ISDX Problem

[jeakes]

I am trying to get the hang of using ISDX, but when it comes to making some things I am not getting it. For instance, if it takes 4 edges to make a surface, how do you go about making a round dimple or round bump (like half a sphere). I am sure that it is an easy task im just not finding or realizing the right way to go about it. If someone could fill me in that would be wonderfull.

Thanks in advance.

 

[design-engine]

Well there are a bunch of possibilities. Can you web browse for an image online that shows what your talking about more specifically.

 

[keyur soni]

dear jeakes use revolve command instead of going in ISDX style.

 

[jeakes]

Here is an example of what I am talking about. A surface that has spherical dimples in it.



The reason that I need them to be a ISDX surface,instead of a revolve is so I can later on do a still frame animation of one of the dimples going from a almost flat surface to a concave surface like pushing a button. Another example would be like this lid that has the bumps that you can push down for different types.



I hope this explains it better, and that there is a way to make these bumps in ISDX. Thanks

 

[muadib3d]

hm, correct me if I am wrong, but it looks to me like killing a mosqito with desert eagle.

Isn`t easier achieved this by using spline created in sketcher instead?

 

[jeakes]

muadib3d - would that work in a 3-Dimensional form? For instance this very simple representation of a flat disc with a bump on it.



Then I would need the bump to appear as if a finger was pushing the bump and it would start to push down and have the same effect of you pushing one of the bumps on the lid above and it getting pushed to the other side. Hope this helps. Thanks again for any help.

 

[kdem]

If you're still trying to use the style feature here are some pictures that may give you some ideas on how to approach yuor modeling.

 

[dgs]

Boy, I'd love to see the steps used to create that.

 

[kdem]

This is the construction geometry I used to create the quater section of the surface.

 

[dgs]

Are all those curves ISDX curves? It looks like, based on your model tree, that they are just sketched curves.


Which curve came first?


How are they constrained? In other words, what drives what?


The whole make a 4 sided patch across two 3 sided patches thing still confuses me. I get it in theory, but how to build it robustly is another thing all together.

 

[kdem]

The model is by no means robust. I really had not gotten that far. This was really just a starting point. All the curves are sketched curves and the surfaces were created as style surfaces. As far as creating a four sided patch across the three sided patch, this was more of a response to how you could break up the three sided areas into four sided areas.


The first curve was the base circle on the TOP datum plane. The second curve is a spline curve that is attached to the base circle and has a height dimension along with some other dimensioned points. The third curve is attached to the base circle and its center point is attached to the center point of the second curve and is the same as curve two.I offset a datum plane from the TOP datum and created four datum points at the intersections of curves two and three with DTM1 and created a curve on DTM1 through the points using the ellipse option. These curves, so far, areupdating as expected (second picture shows chages in height of curve two and diameter of base circle). Curve five is the same as two and three, however, right now it is not updating with changes made to the height of curve two and the base circle diameter. I offset datum planes from the FRONT and SIDE planes and created points at the intersections of curves two, three,five, and the base circle with the planes DTM3 and DTM4. Curves six and seven were created through the points and seem to be updating (picture three shows how the curves are updating: curve five (red) is not updating). I can make changes to the offset dimensions for DTM1, DTM3, and DTM4 (DTM3 and DTM4 offsets need to be changed together: picture four shows the changes). Five surfaces were created in the style feature (picture five shows the surfaces created).

 

[dgs]

Ah, I get it.


The problem I've had in the past with creating things like this is that, though you can create curvature continuous in ISDX, that doesnt make it smooth. The nature of the multiple curves means that you can create slight undulations that are technically curve continuous but not what you want at all.


My regular Pro|E surfacing experience tells me that fewer curves are better for achieving a nice smooth surface, if you can get away with it. In ISDX I seem to frequently find myself pushed to adding curves to get the surface right but then getting into this never ending tweaking of the curves to smooth all the undulations out.


Thanks