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G78 Left hand tapping cycle with pitch input
Brother Speedio G-code · Mill
Left hand version of G77. The pitch is given and the control works out the feed.
Verify on your machine. This entry could not be fully checked against the maker manual. Check your machine manual before you run it.
Format
G78 X Y Z R J [I] [L]
Addresses
| Address | What it does |
|---|---|
X Y | Hole position |
Z | Thread depth |
R | R plane |
J | Pitch in inches |
I | Pitch in millimeters |
L | Return spindle speed |
How it works
Modal, canned cycle. Cancel with G80.
Example program
G100 T06 G90 G54 G00 X1. Y1. G43 H06 Z1. S800 M04 (.375-16 LH TAP)
G98 G78 Z-.6 R.1 J.0625 (16 TPI PITCH)
G80 G00 Z1. (CANCEL)
G98 G78 Z-.6 R.1 J.0625 (16 TPI PITCH)
G80 G00 Z1. (CANCEL)
Example is in inch. Check offsets and clearances first.
Watch out for
- Use with M04 or a left hand tap only.
Related codes
G78 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Okuma OSP | Left hand tapping cycle |
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