CNC Machinist Calculator UltraM46 Positive approach on
Fadal M-code · Mill
Makes the axes always approach a point from the same direction to take out backlash.
Verify on your machine. This entry could not be fully checked against the maker manual. Check your machine manual before you run it.
Format
M46
How it works
Modal until M47.
Example program
N1 G0 G40 G49 G80 G90 G17 (FORMAT 2 SAFE START)
N2 M46 (POSITIVE APPROACH ON)
N3 G0 G90 G54 X1. Y1.
N4 M47 (OFF)
N2 M46 (POSITIVE APPROACH ON)
N3 G0 G90 G54 X1. Y1.
N4 M47 (OFF)
Example is in inch. Check offsets and clearances first.
Watch out for
- Adds a small overshoot move. Leave room near walls.
Related codes
M46 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Haas NGC | Jump if pallet loaded |
| Doosan (Fanuc) | P.T.S.Body clamp & bar advance |
| DMG Mori MAPPS (Fanuc) | Sensor selection signal ON |
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Open M46 in the app All Fadal M-codes