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G97 Constant RPM
Mazak (EIA) G-code · Lathe
S is spindle RPM. Use it for threading, drilling on center and parts that must not change speed.
Format
G97 S
Addresses
| Address | What it does |
|---|---|
S | Spindle speed, RPM |
How it works
Modal until G96.
Example program
T0505 (.500 DRILL)
G97 S1500 M03 (1500 RPM)
G00 X0. Z.1 M08 (ON CENTER)
G97 S1500 M03 (1500 RPM)
G00 X0. Z.1 M08 (ON CENTER)
Example is in inch. Check offsets and clearances first.
Watch out for
- Give a new S with G97, or the spindle stays at the last G96 speed.
Related codes
G97 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Constant surface speed cancel |
| Haas NGC | Constant surface speed off |
| Okuma OSP | Constant surface speed off |
| Mitsubishi M70 M80 | Constant surface speed off |
| Siemens 840D 828D | Cancel constant cutting speed |
| Fagor 8055 8065 | Constant tool center feed (mill) |
| LinuxCNC Tormach | Spindle RPM mode |
| Mach3 Mach4 | Constant RPM, Mach4 |
| Centroid CNC12 Acorn | Constant surface speed cancel |
| Hurco WinMax (NC) | Direct spindle RPM |
| Swiss (Citizen Star) | Constant RPM |
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