Siemens SINUMERIK 840D sl Operating Manual page 283

Parameter Description
D - (only for G 1. Drilling depth (abs) or 1st drilling depth in relation to Z0 (inc)
code)
D - (only for Maximum depth infeed
ShopMill)
FD1 Percentage for the feedrate for the first infeed
DF Infeed:
Amount for each additional infeed
•
Percentage for each additional infeed
•
DF = 100%: Infeed increment remains constant
DF < 100%: Infeed increment is reduced in direction of final drilling depth.
Example: Last infeed was 4 mm; DF is 80%
next infeed = 4 x 80% = 3.2 mm
next infeed = 3.2 x 80% = 2.56 mm etc.
V1 Minimum infeed - (only for DF in %)
Parameter V1 is only provided if DF<100 has been programmed.
If the infeed increment becomes very small, a minimum infeed can be programmed in
parameter "V1".
V1 < Infeed increment: The tool is inserted by the infeed increment
V1 > Infeed increment: The tool is inserted by the infeed value programmed under V1.
V2 Retraction distance after each machining step – (for chipbreaking only)
Distance by which the drill is retracted for chipbreaking.
V2 = 0: The tool is not retracted but is left in place for one revolution.
Clearance
Manual
•
distance
The clearance distance must be entered manually.
(for stock removal
Automatic
•
only)
The clearance distance is calculated by the cycle.
DTB - (only for G
Dwell time at drilling depth in seconds
•
code)
Dwell time at drilling depth in revolutions
•
DT
Dwell time at final drilling depth in seconds
•
Dwell time at final drilling depth in revolutions
•
DTS - (only for G
Dwell time for stock removal in seconds
•
code)
Dwell time for stock removal in revolutions
•
Milling
Operating Manual, 09/2011, 6FC5398-7CP40-2BA0
Programming technological functions (cycles)
8.1 Drilling
Unit
mm
mm
%
mm
%
mm
mm
s
rev
s
rev
s
rev
283