I use the flex tool quite a bit at Work, I flex Conveyor Side Frames for curve conveyors.

I understand the basics just fine, and I get moving the Triad to a specific point, but what I don't get is the Triad Angles.

I don't get where Solidworks gets the angles it picks when I select the Flex tool. For example the part I'm working on right now, the X angle is 273.71°, the Y is 90°, and the Z is 356.24° yet my trim planes are vertical, just like I want them. But sometimes the trim planes will be at some odd angle, and If I try to set the angles at 90 or 180 or something that it would seem they should be, they are nowhere near being horizontal or vertical.

Solidworks Help doesn't really get specific on this, I've tried Google searching but haven't come up with anything definitive.

Thank You In Advance!