A FANUC ArcMate 120iB weave follows the active tool frame. For a fillet weld between a flat plate and a 90-degree plate, establish the torch orientation and tool frame first, then use weave azimuth when the required weave direction cannot be obtained by rotating the torch.
Why the weave direction follows the torch
The weave motion is relative to the tool frame. An incorrect tool frame can therefore make a valid weave command move in the wrong plane. For a 45-degree corner approach, first confirm that the torch is oriented at the required 45-degree angle relative to the work and that the active tool frame represents the torch correctly.
Configure the weave azimuth
When the torch approach angle remains fixed, azimuth changes the weave direction without requiring a torch rotation. The evidence describes azimuth as the angle between the weave vector and the weave-frame Y-axis.
- Verify the active tool frame against the physical torch.
- Confirm the programmed torch approach angle at both seam points.
- Open MENU > SETUP > Weave.
- Scroll to Azimuth and enter 45 degrees for the requested diagonal weave orientation.
- Test the motion under safe commissioning conditions before welding.
| Azimuth setting | Evidence-supported interpretation |
|---|---|
| 45 degrees | Rotates the weave direction toward the requested diagonal orientation. |
| 90 degrees | Reported to resemble a back-step motion rather than conventional side-to-side weaving; verify the resulting path on the robot. |
Verify the resulting weave plane
Run or observe the programmed seam under safe commissioning conditions and confirm that the weave crosses the joint at the intended angle. If it does not, recheck the tool frame before changing azimuth again: because the weave follows that frame, a frame error can appear to be an azimuth error. The available evidence does not identify controller software, firmware, or option dependencies, so confirm that the named Weave setup screen and Azimuth field exist on the installed controller.
FAQ
Can a FANUC ArcMate 120iB weave at 45 degrees?
Yes. With the tool frame and torch approach set correctly, open MENU > SETUP > Weave and set Azimuth to 45 degrees, then verify the path before welding.
Why is my FANUC weave moving in the wrong plane?
The weave motion follows the active tool frame. Verify that the tool frame accurately represents the torch before adjusting the weave azimuth.
What does a 90-degree weave azimuth do?
The evidence reports that 90 degrees can produce motion resembling a back step instead of normal side-to-side weaving. Confirm the actual path under safe commissioning conditions.
