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Bending a twist... Moebius (#4429)
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Thor  
#1 Posted : Wednesday, July 18, 2012 10:30:50 AM(UTC)
Thor

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Hi - So I have searched for this - and can't seem to figure it out, so I am asking for help.

I am trying to make a Moebius strip, very simple really, but not...

So, I take a strip, flat but with some thickness, I twist it 180 degrees down the center - so far, so good.
Now I want the ends to meet, so I bend it 360 on the side and my headache starts...
Also tried bending to a line, both a circle and an arc - no luck.

[ATTACH]4464[/ATTACH]

[ATTACH]4465[/ATTACH]

Any thoughts? I'm stuck here.

Ok, this is the best I have gotten - ends do not meet, the look is good - but closed would be better... :-)

[ATTACH]4466[/ATTACH]
File Attachment(s):
moebius work Twist.vcp (40kb) downloaded 5 time(s).
moebius work 2.vcp (83kb) downloaded 5 time(s).
moebius work Twist and Bend.vcp (81kb) downloaded 5 time(s).

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rockyroad_us  
#2 Posted : Wednesday, July 18, 2012 3:22:55 PM(UTC)
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You need the advanced feature bend along curve.
rockyroad_us attached the following image(s):
moebius.jpg (26kb) downloaded 5 time(s).

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blowlamp  
#3 Posted : Wednesday, July 18, 2012 4:28:46 PM(UTC)
blowlamp

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Here's a video of a quick way to do one that should also work with more complicated paths.

http://screencast.com/t/kf3bj4V3Da0


Martin.
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billbedford  
#4 Posted : Thursday, July 19, 2012 2:22:51 AM(UTC)
billbedford

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Even simpler would be to start with a circle and use a one rail sweep solid with a 360 deg twist.
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blowlamp  
#5 Posted : Thursday, July 19, 2012 3:35:25 AM(UTC)
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Agreed, Bill.

I'm not sure why I made it so long-winded, I didn't even need to rotate the polygon about the Y axis for the purpose of the demo - must've been a mental block :)



Martin.
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rockyroad_us  
#6 Posted : Thursday, July 19, 2012 7:20:01 AM(UTC)
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Good call bill.

I forgot about the twist on the one guide rail.
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Thor  
#7 Posted : Thursday, July 19, 2012 8:56:00 AM(UTC)
Thor

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Martin, that is brilliant. And you got the degrees right, a 360 twist would not make it moebius...
Thanks, that is a completely different approach than mine, and far better.
Learning stuff.
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gibbo_gt40  
#8 Posted : Friday, July 20, 2012 9:03:38 AM(UTC)
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Originally Posted by: billbedford Go to Quoted Post
Even simpler would be to start with a circle and use a one rail sweep solid with a 360 deg twist.


One sentence and I learnt so much, the single rail tool and the gripper.

Thanks
File Attachment(s):
twisted_hexagon.vc3 (37kb) downloaded 7 time(s).

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