Operation Manual

HEIDENHAIN CNC PILOT 4290 521
6.14 Interactive Working Plan Generation (IWG)
Finishing
The IWG presents the following finishing operations for selection
(“Finishing” drop-down menu):
 Finishing using cycle G890:
 Contour machining
 Residual-contour machining
 Finishing hollowing (neutral tool)
 Finishing using special functions:
 Clearance turning: see “Finishing – Clearance turning” on
page 524
 Undercuts: see “Finishing – undercut” on page 524
Soft keys
Longitudinal/constant oversize
“Approach” soft keys
Automatic selection of the mode of
approach
First X, then Z direction
First Z, then X direction
“Retract” soft keys
Diagonally to retraction position
First X, then Z direction
First Z, then X direction
Retract to safety clearance
Parameters
X Cutting limit
Z Cutting limit
L Depending on the soft-key setting:
 Longitudinal oversize
 Constant oversize (generates “Oversize G58” before the
cycle)
P Transverse oversize
Plunge-cutting (machine descending contours)?
 Yes
 No
E Reduced plunging feed rate with descending contours
Approach
 Yes: “Mode of approach Q” (define by soft key)
 No (Q=3): Tool is located near the starting point of the
contour area
Q Type of approach (see soft key table)
 Q=0: The IWG checks the following types of approach:
 Diagonal approach
 First X, then Z direction
 Equidistant around the barrier
 Omission of the first contour element if the starting
position is inaccessible
 Q=1: First X, then Z direction
 Q=2: First Z, then X direction
Retract
 Yes: “Type of retraction H” (define by soft key)
 No (H=4): Tool remains on the end coordinate