CNC Machinist Calculator UltraG93 Inverse time feed
Fanuc G-code · Mill
F is the inverse of the time in minutes for the move, so F equals 1 divided by minutes. Used for rotary axis and 4 or 5 axis moves where inches per minute is not meaningful.
Format
G93 G01 X A F
Addresses
| Address | What it does |
|---|---|
F | Inverse time, 1 divided by the move time in minutes |
How it works
Modal, group 05. Cancel with G94.
Example program
G93 (INVERSE TIME)
G01 X1. A90. F20. (MOVE TAKES 1 DIVIDED BY 20 MIN, 3 SECONDS)
G94 (BACK TO IPM)
G01 X1. A90. F20. (MOVE TAKES 1 DIVIDED BY 20 MIN, 3 SECONDS)
G94 (BACK TO IPM)
Example is in inch. Check offsets and clearances first.
Watch out for
- Every move block needs its own F. Missing F gives an alarm.
- Return to G94 before normal milling, or feeds are read wrong.
Related codes
G93 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Haas NGC | Inverse time feed mode |
| Fagor 8055 8065 | Polar origin preset |
| LinuxCNC Tormach | Inverse time feed |
| Mach3 Mach4 | Inverse time feed |
| Centroid CNC12 Acorn | Inverse time feed |
| Hurco WinMax (NC) | Inverse time feed |
| Fadal | Inverse time feed |
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