Haas Mill · G-code
G98 Canned Cycle Initial Point Return
After each hole, retracts to the Z height the tool was at before the cycle started. Clears clamps between holes.
What G98 does on a Haas mill
G98 and G99 decide where the tool goes after each hole in a canned cycle. G98 returns to the initial point — the Z position before the cycle line. G99 returns only to the R plane, which is faster.
Use G99 when the path between holes is clear and G98 when there is a clamp, a boss or a step between them.
G98 format
| Address | Meaning |
|---|---|
G98 | Return to initial Z |
G99 | Return to R plane |
G98 example program
G00 Z1.
G81 G99 X1. Y1. Z-0.25 R0.1 F10.
G98 X4. (clamp in between: go back up to Z1.)
G99 X5.
G80⚠ Watch out
On a Haas lathe, G98 and G99 mean feed per minute and feed per revolution. Same numbers, completely different meaning.
Related codes
G98 questions
What is the difference between G98 and G99 on a mill?
G98 retracts to the initial Z height after each hole; G99 retracts to the R plane.
Independent reference. Not affiliated with, sponsored by or endorsed by Haas Automation, Inc. Haas is a trademark of its respective owner. Always confirm codes against your machine's operator manual — options and settings vary by model and software version.