Please explain "Specified trajectory is not valid"

[nkpham]

I created a 3D curve from an equation. Then I used the split curve option to segment my curve into multiple trajectories. When I try to use some of these curves as sweep trajectories, I get the above message. Does anyone know what is going on? I don't understand why some of the trajectories work and some don't. I created all of them the same way.

 

[Guest]

For some reason, sweeps don't work on some 3D curves, namely Curve by Equation, and Curve Thru Pnts using the Tweak Option. There are probably others, but I don't have a list.



Try using a swept blend instead of a sweep.

 

[nkpham]

This brings up another problem..... When I import the data for the sketch, I can't align it to where I would like it to. There is a free rotate and a scaling factor for the sketch I import, but I can't get it to align to the exact points I want. Is there a way to highlight the whole sketch and permanently group them so I can move them together?

 

[termar]

PTC's TPI 21286 gives a good list of what type curves work with curve sweep and curve blend features.

 

[magi]

u can make a point in the active sketch and allign the imported sketchs point with the active point of active sketch. i faced the same problem when i was modelling a tooth u can also create perpendicular centerlines in both places so u can allign them atleast with 99 % accuracy.

magi

 

[miked]

The reason sweeps dont work with some 3d curves is because you need a reference for the section. You can get around this by using a var sec sweep. There is another way around it but I havent seen your sketch so its hard to explain.

This is a sore point for me because rhino can sweep almost anything along a curve.



I have mentioned this at the TC meetings and the programmers say that rhino is crap and they could code it in a weekend. If thats the case they should take twenty minutes and write this code for us.



Sorry for the rant, Iam warming up for the TC meeting in Orlando next week

Mike

 

[magi]

hey can u explain me what is rhino ?

if possible can u mail me in detail to magi_seenu@sify.com



magi

 

[miked]

www.rhino3d.com

Its a really cheap surface modeller that I use as a file converter. I can open/ create just about any file type.

I use it to quickly pare down my clients iges files before importing to pro.

Mike

 

[Rajesh]

Instead of sweep, use swept blend.

Regards,

Rajesh S

 

[Brian_Adkins]

See chart on this thread:



http://www.proecentral.com/portal/forum/msgDetail.asp?msg_id=2274&for_id=15



-Brian Adkins