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M174 Main chuck pressure adjust
Haas NGC M-code · Lathe
Sets the main spindle chuck pressure from the program on machines with the programmable chuck pressure option. P is the pressure as a whole number.
Format
M174 P
Addresses
| Address | What it does |
|---|---|
P | Chuck pressure, whole number |
How it works
Stays until a new value is given.
Example program
M05 (SPINDLE STOP)
M11 (UNCLAMP)
M174 P150 (LOWER CHUCK PRESSURE FOR THIN WALL)
M10 (CLAMP AT NEW PRESSURE)
M11 (UNCLAMP)
M174 P150 (LOWER CHUCK PRESSURE FOR THIN WALL)
M10 (CLAMP AT NEW PRESSURE)
Example is in inch. Check offsets and clearances first.
Watch out for
- To lower pressure the spindle must be stopped and the chuck unclamped, then clamped again.
- Out of range values give a message. The max depends on chuck size.
Related codes
M174 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Doosan (Fanuc) | Auto b-axis un or clamp off & b-axis unclamp |
| Mazak (EIA) | Index 180°(KOUYOU) |
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