Siemens SINUMERIK 808D User Manual

Programming and Operating Manual (Milling)
162 6FC5398-4DP10-0BA6, 09/2017
Parameter
Data type
Description
DTS REAL Dwell time at starting point and for chip removal
Values:
>0: in seconds
<0: in revolutions
FRF
REAL
Feedrate factor for the first drilling depth (enter without sign) Range of values: 0.001 ... 1
VARI
INT
Machining type: Chip breakage=0, Chip removal=1
AXN
INT
Tool axis (values: 1 = 1st geometrical axis; 2 = 2nd geometrical axis; 3 = 3rd geometrical
axis)
MDEP
REAL
Minimum drilling depth (only in connection with degression factor)
VRT REAL Variable return path with chip breakage (VARI=0)
Values:
>0: if traction value
=0: retraction value 1mm set
DTD
REAL
Dwell time at final drilling depth
Values:
>0: in seconds
<0: in revolutions
=0: value same as DTB
DIS1 REAL Programmable limit distance for reinsertion in the drill hole (for chip removal VARI=1)
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)
● Approaching the position of safety distance relative to the reference plane with 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)
● Retracting to the reference plane brought forward by the safety clearance for swarf removal with G0
● Dwell time at the starting point (parameter DTS)
● Approach of the drilling depth last reached, reduced by anticipation distance with G0
● Traversing to the next drilling depth with G1 (sequence of motions is continued until the final drilling depth is reached)
● Retracting to the retraction plane with G0

Siemens SINUMERIK 808D Specifications

General

Brand	Siemens
Model	SINUMERIK 808D
Category	Control Unit
Language	English