Mark,Mark Biasotti wrote:
...The blue curve in the video is a "composite curve" and it is created using a projection of 2ea. 2D sketches.
And is available in SW too! Under Window: Viewport.Kevin Quigley wrote:
This is not that easy to be honest and is one situation where a 4 viewport window helps (so you see the spline in top, front and end view as you draw it). This is the way Rhino does it for example (and Alias and most surfacing only apps).
hi guys, i am new here.
i do not know whether it is better to start a new thread or dig up this old one, so I am doing the latter one as maybe people that were involved will be albe to help.
I am trying to bend in 3rd dimension my sketch using an elipse as a secondary sketch. I am using Insert->Curve-> Curve-Projected feature and most of outcoming 3d curve is correct except the fact that in a certain moment the direction of bending in 3rd dimension is changed (opposite).
What I am doing wrong? I tried to move both sketech around but nothing helps.
Hi Steve,
Answer:
Your curves are not lined up on the extremity where they past through the vertical and "back onto themselves".
Your curves "back onto themselves" - Solidworks would have to guess which section goes with which.
You can align the extremity and split the sketches at that point to create two separate curves.
Tim
As a side note: If you want a good surface you must start with a great curves. To get great curves you must start with excellent sketches. I hope that this file was just an example...
thanks for your replies guys. Meanwhile reading the forum, i tried to split my curve and the elipse in order to create two 3d splines. Still, I am experiencing result mismatch with my predicted expectation of what I think I should achieve.
I tried to create a 3D curve and model it to the desired shape but unfortunately, that did not work. I mean, maybe with a lot more experience and time, I would be able to achieve that, but being in my position now, that is impossible.
Projected curves are often difficult to work with, you can not easily predict that two good looking curves in 2d will project into a nice 3d curve. Often the 3d curve is wobbly and uncontrolled, and it can be hell to adjust your two 2d curves to get a nice, clean projection.
A 3d sketch spline often does a better job, just line it up with your reference curves by eye and then look in 3d and try to work out any lumps and bumps. It should have a nice planar characteristic from some view in 3d.
http://dezignstuff.com/blog/?p=141
http://dezignstuff.com/blog/?p=79
http://dezignstuff.com/blog/?p=171
The second one has the projected curve feature you are looking for.