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M03 Spindle on clockwise / Spindle on forward
Haas NGC M-code · Mill, Lathe
On mills: Spindle on clockwise
Starts the spindle clockwise at the S speed. This is the normal direction for right hand tools.
Format
M03 S
Addresses
| Address | What it does |
|---|---|
S | Spindle speed in RPM |
How it works
Modal, stays on until M04, M05, M00, M30 or a tool change.
Example program
T1 M06 (TOOL 1)
G90 G54 G00 X0. Y0. S2500 M03 (SPINDLE ON CW AT 2500 RPM)
G43 H01 Z1. M08 (LENGTH COMP AND COOLANT)
G90 G54 G00 X0. Y0. S2500 M03 (SPINDLE ON CW AT 2500 RPM)
G43 H01 Z1. M08 (LENGTH COMP AND COOLANT)
Example is in inch. Check offsets and clearances first.
Watch out for
- Give S on the same line or before. M03 with no speed set does not turn the spindle.
- Setting 144 can hold spindle speed override at the current value.
On lathes: Spindle on forward
Starts the main spindle forward at the S speed. Forward is clockwise looking from the tailstock toward the chuck on a standard turret lathe.
Format
M03 [S]
Addresses
| Address | What it does |
|---|---|
S | Spindle speed, RPM in G97 or surface speed in G96 |
How it works
Modal until M04 or M05.
Example program
T0101 (OD TOOL)
G50 S3000 (MAX 3000 RPM)
G96 S500 M03 (CSS 500 SFM, SPINDLE FORWARD)
G50 S3000 (MAX 3000 RPM)
G96 S500 M03 (CSS 500 SFM, SPINDLE FORWARD)
Example is in inch. Check offsets and clearances first.
Watch out for
- Set G50 before G96 S M03 so the spindle has a speed limit.
- Close the door. The spindle will not start with the door open in normal mode.
Related codes
M03 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Spindle on, forward |
| Doosan (Fanuc) | Left spindle forward rotation |
| DMG Mori MAPPS (Fanuc) | Spindle start(normal) |
| Mazak (EIA) | Spindle normal rotation |
| Okuma OSP | Spindle clockwise (Lathes & Mills) |
| Mitsubishi M70 M80 | Spindle on clockwise |
| Brother Speedio | Spindle on clockwise |
| Siemens 840D 828D | Spindle on clockwise |
| Heidenhain TNC (ISO) | Spindle on clockwise |
| Fagor 8055 8065 | Spindle clockwise |
| LinuxCNC Tormach | Spindle clockwise |
| Mach3 Mach4 | Spindle on clockwise |
| Centroid CNC12 Acorn | Spindle on clockwise |
| Hurco WinMax (NC) | Spindle on clockwise |
| Fadal | Spindle on clockwise |
| Swiss (Citizen Star) | Main spindle forward |
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