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Alignment-rotate

Heming
I measured a line theoretically parallel to the X-axis but not at z=0 plane. I want to align X-axis paralell to this line but won't change the origin. So I used ROTATE XLUS around YPLUS. IT is not right.

When I did the initial alingment, I measured a cylinder, whose center line is Y-axis. So I used ROTAE YPLUS around ZPLUS. It seems right to me. What did I do wrong for the the above case?
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  • The cylinder center line is Y-axis. And X,Z origins are on the center line. The face of the cylinder is Y origin. My flat surface is not in the Z=0 plane and not along Y-axis. I measured a line along X direction on the flat. Then I ROTAE XPLUS around YPLUS. That was I envisioned should be. But the result was wrong. I have no idea why.
    were you in the correct workplane to MEASURE the line? Has to be in the same workplane (and it has to be correct) that you are rotating "ABOUT".
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  • The cylinder center line is Y-axis. And X,Z origins are on the center line. The face of the cylinder is Y origin. My flat surface is not in the Z=0 plane and not along Y-axis. I measured a line along X direction on the flat. Then I ROTAE XPLUS around YPLUS. That was I envisioned should be. But the result was wrong. I have no idea why.
    were you in the correct workplane to MEASURE the line? Has to be in the same workplane (and it has to be correct) that you are rotating "ABOUT".
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