Selca G78 Circular pocket milling (roughing cycle) / Last point of a polygonal pocket

G78 Last point of polygonal pocket

Selca G78 Last point of a polygonal pocket without finish pass

Programming

G78 X... Y...

G78 Circular pocket milling

Selca G78 Circular pocket milling (roughing cycle)

Programming

G78 X... Y... K... [Q...] [I...] [J...] [D0=...][D1=...] [D2=...] [D3=...] [D4=...] [D6=...] [D7=...] [D9=...] [D10=...] [D11=...] [D12=...]

Parameters

ParameterDescription
X,Ypocket center coordinates.
Kpocket diameter (negative = clockwise cutting).
Qinternal diameter.
Istock allowance (default value I=0).
Jdistance between passes in tool radius units (default value J=1.6).
D0machining mode selection:
D0=0 concentric cuts from the center toward the border and Z – increment.
D0=1 spiral path cuts from the center toward the border and Z – increment.
D0=-1 spiral path cuts from the border toward the center and Z – increment.
D0=2 spiral path cuts from the center toward the border and X,Y, Z – increment.
D0=3 spiral on plane from center to outside, Z spiral increments.
D0=-3 spiral on plane from outside to center, Z spiral increments.
D1=pocket starting depth.
D2=pass depth.
D3=pocket bottom depth.
D4=clearance distance (default value D4=2 mm).
D6=wall taper rate (default value D6=0- vertical wall).
D7=percentage of feed rate variation during depth increment (default value D7=1).
D9=clearance value from pocket walls during tool repositioning at end of cycle (D9=0.5mm by default).
D10repositioned in starting point (for D0=3 and D0=-3 only):
D10=0 rapid return (default).
D10=1 return to programmed F following a semicircular path.
D11depth increment type (for D0=3 and D0=-3 only):
D11=0 (D12)= spiral path angle on Z to reach D2 (default).
D11=1 (D12)= rotation increment to reach D2.
D11=2 (D12)= number of rotations to achieve D2.
D12=D11 value (for D0=3 and D0=-3 only): (default D12=3).