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G93 Inverse time feed mode
Haas NGC G-code · Mill
F becomes the inverse of the time for each move, 1 divided by minutes. Used for simultaneous rotary and linear moves so the feed is correct.
Format
G93 G01 X Y Z A B F
Addresses
| Address | What it does |
|---|---|
F | Moves per minute, 1 divided by the time in minutes for the block |
X Y Z A B | End point of the move |
How it works
Modal, feed group 05. Cancel with G94.
Example program
G93 G01 X1. A90. F2. (MOVE TAKES HALF A MINUTE)
X2. A180. F4. (MOVE TAKES A QUARTER MINUTE)
G94 (BACK TO FEED PER MINUTE)
X2. A180. F4. (MOVE TAKES A QUARTER MINUTE)
G94 (BACK TO FEED PER MINUTE)
Example is in inch. Check offsets and clearances first.
Watch out for
- An F word is needed on every move line in G93.
- CAM output for 4 and 5 axis work often uses G93. Do not hand edit feeds without doing the math.
Related codes
G93 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Inverse time feed |
| 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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