Hello,
I have been trying to get a solid loft to work that uses four section sketches and about a dozen guide curves, but have been finding it problematic. All the section sketches are closed and all the guide curves intersect the section sketches.
The feature I am trying to loft is symmetrical so there are several mirrored guide curve pairs.
I am finding that getting a loft to work in SW cn be quirky and is a bit of a hit n' miss kind of process that can lead you up the garden path.
eg. You select all your four section sketches and arrange them in the right order. Sometimes SW shows a succesful loft preview without even selecting any guide curves. So you now select your guide curves and as you do, SW can jump from showing you a successful loft preview to not showing any and giving you the "Loft operation failed to complete" error. This can occur as you select/deselct each guide curve.
It seems like only some combinations of guide curves result in a successful loft. Strangely, I have found that there are cases where if I select both guide curves of a mirrored set, SW will fail to complete the loft, whereas if I just select one, it will successfully complete the loft, albiet not in a way I want it to.
To try and avoid this, I have even tried lofting just one half of the feature, using one half of the sections skecthes and just one of the guide curves from each mirrored pair. Even here I run into problems with the same error "Loft operation failed to complete".
These light blue connector dots/strings that appear are also a bit of a mystery. I don't understand how SW decides where to place them (by default they always seemt to be very wrong) or how many it decides to use, or even which blue conenctoir dot string it decides to show by default (right clicking on teh dot can "Show All"). Sometimes these conenctor dots can be dragged freely along a line segement but other times they can only be shifted from discrete positions at each vertice in a profile sketch, which is frustrating in itself, especially when adjacent section sketches don't share the same number of vertices. I don't understand whats runnign the show there.
What advice can you give on getting these lofts to work the way you want them to?
Are there a set of firesafe rules for creating profiles and guide curves to ensure a successful loft? eg. symetrical parts should always have a vertice on the sketch coincident with the plane symmetry and a guide curve running along it, or if you use enough guide curves, the loft will eventually work etc
Regards
Bullman