Operation Manual

HEIDENHAIN CNC PILOT 4290 501
6.14 Interactive Working Plan Generation (IWG)
Roughing transverse (G820)
The IWG generates the cycle G820 for the selected contour area.
“Roughing” soft keys
Longitudinal/constant oversize
FD relief turn machining
E and F undercut machining
G undercut machining
H, K and U undercut machining
Parameters
P Cutting depth (maximum infeed)
A Approach angle – reference: Z axis (default 90°/270°)
W Departure angle – reference: Z axis (default 0°/180°)
X Cutting limit
Z Cutting limit
I Depending on the soft-key setting:
 Longitudinal oversize
 Constant oversize (generates “Oversize G58” before the
cycle)
K Transverse oversize
Plunge-cutting (machine descending contours)?
 Yes
 No
E Reduced plunging feed rate with descending contours
H Type of departure (type of contour smoothing)
 H=0: Machines contour outline after each pass
 H=1: Retracts at 45°; contour smoothing after last pass
 H=2: Retracts at 45° – no contour smoothing
Q Type of retraction at end of cycle
 Q=0: Return to starting point (first X, then Z direction)
 Q=1: Positions in front of the finished contour
 Q=2: Retracts to safety clearance and stops
Undercut machining. The setting is made by soft key.