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G93 Inverse time feed
Mach3 Mach4 G-code · Mill
F means 1 divided by the move time in minutes. Used mainly for moves with a rotary axis.
Format
G93
Addresses
| Address | What it does |
|---|---|
G93 | No address words |
How it works
Modal, feed mode group. Cancel with G94.
Example program
G0 G20 G90 G54 G17 G40 G49 G80 (SAFE START, INCH)
G93 (INVERSE TIME)
G1 X1.0 A90.0 F2.0 (MOVE TAKES HALF A MINUTE)
X2.0 A180.0 F4.0 (QUARTER MINUTE)
…
G93 (INVERSE TIME)
G1 X1.0 A90.0 F2.0 (MOVE TAKES HALF A MINUTE)
X2.0 A180.0 F4.0 (QUARTER MINUTE)
…
The full 5-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- Every G1, G2 and G3 needs its own F word in G93.
- Canned cycles and G31 are not allowed in G93 on Mach3. Go back to G94 after.
Related codes
G93 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Inverse time feed |
| Haas NGC | Inverse time feed mode |
| Fagor 8055 8065 | Polar origin preset |
| LinuxCNC Tormach | Inverse time feed |
| Centroid CNC12 Acorn | Inverse time feed |
| Hurco WinMax (NC) | Inverse time feed |
| Fadal | Inverse time feed |
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Open G93 in the app All Mach3 Mach4 G-codes