Loft doesn't have consistent cross section

[Anonymous]

I am trying to model a fork of a bike using a Loft command and I keep getting a cross section that necks between (2) of my section. The more sections I put in it just keeps moving up my center line. I am apparently doing something wrong. Any help would be appreciated. I have attached the model.

[JDMather]

I would use as few sections as possible and add some Guide Rails.

Also, you should install the latest Service Pack for your version of Inventor.

[johnsonshiue]

Hi! Here is an alternative using Guide Rail Sweep. It does not pass through all the sections exactly but fairly close. The section transition is a lot smoother. The reason why Loft does not work as well in this case is that the Loft is under-defined. Any G2 surface passing these sections can be considered a legitimate solution. Keeping section transition smooth isn't a criterion. Guide Rail Sweep may be a bit harder to set up but the geometry is more predictable.

Many thanks!

[Anonymous]

I used a combination of Loft and Sweep and reduced the number of sections I used and i was able to get the desired results.

Thanks