G1
G0
G4
RTP
RFP+SDIS
RFP
FDEP
FDEP
DP = RFP-DPR
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