Siemens SINUMERIK 840D Programming Manual page 70

2
Drilling Cycles and Drilling Patterns
2.1 Drilling cycles
real
_DTD
real
_DIS1
Function
The tool drills at the programmed spindle speed and
feedrate to the programmed final drilling depth.
Deep hole drilling is performed with a depth infeed of a
maximum definable depth executed several times,
increasing gradually until the final drilling depth is
reached.
The drill can either be retracted to the reference plane +
safety distance after every infeed depth for swarf
removal or retracted in each case by 1mm for chip
breaking.
2-70
Dwell time at final drilling depth
Values: > 0 in seconds
< 0 in revolutions
= 0 value as for DTB
Programmable limit distance on re-insertion in hole (VARI=1 for swarf
removal)
Values: > 0 programmable value applies
= 0 automatic calculation
SINUMERIK 840D/840Di/810D Programming Guide Cycles (PGZ) – 11.02 Edition
2
03.96
04.00
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