HEIDENHAIN CNC Pilot 4290 - Manual (Page 319)

HEIDENHAIN CNC PILOT 4290 307
6.12.9 Milling
Overview of milling operations
■ Contour milling – roughing, finishing (G840)
■ Area milling – roughing (G845), finishing (G846)
■ Deburring (G840)
■ Engraving (G840)
■ Automatic milling – roughing, finishing
Continued
6.12 Int
er
activ
e
W
o
rking Plan Gener
ation (IWG)
Contour milling – roughing/finishing, deburring
(G840)
Contour milling and deburring are for figure or ”free contours” (open or
closed) of the reference planes:
■ FRONT
■ REAR SIDE
■ SURFACE
The oversize L ”shifts” the milling contour in the direction defined
under ”milling location Q”:
■ Q=0: Oversize is ignored
■ Q=1 (closed contour): Reduces the size of the contour
■ Q=2 (closed contour): Enlarges the contour
■ Q=3 (open contour): Shift left/right – depending on the machining
direction
Parameters
K:
Retraction plane – default: return to starting position
■ Front/rear face: Retraction position in Z direction
■ Lateral surface: Retraction position in X direction (diameter)
Q: Milling location
■ Q=0 Contour: Cutter center on the contour
■ Q=1 inside (milling) – closed contour
■ Q=2 Outside (milling) – closed contour
■ Q=3 left/right of the contour (reference: machining
direction) – open contour
H: Cutting direction
■ H=0: Up-cut milling
■ H=1: Climb milling
R: Approach radius
■ R=0: Directly approach contour element
■ R>0: Approaching/departing radius connecting tangentially
with the contour element
■ R<0 with inside corners: Approach/departure radius
connecting tangentially with the contour element
■ R<0 with outside contours: Contour element is
approached/departed tangentially on a line