CNC Machinist Calculator UltraG49 Tool length compensation cancel
Fanuc G-code · Mill
Cancels G43 or G44 tool length compensation. The Z position then refers to the spindle gauge line, not the tool tip.
Format
G49
How it works
Modal, group 08. Usually the power on default.
Example program
G00 Z1. M09 (CLEAR PART)
G49 G91 G28 Z0. (CANCEL LENGTH, Z HOME)
G90 (ABSOLUTE)
G49 G91 G28 Z0. (CANCEL LENGTH, Z HOME)
G90 (ABSOLUTE)
Example is in inch. Check offsets and clearances first.
Watch out for
- The Z axis may move by the offset amount when G49 is read. Give it at a safe height, or with G91 G28 Z0.
- Put G49 in the safe start line.
Related codes
G49 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Haas NGC | Tool length compensation cancel |
| Mazak (EIA) | Tool length offset cancel |
| Mitsubishi M70 M80 | Tool length comp cancel |
| Brother Speedio | Tool length offset cancel |
| LinuxCNC Tormach | Tool length offset cancel |
| Mach3 Mach4 | Tool length offset cancel |
| Centroid CNC12 Acorn | Tool length compensation cancel |
| Hurco WinMax (NC) | Tool length offset cancel |
| Fadal | Tool length offset cancel |
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