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G44 Tool length compensation minus
Centroid CNC12 Acorn G-code · Mill
Applies the H offset in the minus direction. Used when the spindle face is treated as a zero length tool and offsets are measured down from an absolute machine home.
Format
G44 H
Addresses
| Address | What it does |
|---|---|
H | Tool length offset number |
How it works
Modal. Cancel with G49.
Example program
G20 G17 G40 G49 G80 G90 ; INCH, SAFE START
T1 M6 ; LOAD TOOL 1, Z GOES HOME FIRST
G54 G0 X0 Y0 ; WORK OFFSET 1
S3000 M3
…
T1 M6 ; LOAD TOOL 1, Z GOES HOME FIRST
G54 G0 X0 Y0 ; WORK OFFSET 1
S3000 M3
…
The full 6-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- Most shops use G43. Use G44 only if the offsets were set up for it.
Related codes
G44 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Tool length compensation minus |
| Haas NGC | Tool length compensation minus |
| Mitsubishi M70 M80 | Tool length comp minus |
| Brother Speedio | Tool length offset minus |
| Fagor 8055 8065 | Tool length compensation cancel |
| Mach3 Mach4 | Tool length offset minus |
| Hurco WinMax (NC) | Tool length offset minus |
| Fadal | Tool length compensation negative |
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Open G44 in the app All Centroid CNC12 Acorn G-codes