No one else had this question
For understanding did you want to use your 3D for a CNC cutting laser like this one?
Laser tube cutting machines | BLM GROUP - YouTube
Or here you must to find as "laser cutting tube":
How to Notch/Cope structural members/tubes here @Igor Fomenko has the best solution
Thank you very much for your answer,,, but the above links have not been able to solve my problem, in the design tree cannot exceed 3 datum, and the need to cut the pipe, the axis line to line with any axis
1. establish a sketch with reference.Constrain the sketch with a trigonometric function
2.Making pipeline entity
3.Use ellipse to make the section of resection, and use trigonometric function to constrain it.
4.Select the line in the sketch 1 as the path of the excision
That's the perfect answer I want. Thank you for your active participation.
Cres lu
From China
1. Use "insert into new part" command as Ned suggested.
You`ll get derived part in Assembly coordinate system
2. Use Insert->Features->Move/Copy feature to align coordinate systems as you wish
That's all!