Siemens SINUMERIK 840D Programming Manual page 71

2
03.96
04.00
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 distance 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 distance 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
© 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
Z
X
2
X
G1
G0
G4
RTP
RFP+SDIS
RFP
FDEP
FDEP
DP = RFP-DPR
2-71