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G84 Right hand tapping cycle / Tapping cycle
Centroid CNC12 Acorn G-code · Mill, Lathe
On mills: Right hand tapping cycle
Taps a right hand thread. Start the spindle in M3. For a floating holder feed and RPM set the pitch. With rigid tapping on, Q gives the thread lead.
Format
Addresses
| Address | What it does |
|---|---|
X Y | Hole position |
Z | Hole bottom |
R | R plane |
Q | Thread lead for rigid tapping, needed on every line |
P | Dwell at bottom |
F | Feed for floating tap, RPM times pitch |
How it works
Modal, canned cycle. Cancel with G80.
Example program
G54 G0 X.337 Y.925
S600 M3
G43 H15 Z1. M8
…
The full 7-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- Rigid tapping Q is not modal. Put Q on every hole line or the next hole uses floating feed.
- Rigid tapping needs parameter 36 on and a spindle encoder. Parameter 82 tunes depth.
- Feed hold is off in the cycle. Program Z a little short of a blind hole bottom.
On lathes: Tapping cycle
Taps on center. M29 sets right hand, M29 P1 sets left hand. With rigid tapping on, Q sets the lead and must be on every tap line.
Format
Addresses
| Address | What it does |
|---|---|
X | X position, normally X0 |
Z | Tap depth |
R | Return point |
Q | Thread lead for rigid tapping |
F | Feed for a floating tap |
How it works
Modal, canned cycle. Cancel with G80.
Example program
M29 ; RIGHT HAND TAP MODE
G97 S300 M3
G0 X0 Z.25 M8
…
The full 7-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- Run M29 before the cycle. Right hand is the default at job start.
- Start the spindle M3 for right hand or M4 for left hand.
- Feed hold is off in the cycle. Program Z a little short of a blind hole bottom.
Related codes
G84 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Tapping cycle |
| Haas NGC | Tapping canned cycle |
| Mazak (EIA) | Tapping cycle |
| Okuma OSP | Tapping cycle |
| Mitsubishi M70 M80 | Tapping cycle |
| Brother Speedio | Tapping cycle |
| Fagor 8055 8065 | Tapping canned cycle |
| LinuxCNC Tormach | Right hand tapping cycle |
| Mach3 Mach4 | Tapping cycle |
| Hurco WinMax (NC) | Tapping cycle |
| Fadal | Right hand tap, floating holder |
| Swiss (Citizen Star) | Face tapping cycle |
Every G-code for Centroid CNC12 Acorn in your pocket. The app has the full example programs, search by number or shop word, a line decoder and calculators for tapping, threading and drilling.
Open G84 in the app All Centroid CNC12 Acorn G-codes