For UMC owners:

When you install Mastercam (2022, 2023, 2024, 2025, etc.), generic Haas posts are included. Look in:

| Switch | Function | Recommended Haas Setting | |--------|----------|--------------------------| | arcoutput | Arc format | 0 = IJK (absolute) or 1 = R (Haas handles both, but IJK is safer) | | arctype | Planes | 2 = Full circle (Haas needs break arcs? Default = yes) | | use_rot_lock | 4th axis lock | 1 = Unlock rotary before indexing (Haas HRT) | | coolant | M08 vs M07 | 0 = Flood, 1 = Mist, 2 = Through tool (check your machine) | | rigid_tap | G84.1 vs G84 | Set to 1 for Haas rigid tapping (requires spindle encoder) | | hpcc | High Precision Contour Control | 1 = Enable G187 P3 (finishing) | | workofs | G54–G59 base | 0 = G54, 1 = G55, etc. | | probe | Probing macro support | 1 = Use G65 P9832 (Renishaw on Haas) |

A generic Fanuc post might work, but it won’t optimize cycles or handle Haas-specific features like macros or WiFi probing routines.

Here are the most important switches for Haas:

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