Transitional constraint going bad

[WHolzwarth]

Lots of work are left in Inventor's modeling, Studio animations, DS, constraining, surface stitching, 3D curve combining into complete runs. Personally I'd prefer that much more than Home screen gimmicks and rendering improvements.

See sample. I've tried to move the Nautilus gears (invisible), but their surface for transitional constraint is divided into separate regions. No way for combining them into a single surface.

After that I built the surfaces separately (Nautiluskurve.ipt). I could constrain them with a transitional constraint, but this is permanently going bad at random positions.

Normally this could be a task for DS. But I found no way for introducing an appropriate DS joint.

So far I could go. What now? Thanks for hints.

Walter

Later: In DS, applying a 3D contact helped. But an error message occurred, when I tried to add a 180° back-and-forth rotation

[johnsonshiue]

Walter,

This is a very interesting example. I suspect there might be multiple issues here. The original transition faces (imported surface) are not ideal. There are G0 edges. The newly created surface is much better in terms of tangent continuity but the surface seems quite complicated.

I tried a simple example using equation driven curve and the motion seems to be more stable. Could you try it with EDC?

Thanks!

[WHolzwarth]

Tried it, Johnson, and no luck. Equation curve syntax needs improvement for this special case. See picture.

If exponent is an integer, then there's no problem. But the equation doesn't expect a changing exponent like t.

Good catch, Johnson.

Walter

P.S. That's the situation with 2014. I didn't try it with 2015

[johnsonshiue]

Hi! Indeed, currently EDC does not support power as a variable. This looks like a limitation. I cannot think of a way to bypass the limitation except using imported points.

Thanks!