Operation Manual

HEIDENHAIN CNC PILOT 4290 517
6.14 Interactive Working Plan Generation (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.