HEIDENHAIN SW 68894x-03 - Manual (Page 305)

HEIDENHAIN CNC PILOT 640 305
4.7 Dr
illing cy
cles
Operating mode for technology database access depends on the tool
type:
 Twist drill: Drilling
 Indexable insert drill: Predrilling
BP Break duration: Time span for interruption of the feed. The
chip is broken by the (intermittent) interruption of the feed.
BF Break duration: Time interval until the next break. The chip
is broken by the (intermittent) interruption of the feed.
MT M after T: M function that is executed after the tool call T.
MFS M at beginning: M function that is executed at the
beginning of the machining step.
MFE M at end: M function that is executed at the end of the
machining step.
WP Displays which workpiece spindle is used to process the
cycle (machine-dependent)
 Main drive
 Opposing spindle for rear-face machining
 If "AB" and "V" are programmed, the feed rate is reduced
by 50 % during both pre-drilling and through-boring.
 The CNC PILOT uses the tool parameter driven tool to
determine whether the programmed spindle speed and
feed rate apply to the spindle or the driven tool.