CNC Machinist Calculator UltraG44 Tool length compensation minus
Fanuc G-code · Mill
Subtracts the H offset from the Z position instead of adding it. Rarely used. Most shops always use G43 with offsets set to match.
Format
G44 Z H
Addresses
| Address | What it does |
|---|---|
Z | First Z position with the offset applied |
H | Tool length offset number |
How it works
Modal, group 08. Cancel with G49.
Example program
G90 G54 G00 X0. Y0. (POSITION)
G44 H02 Z1. (OFFSET SUBTRACTED)
G49 (CANCEL)
G44 H02 Z1. (OFFSET SUBTRACTED)
G49 (CANCEL)
Example is in inch. Check offsets and clearances first.
Watch out for
- Using G44 with offsets measured for G43 moves the tool the wrong way by twice the offset. Very dangerous.
- Only use it if the whole shop sets offsets for G44.
Related codes
G44 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| 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 |
| Centroid CNC12 Acorn | Tool length compensation minus |
| Hurco WinMax (NC) | Tool length offset minus |
| Fadal | Tool length compensation negative |
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