CNC Machinist Calculator UltraM04 Spindle on, reverse
Fanuc M-code · Mill and lathe
Starts the spindle in reverse. Used for left hand tools and some tools mounted upside down.
Format
M04 [S]
Addresses
| Address | What it does |
|---|---|
S | Speed |
How it works
Modal until M03 or M05.
Example program
T0404 (LEFT HAND TOOL)
G97 S800 M04 (SPINDLE REVERSE)
G00 X1. Z.1 (APPROACH)
G97 S800 M04 (SPINDLE REVERSE)
G00 X1. Z.1 (APPROACH)
Example is in inch. Check offsets and clearances first.
Watch out for
- A wrong direction rubs the insert and can break it. Check the cutting edge faces the work.
Related codes
M04 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Haas NGC | Spindle on counterclockwise |
| Doosan (Fanuc) | Left spindle reverse rotation |
| DMG Mori MAPPS (Fanuc) | Spindle start(reverse) |
| Mazak (EIA) | Spindle reverse rotation |
| Okuma OSP | Spindle counter clockwise (Lathes & Mills) |
| Mitsubishi M70 M80 | Spindle on counterclockwise |
| Brother Speedio | Spindle on counterclockwise |
| Siemens 840D 828D | Spindle on counterclockwise |
| Heidenhain TNC (ISO) | Spindle on counterclockwise |
| Fagor 8055 8065 | Spindle counterclockwise |
| LinuxCNC Tormach | Spindle counterclockwise |
| Mach3 Mach4 | Spindle on counterclockwise |
| Centroid CNC12 Acorn | Spindle on counterclockwise |
| Hurco WinMax (NC) | Spindle on counterclockwise |
| Fadal | Spindle on counterclockwise |
| Swiss (Citizen Star) | Main spindle reverse |
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