HEIDENHAIN CNC Pilot 4290 - Manual (Page 305)

HEIDENHAIN CNC PILOT 4290 293
Roughing hollowing – neutral tool (G835)
Parameters
P:
Cutting depth (maximum infeed)
A: Approach angle (reference: Z axis) – default 0°/180° (parallel
to Z axis)
W: Departing angle (reference: Z-axis) – default 90°/270°
(perpendicular to Z-axis)
X, Z: Cutting limit
Type of oversize is set by soft key
I, K: Different longitudinal/transverse oversize
I: Constant oversize – generates ”oversize G58” before the
cycle
Plunging: Machine descending contours ?
■ Yes
■ No
E: Reduced plunging feed rate with descending contours
Bidirectional: Cutting with cycle
■ Yes: G835
■ No: G830
Q: Retraction at cycle end
■ Q=0: Return to starting point
Longitudinal: first X, then Z direction
Transverse: First Z, then X direction
■ Q=1: Positions in front of the finished contour
■ Q=2: Lifts off to safety clearance and stops
Undercutting (see soft-key table)
Hollowing – Automatic
supports bilateral machining. TURN PLUS first selects a roughing
tool for rough-machining and then a tool for removing the residual
material in the opposite machining direction.
You can use the ”Hollowing automatic” function only for
recesses (a relief turn can be machined using a standard
roughing cycle).TURN PLUS uses the ”Permissible inward
copying angle EKW” (machining parameter 1) to distinguish
recesses from relief turns.
6.12 Int
er
activ
e
W
o
rking Plan Gener
ation (IWG)