sweeps?

[gkling]

Is it possible to have a sweep about a 3 dimensional trajectory?

 

[gggggggggg]

yes. do you have a specific question?

 

[gkling]

Well that's my problem, how do you sketch a 3d trajectory? That is, a sketch along the X, Y and Z planes?

 

[gggggggggg]

there are a number a ways to sketch a 3-d trajectory.



you need to create a datum curve. you could do this by the 2 projection method, or project a curve onto a surface, or from equation.

 

[nkpham]

i prefer using the equation method. you can input the trajectory using either the cartesian or the polar system. if not, so what hazmatt suggests using the 2 projection method. it will combine the two separate curves you make.

 

[nkpham]

i forgot.... you can also create 3d splines from points

 

[gggggggggg]

in response to nkpham:



a 3d curve created thru points will not work as the trajectory of a regular sweep. it is an invalid trajectory. a variable section sweep must be used to utilize a curve thru points.

 

[Brian_Adkins]

This is a good reference sheet:



-Brian



View attachment 230

 

[le1034]

excellent

 

[gkling]

OK, thank you all very much I've sorted it!!