I am a SolidWorks novice and i cannot differentiate between lofted and boundary boss
I need to know the difference between them and when to use each one of them in a simple form please.
thanks in advance
I will assume that you read the help files concerning the two different types.
As simple as I can think to put it:
Needs at least two profiles which can be guided by guide curves, but does not need to have guide curves
Can double as a lofted boss.
Only need one profile but will need a guide curve to guide the single profile
Much more control capability
I always use lofts as a first attempt when I have multiple profiles (bosses and surfaces) as they are more straight forward and I have less stability issues with them. However, boundaries are certainly nice as well and you have to use them for a single profile and guide curve and sometimes a boundary will generate where a loft will not.
I you have more specific questions, please let us know.
Thanks a lot I think I've understood the difference
In addition to Mike's information, the lofted features tend to emphasize the profiles direction more than guide curves direction when guide curves are used. The boundary features have the profiles and guide curves direction as an equal part of the surface created which results in a little different surface than a loft.
so that means if i want the guide curves to have more effect on the generated surface It's better to use the boundary feature.
thanks a lot for the help
Simply put think of loft vs. boundary kind of like this, I've read it on here from someone else before, don't remember who though.
If you have a bed sheet or a blanket, think of a large one that 2 adults fold together standing at opposite ends of the blanket. You tend to have some stretched areas and some wrinkled areas in a linear fashion between the 2 people. The 2 sides of the blanket to the sides are not touched by anyone and kind of do or follow the influence of the 2 adults. This is a loft or boundary surface with only profiles and no guide curves.
Now think of the above example but add guide curves, 2 people holding the sides of the blanket and pulling on it some or supporting it's weight. In a loft, these 2 new people are not as strong as the first 2 adults controlling the profile's direction. So the initial linear stretched area or wrinkles will still be present, but not as much as some weak people are pulling perpendicular to the profile's direction. This is a Loft.
Use the most recent Loft example above, but replace the guide curve weak people with adults equally as strong as the first 2 adults controlling the profiles direction. Not you have an equal pull or influence in all directions. This is a boundary feature or surface. Depending on your design intent or things influencing this surface, your surface might not react equally in all directions, but does more so than a loft would using the same criteria.
A loft can give a better looking or flowing surface in one direction, and in the other perpendicular type direction sometimes a not so desired outcome is generated. Take your existing sketches and create a lofted surface and a boundary surface from them, then hide show them to compare some visual differences.
thank you so much
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