Siemens SINUMERIK 840D Operation/Programming Manual page 244

3
Programming with ShopMill
3.7 Drilling
Pre-drilling When drilling, start initially with a reduced feedrate.
The reduced drilling feedrate results as follows:
Drilling feedrate F1 < 0.15mm/rev: Pre-drilling feedrate = 30% of F1
Pre-drilling feedrate F1 ≥ 0.15mm/rev: Pre-drilling feedrate = 0.1mm/rev
Through-drilling When drilling the residual drilling depth ZR drill with feedrate FR.
ZR Residual drilling depth (for through-drilling only)
FR Feedrate through-drilling (for through-drilling only)
Stock removal Return to workpiece surface for stock removal before thread milling.
Thread Right-hand thread
Left-hand thread
F2 Milling feed
P Pitch
For a thread pitch entered in turns/'', enter the integer in front of the decimal point in
the first parameter field and the figures after the decimal point as a fraction in the
second and third fields.
For example, 13.5 turns/" is entered as follows:
Z2 Retraction before thread milling
Z2 is for defining the thread depth in the direction of the tool axis. Z2 is relative to the
tool tip.
∅
Nominal thread diameter
Machining Climb milling: Mill thread in one cycle.
direction Conventional milling: Mill thread in one cycle.
Conventional milling + climb milling: Mill thread in two cycles: rough cutting is
performed by conventional milling with defined allowances, then finish cutting is
performed by climb milling with milling feedrate FS.
FS Milling feed finish cutting (for conventional milling + climb milling only)
3-244
SINUMERIK 840D/840Di/810D Operation/Programming ShopMill (BAS) – 10.04 Edition
3
10.04
mm
mm/min
mm/rev
mm/min
mm/tooth
in/rev
Turns / "
mm
mm
mm/min
mm/tooth
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