Siemens sinumerik 808d Programming And Operating Manual page 119

Parameter
DTD
DIS1
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
● Dwell time at final drilling depth (parameter DTB)
● Retraction to the reference plane brought forward by the safety clearance for swarf
● 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
● Retraction to the retraction plane with G0
Turning Part 2: Programming (Siemens instructions)
Programming and Operating Manual, 05/2012, 6FC5398-5DP10-0BA0
Data type
REAL
REAL
feedrate defined with the program call which is subject to parameter FRF (feedrate factor)
removal by using G0
final drilling depth is reached)
Description
Dwell time at final drilling depth
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)
Values: >0: programmable value applies
=0: automatic calculation
Cycles
2.4 Drilling cycles
119