G43.4 | Fanuc

G0 Z10. G49 (CANCEL TCPC) G91 G28 Z0 M30 % | Rule | Explanation | |------|-------------| | H required | G43.4 H_ – No H means no length compensation | | Single block | Better to put G43.4 alone or with H only | | Position before | Usually go to safe XY, Z above part before activating | | Canned cycles | Not allowed (G81, G83, etc.) | | Tool length | Applied at TCP point (usually tool tip, not gauge line) | | Cancel | G49 cancels G43.4 | Compare G43.4 vs G43 | Function | G43 | G43.4 | |----------|-----|-------| | Compensation direction | Z only | 3D (X, Y, Z with rotation) | | Rotary movement | Tool tip moves | Tool tip stays fixed | | Use | 3-axis | 5-axis simultaneous | Cancel Example (Safe End) G0 Z50. ; Retract before canceling G49 ; Cancel TCPC G91 G28 Z0 ; Home Z G91 G28 Y0 M30 Troubleshooting Problem – Rotary axis moves suddenly on G43.4 activation. Fix – Move to safe position first (e.g., G0 X0 Y0 Z100.)

G1 X50. Y20. F3000. G1 Z-4. G1 A60. B45. fanuc g43.4

; Tool tip stays fixed while rotating G1 A30. B30. F2000. G0 Z10

G43.4 H1 ; Activate, use tool length offset 1 O1000 (G43.4 DEMO - 5AXIS) G90 G80 G40 G17 G94 G54 G91 G28 Z0 T1 M06 (BALL ENDMILL) S10000 M03 G90 G0 X0 Y0 Z10. G43.4 H1 (ACTIVATE TCPC) G0 X0 Y0 Z5. G1 Z-2. F1000. Fix – Move to safe position first (e

– Alarm “IMPROPER G-CODE” on G43.4. Fix – Check parameter 7600 and that machine has 5‑axis option.

– Tool crashes on cancel. Fix – Always retract in Z before G49. Would you like a version for G43.5 (Tool Center Point Control with manual compensation) or a post‑processor snippet (e.g., for CAM output)?