Siemens SINUMERIK 840D SL Operating Manual page 305

Parameter Description
DF
Percentage for each additional infeed
•
DF=100: Infeed increment remains constant
DF<100: Amount of infeed is reduced in direction of final drilling depth Z1
Example: last infeed 4 mm; DF 80%
next infeed = 4 x 80% = 3.2 mm
next but one infeed = 3.2 x 80% = 2.56 mm etc.
Amount for each additional infeed
•
V1 Minimum infeed - (only for DF, percentage for each additional infeed)
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.
Predrilling Predrilling with reduced feedrate
Yes
•
No
•
The reduced drilling feedrate is obtained as follows:
Drilling feedrate F1 < 0.15 mm/rev: Predrilling feedrate = 30% of F1
Drilling feedrate F1 ≥ 0.15 mm/U: Predrilling feedrate = 0.1 mm/rev
AZ (only for G Predrilling depth with reduced drilling feedrate (inc) - ("yes", only for pre-drilling)
code)
Through boring Remaining drilling depth with drilling feedrate
Yes
•
No
•
ZR Residual drilling depth for through boring - ("yes", only for through boring)
FR Drilling feedrate for remaining drilling depth - ("yes", only for through boring)
Stock removal Stock removal before thread milling
• Yes
No
•
Return to workpiece surface for stock removal before thread milling.
Thread Direction of rotation of the thread
• Right-hand thread
Left-hand thread
•
F2 Feedrate for thread milling
Milling
Operating Manual, 02/2012, 6FC5398-7CP40-3BA0
Programming technological functions (cycles)
8.1 Drilling
Unit
%
mm
mm
mm
mm
mm/min
mm/rev
mm/min
mm/tooth
305