Siemens SINUMERIK 840D

Programming technological functions (cycles)
8.1 Drilling
Milling
Operating Manual, 03/2010, 6FC5398-7CP20-1BA0
279
Parameter Description Unit
V2 Retraction distance after each machining step – (only without compensating chuck,
chipbreaking and manual retraction)
Distance by which the drill is retracted for chipbreaking.
V2 = automatic: The tool is retracted by one revolution.
mm
DT (only for G
code)
Dwell time at final drilling depth in seconds s
SR (only for G
code)
Spindle speed for retraction - (only for when a compensating chuck is not used) rev/min
SDE (only for
G code)
Direction of rotation after end of cycle:



Technology
 Yes
– Exact stop
– Precontrol
– Acceleration
– Spindle
 No
Exact stop (only
for technology,
yes)
 Behavior the same as it was before the cycle was called
 G601: Block advance for exact stop fine
 G602: Block advance for exact stop coarse
 G603: Block advance if the setpoint has been reached
Precontrol (only
for technology,
yes)
 Behavior the same as it was before the cycle was called
 FFWON: with precontrol
 FFWOF: without precontrol
Acceleration (only
for technology,
yes)
 Behavior the same as it was before the cycle was called
 SOFT: Jerk-limited (soft) acceleration of the axes
 BRISK: Abrupt acceleration of the axes
 DRIVE: Reduced axis acceleration
Spindle (only for
technology, yes)
 Speed controlled: Spindle for MCAL; speed controlled operation
 Position controlled: Spindle for MCALL; position controlled operation