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G64 Continuous path mode
Siemens 840D 828D G-code · Mill and lathe
The control blends from one block to the next without stopping at block ends. Corners get slightly rounded at high feed. Best for smooth contours and 3D surfaces.
Format
G64
How it works
Modal, G group 10 (exact stop or continuous path).
Example program
G64 ; CONTINUOUS PATH
G1 X50 Y0 F1500
X50 Y30 ; CORNER BLENDED
X0 Y30
G1 X50 Y0 F1500
X50 Y30 ; CORNER BLENDED
X0 Y30
Example is in inch. Check offsets and clearances first.
Watch out for
- G64 rounds sharp corners slightly. Use G60 or G9 where a sharp corner matters.
- G641 with ADIS= sets the rounding distance. G642 rounds inside axis tolerances from machine data.
Related codes
G64 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Cutting mode |
| Haas NGC | Exact stop cancel |
| Okuma OSP | Cutting mode |
| Mitsubishi M70 M80 | Cutting mode |
| Brother Speedio | Cutting mode |
| LinuxCNC Tormach | Path blending |
| Mach3 Mach4 | Constant velocity mode |
| Centroid CNC12 Acorn | Smoothing mode or cancel exact stop |
| Hurco WinMax (NC) | Cancel precision cornering |
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