One of the limitations of 4-axis tube cutting machines is that they can't cut bevels. This can be a serious issue when one of your parts needs a miter cut. Since movement is only allowed in X, Y, Z, and A (chuck rotation) directions, any attempt at burning an angled end will result in deformed and unusable cuts (until it has been ground down into a workable weld prep).
But through 4-axis geometry compensation, SigmaTUBE has an easy solution to this problem.
To get started, remodel the part to get proper normal-to-surface faces to apply toolpath. Then, enable 4-Axis Modification in the Configuration > Toolpath settings. You can also apply this setting to a specific part, nest, or loop (see the SigmaTUBE Help Center for more details).
When you apply toolpath, it will be modified to follow the inside diameter of the tube, leaving a useful and preferred weld gap on your miter cuts.
Once activated, you can immediately see the new toolpath assigned to the loop.
The following image compares the side profile of a miter cut without geometry compensation (gray) to that of a miter cut with geometry compensation (red).