Haas-specific codes
| Function | Code |
|---|---|
| Accuracy / smoothness control | G187 P1/P2/P3 E.. |
| Tool centre point control (5-axis) | G234 |
| Dynamic work offset (3+2) | G254 / cancel G255 |
| Extended work offsets | G154 P1–P99 |
| Through-spindle coolant | M88 / M89 |
| Auto air jet | M83 / M84 |
| 4th / 5th axis brake | M10/M11, M12/M13 |
Example: Haas UMC 3+2 with DWO
T3 M06
G00 G90 G54
M11 (unclamp A)
M13 (unclamp C)
G00 A-30. C90.
M10 (clamp A)
M12 (clamp C)
G254 (dynamic work offset on)
G00 X10. Y20.
G43 H03 Z50. S8000 M03
G187 P2 E0.02
(... machining ...)
G255 (DWO off)UMC and trunnion machines
Haas UMC machines use A/C or B/C trunnions depending on model. With G234 TCPC and G254 DWO, the controller uses machine rotary zero point data (measured on the machine), so programs are not tied to exact fixture position relative to the rotary centre.
Settings that affect the post
- Rotary rollover and shortest-path settings.
- Decimal point handling and units.
- Tool change behaviour and tool pre-select.
- Probing option (Renishaw WIPS) for setup macros.
Haas lathes
Haas ST lathes with live tooling and Y-axis need posts that output C-axis, live tool spindle codes and Haas lathe canned cycles correctly.
A Haas post that uses G187, G234 and G254 properly gets far more from the machine than a generic FANUC post.
Haas post development
See our CNC post processor development service and VMC post development.