LDCad Forming a rubber band


Forming a rubber band
#1
Hi all,

Can someone help me with forming a rubber band like this?

.png   assembly.png (Size: 138.62 KB / Downloads: 43)

.png   rubberband.png (Size: 84.71 KB / Downloads: 41)

Drawn by hand
   

LDraw file attached.

Thanks.


Attached Files
.ldr   rubberband.ldr (Size: 42.49 KB / Downloads: 2)
Jaco van der Molen
lpub.binarybricks.nl
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RE: Forming a rubber band
#2
(2021-03-16, 20:57)Jaco van der Molen Wrote: Can someone help me with forming a rubber band like this?

You need to use a counter clockwise control point to push the lowest part up.

Like so
   

I also changed the skins segment base size from 400% to 200% to make the smaller circles more round.
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RE: Forming a rubber band
#3
(2021-03-16, 21:07)Roland Melkert Wrote: You need to use a counter clockwise control point to push the lowest part up.

Like so


I also changed the skins segment base size from 400% to 200% to make the smaller circles more round.

Ah yes, found it. I am getting nice results with a lot of trial and error.

There is way more to it than I thought and there are many more possibilities to form flexible parts I see.

This is rather complicated and not all options are easy to understand. I guess neither is the way to explain all this.

Thanks, Roland!
Jaco van der Molen
lpub.binarybricks.nl
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RE: Forming a rubber band
#4
(2021-03-17, 8:48)Jaco van der Molen Wrote: Ah yes, found it. I am getting nice results with a lot of trial and error.

There is way more to it than I thought and there are many more possibilities to form flexible parts I see.

This is rather complicated and not all options are easy to understand. I guess neither is the way to explain all this.

Thanks, Roland!

This is what I made of it now.

.png   RUBBERBAND.png (Size: 294.1 KB / Downloads: 27)


Attached Files
.ldr   rubberband.ldr (Size: 357.42 KB / Downloads: 0)
Jaco van der Molen
lpub.binarybricks.nl
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RE: Forming a rubber band
#5
(2021-03-17, 9:37)Jaco van der Molen Wrote: This is what I made of it now.

I think it can be made more natural looking with a flat top, as I did here, using a control point for each beam 2L


Attached Files
.mpd   rubberband.mpd (Size: 144.61 KB / Downloads: 3)
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RE: Forming a rubber band
#6
(2021-03-17, 10:50)Philippe Hurbain Wrote: I think it can be made more natural looking with a flat top, as I did here, using a control point for each beam 2L

Yes, that is what I was looking for.
Since I have not yet built the physical model, I guessed it should look more like this, but could not get it right.
Thank you!
Jaco van der Molen
lpub.binarybricks.nl
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