Siemens SINUMERIK 840D sl Operation/Programming Manual page 169

08/2005
5
Break
chips
-or-
Parameters
T, D, F, S, V See Sec. "Creating program blocks".
Shank The drill is inserted into the workpiece until the drill shank reaches the value
programmed for Z1. The insertion angle entered in the tool list is applied.
Tip The drill is inserted into the workpiece until the drill tip reaches the value
programmed for Z1.
Z0 Reference point (abs)
Z1 Insertion depth with reference to Z0 for drill tip or drill shank.
(abs or inc)
D Maximum infeed
DF Percentage for each additional infeed
DF = 100: Amount of infeed remains constant
DF < 100: Amount of infeed is reduced in direction of final drilling depth.
V1 Minimum infeed
Parameter V1 is available only if DF<100% has been programmed.
If the amount of infeed is very small a minimum infeed can be programmed with
parameter V1.
V1 < Amount of infeed: Infeed with infeed value.
V1 < Amount of infeed: Infeed with the value programmed in V1.
V2 Retraction amount (for chipbreaking only)
Amount by which the drill is retracted for chipbreaking.
DT Dwell time for release cut
XD Center offset in X direction
The center offset can be used for example to produce a drill hole with an exact fit. A
rotary drill (rotary drill type) or U drill (drill type) is required. A "normal" drill is not
suitable.
The maximum center offset is stored in a machine data code.
♥ Siemens AG, 2005. All rights reserved
SINUMERIK 840D sl Operation/Programming ShopTurn (BAT) – 08/2005 Edition
Press the "Drilling" and "Drilling centric" soft keys.
Drilling
centric >
Press the "Break chips" or "Solid machin." soft key.
Solid
machin.
Example: DF = 80
Last infeed was 4 mm;
4 x 80% = 3.2; next infeed increment is 3.2 mm
3.2 x 80% = 2.56; next infeed increment is 2.56 mm, etc.
Description
ShopTurn Functions
5
5.2 Drilling
Unit
mm
mm
mm
%
mm
mm
s
U
mm
5-169