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M04 Spindle on counterclockwise
Brother Speedio M-code · Mill
Starts the spindle in reverse at speed S. Used for left hand taps.
Format
M04 S
Addresses
| Address | What it does |
|---|---|
S | Spindle speed in RPM |
How it works
Modal, spindle group.
Example program
G100 T06 G90 G54 G00 X1. Y1. G43 H06 Z1. (LH TAP)
S500 M04 (SPINDLE ON CCW)
G99 G74 Z-.5 R.1 F25. (LH TAP)
G80 (CANCEL)
S500 M04 (SPINDLE ON CCW)
G99 G74 Z-.5 R.1 F25. (LH TAP)
G80 (CANCEL)
Example is in inch. Check offsets and clearances first.
Watch out for
- Right hand drills in M04 will rub and burn.
Related codes
M04 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Spindle on, reverse |
| 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 |
| 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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