Cycles
2.4 Drilling cycles
Turning Part 2: Programming (Siemens instructions)
Programming and Operating Manual, 05/2012, 6FC5398-5DP10-0BA0
119
Parameter Data type Description
Dwell time at final drilling depth
DTD REAL
Values: >0: in seconds
<0: in revolutions
=0: value same as DTB
Programmable limit distance for reinsertion in the drill hole (for
chip removal VARI=1)
DIS1 REAL
Values: >0: programmable value applies
=0: automatic calculation
Function
The tool drills at the programmed spindle speed and feedrate to the entered 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 clearance after every infeed
depth for swarf removal or retracted in each case by 1 mm for chip breaking.
Sequence
Position reached prior to cycle start:
The drilling position is the position in the two axes of the selected plane.
The cycle creates the following sequence:
Deep-hole drilling with chip removal (VARI=1):
● Approach of the reference plane brought forward by the safety clearance by using G0
● Traversing 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 for swarf
removal by using G0
● Dwell time at the starting point (parameter DTS)
● Approach of the drilling depth last reached, reduced by anticipation distance by using G0
● Traversing to the next drilling depth with G1 (sequence of motions is continued until the
final drilling depth is reached)
● Retraction to the retraction plane with G0
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