I have sub assembly, that I have downloaded off of the internet. I have a part I designed in NX. I have these two parts in an assembly.
When I use the Align command with the align option, and I align the centerlines. The sub assembly flips 45 degrees or so.
When I use the align with infer center axis,and I align the centerlines, the sub assembly aligns itself as it should and does not rotate.
Please explain some possible reasons for the sub assembly flipping when I use the align with the align option.
Solved! Go to Solution.
Difficult to say on vauge information.... However are you consistent when selecting the lines to align - they have directional sense. If selected differently they might cause your flipping issues...
This is due to the directional sense of the entities selected and the solver. However there is a quick fix to your problem by using the "Reverse Last Constraint" on the Assembly Constraints menu during the creation - it will immediately realign to your default position or more the alignment there of. Have a look at the attached movie. you will see that the component is not rotated it is flipped.
"directional sense of the entities" I do not understand directional sense? Is there a way we can visual see this? Or display this?
But using the Reverse constraint will work. Thanks for the help.
I think he means that some entities have orientations - like a line has a start and end or a plane has positive and negative direction. If you pick near the end of a line, that might cause the directions to be reversed compared to picking at the start end. Same goes for faces, theoretical centerlines/axes, etc.
I'm not sure about being able to display it onscreen. I just get into the habit of looking for the reverse direction (dark blue arrows pointing opposite directions) or alternate solution (3 arrows arranged in a circular pattern pointing at numbers 1, 2, 3) buttons when dealing with constraints and using those icons to see if the results are what I want or not.
NX 220.127.116.11 MP11 Rev. A
GM TcE v18.104.22.168
GM GPDL v11-A.3.7