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Consumer Products Surfacing Tutorial
Not the same one, but here are a few:
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. -
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Consumer Products Surfacing Tutorial
Matt:
Thanks for the links. Those are not them but they will still be very helpful.
Richard: That link is it. I have watched it something like 5 times now and still cannot understand what the person teaching is doing in the second section. Right at the end of the first section they make a composite curve out of two sketches. He then does a couple quick convert entities, creates a sketch with an ellipse, makes some pierce relationships and sweeps. I am stuck on the steps where he converts entities. What is he converting and how is he using the converted entities?
The whole technique seems to use two sketches at 90 degree angles and create a shape that makes sense from those two sketches. Done anybody have any tips or ideas there?-
Consumer Products Surfacing Tutorial
Eric,
I'm the author of those videos (I believe done on SW2007). The blue curve in the video is a "projected curve" and it is created using a projection of 2ea. 2D sketches. This can be accomplished by creating two sketch in two oppositing planes, in the case of the razor, the right plane and the top plane, and then goin gto insert>curve>projected and picking the two sketches. The result is a 3D curve that projects each of the 2D sketch curves into 3D space normal to their work planes and calculates the intersection.
Here is the model of the razor if you'd like to have a look: Click here-
Consumer Products Surfacing Tutorial
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.
Don't you mean a "projected curve"?
Eric,
What you are looking for is the Projected Curve. The watering can tutorial explains this.
You just draw what the 3D curve should look like from two different directions. It's like the reverse of a drawing where you make projected 2D views from a 3D element. With a Projected Curve you create the 3D curve from orthogonal 2D views. Lots of people get hung up on this feature. It's very useful once you master it. -
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Re: Consumer Products Surfacing Tutorial
Mark,
Your video is very good aid to a learn surfacing & its possibilities. Thanks for sharing these. I am unable to download the SW file. The link has expired. Can you please repost. Thanks
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Re: Consumer Products Surfacing Tutorial
Thank you so much. Also want to give you props for your form development and curve creation. very nice work on any model i see that you have done.
Chevis W.
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Consumer Products Surfacing Tutorial
If you struggle with understanding this technique just create two extruded surfaces from the two sketches. The projected curve is the intersection curve of these two surfaces.
It is a useful technique but doing this can create a lot of extra points on the resultant spline. The only way to avoid this is to get to grips with 3D sketches and draw the splines directly in 3D space. 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).
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Consumer Products Surfacing Tutorial
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).
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Consumer Products Surfacing Tutorial
Good point Mark,
The 4 port view works well because SW will respect the view and move spline points and even the widgets in only two axis of motion (ignoring the 3rd that is normal to the screen. This is a great way to control the shape of your 3D sketch spline. Warning thou - it only works in one of the default orthogonal views - i.e. front, top, side etc.
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Consumer Products Surfacing Tutorial
Yes forgot to say that the multiple viewport is available in SolidWorks as well.....so get practising those 3D splines
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Consumer Products Surfacing Tutorial
Eric, you might also like this one--it's not the razor, but the mouse, and uses some similar surface work:
http://www.productdesignforums...dex.php?showtopic=230
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Re: Consumer Products Surfacing Tutorial
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.
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Re: Consumer Products Surfacing Tutorial
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...
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Re: Consumer Products Surfacing Tutorial
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.
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Re: Consumer Products Surfacing Tutorial
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.
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Re: Consumer Products Surfacing Tutorial
Steve,
Next time, go ahead and start a new thread.
I have attached my technique I use when I want to define a 3D sketch with two intersecting 2D sketchs. I try to avoid the "curve" tools as much as possible.
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Nov 25, 2008 8:22 PM
