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G96 Constant surface speed
Mazak (EIA) G-code · Lathe
S is surface feet per minute. The RPM goes up as the diameter gets smaller. Always set a G50 S clamp first.
Format
G96 S
Addresses
| Address | What it does |
|---|---|
S | Surface speed, feet per minute in inch mode |
How it works
Modal until G97.
Example program
T0101 (OD TURNING TOOL)
G50 S3000 (RPM CLAMP)
G96 S650 M03 (650 SFM)
G00 X2. Z.1 M08 (START)
G50 S3000 (RPM CLAMP)
G96 S650 M03 (650 SFM)
G00 X2. Z.1 M08 (START)
Example is in inch. Check offsets and clearances first.
Watch out for
- Without G50 S the spindle can run to maximum when facing to center.
- Do not thread or drill on center in G96.
Related codes
G96 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Constant surface speed |
| Haas NGC | Constant surface speed on |
| Okuma OSP | Constant surface speed on |
| Mitsubishi M70 M80 | Constant surface speed on |
| Siemens 840D 828D | Constant cutting speed |
| Fagor 8055 8065 | Constant feed at cutting point (mill) |
| LinuxCNC Tormach | Constant surface speed |
| Mach3 Mach4 | Constant surface speed, Mach4 |
| Centroid CNC12 Acorn | Constant surface speed |
| Swiss (Citizen Star) | Constant surface speed |
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