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G33 Electronic threading
Fagor 8055 8065 G-code · Mill and lathe
Single point threading synchronized with the spindle encoder. L is the thread pitch. Q sets the spindle start angle for multi start threads.
Format
G33 X..C L [Q]
Addresses
| Address | What it does |
|---|---|
X..C | End point of the thread |
L | Thread pitch |
Q | Spindle start angle in degrees, optional |
How it works
Modal. Replaced by G00, G01, G02 or G03.
Example program
G00 G90 X0.95 Z0.2 S600 M03 (START OF THREAD, 1 INCH 16 TPI)
G33 Z-1.0 L0.0625 (THREAD PASS)
G00 X1.2 (PULL OUT)
Z0.2 (BACK TO START)
G33 Z-1.0 L0.0625 (THREAD PASS)
G00 X1.2 (PULL OUT)
Z0.2 (BACK TO START)
Example is in inch. Check offsets and clearances first.
Watch out for
- For inch threads L is the pitch in inches. 16 TPI is L0.0625.
- Override is fixed at 100 percent during G33. Keep feed hold in mind.
- Q needs spindle parameter M19TYPE set to 1.
Related codes
G33 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Thread cutting, constant lead |
| Okuma OSP | Fixed thread cycle, longitudinal |
| Siemens 840D 828D | Thread cutting with constant lead |
| LinuxCNC Tormach | Spindle synchronized motion |
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