HEIDENHAIN CNC Pilot 4290 V7.1 - Manual (Page 517)

HEIDENHAIN CNC PILOT 4290 517
6.14 Int
e
ra
ctiv
e W
o
rk
ing Plan Gener
a
tion (IWG)
Centric predrilling (G74)
The IWG generates the cycle G74 for the selected contour area
(predrilling at turning center using stationary tools).
Select the machining range: Select all contour elements
encompassing the bore hole. If required, the bore hole can be limited
with “drilling limitation Z.”
Parameters
Z Drilling limitation
S Safety clearance (generates “Safety clearance G47” before the
cycle)
P 1st hole depth
J Minimum hole depth
I Reduction value
B Retraction distance (default: Retract to starting point of hole)
E Dwell time (for chip breaking at end of hole)
Position the drill with “Cycle > Approach” to the turning
center.