Contents
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
| Parameter | Description |
|---|---|
| X,Y | pocket center coordinates. |
| K | pocket diameter (negative = clockwise cutting). |
| Q | internal diameter. |
| I | stock allowance (default value I=0). |
| J | distance between passes in tool radius units (default value J=1.6). |
| D0 | machining 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). |
| D10 | repositioned 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. |
| D11 | depth 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). |
