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G16 Polar coordinate command
Brother Speedio G-code · Mill
X becomes the radius and Y becomes the angle from the current origin. Handy for bolt circles.
Verify on your machine. This entry could not be fully checked against the maker manual. Check your machine manual before you run it.
Format
G16 then X radius Y angle
Addresses
| Address | What it does |
|---|---|
X | Radius from origin |
Y | Angle in degrees, CCW from plus X |
How it works
Modal, polar group. Cancel with G15.
Example program
G52 X2. Y2. (MOVE ORIGIN TO BOLT CIRCLE CENTER)
G16 (POLAR ON)
G81 X1.5 Y0 Z-.3 R.1 F10. (HOLE 1)
Y120. (HOLE 2)
…
G16 (POLAR ON)
G81 X1.5 Y0 Z-.3 R.1 F10. (HOLE 1)
Y120. (HOLE 2)
…
The full 7-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- The center is the work zero unless you shift it with G52 first.
- Forgetting G15 makes the next X Y move go to a strange place.
Related codes
G16 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Polar coordinate command |
| Mazak (EIA) | Polar coordinate input on |
| Okuma OSP | Work coordinate system select, one block |
| Heidenhain TNC (ISO) | Tangential arc, polar |
| Fagor 8055 8065 | Main plane by two axes |
| Mach3 Mach4 | Polar coordinates on |
| Hurco WinMax (NC) | Polar coordinates |
Every G-code for Brother Speedio 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 G16 in the app All Brother Speedio G-codes