Scalar Tardis
SL Scientist/Engineer
Join date: 5 Nov 2005
Posts: 249
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01-21-2006 13:41
I'm not sure what the correct name is for this gear design, but the driven gear looks like the old German Cross on warplanes. For every rotation of the Drive gear, the Driven gear turns 1/4 rotation, and is locked in position while the Drive gear finishes its cycle. Drive gear rotates 90 degrees and Driven gear rotates 1/4 turn:  Drive gear rotates 270 degrees while Driven gear is locked in position:  This is all done exclusively using physics and those evil, evil hinge joints.  Next question, how do I keep reapplying a steady, even torque to the drive gear? Though this works, the arcs don't like being near each other, and rub a great deal.
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Davan Camus
Registered User
Join date: 13 Sep 2005
Posts: 67
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01-21-2006 14:10
Um... That's really cool.  ...any future plans for it?
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Visit Cubes at Alice 100,18. -------------------------------------------------- Davan Camus, born: 2005 September 8 Out-world location: Santa Cruz, CA UI Proposal: http://davancamus.hexaflexagon.com/blog/?p=39
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Lightwave Valkyrie
Registered User
Join date: 30 Jan 2004
Posts: 666
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01-21-2006 18:14
make them glass, glass slides nice, and turn off collision sprites and sounds -LW
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Jonathan Morris
Registered User
Join date: 5 Jan 2006
Posts: 66
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drive type
01-22-2006 01:29
The gear you are making is often called a " Geniva drive " ( spelling ? )
Can you give me a location to see your work ?
Regards Jonathan Morris
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Ben Bacon
Registered User
Join date: 14 Jul 2005
Posts: 809
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01-22-2006 03:43
Great work, Scalar - You are rapidly becoming the king of SL physics. Thanks for the name, Jon - helped me to find WikiPedia: Geneva Drive for anone interested.
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Troy Vogel
Marginal Prof. of ZOMG!
Join date: 16 Aug 2004
Posts: 478
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so very cool
01-23-2006 12:50
I had no idea we could do stuff like this with physics. Excuse my ignorance but all I have done with physics so far has been creating objects in the sky and watching them fall. I know, it sounds sad but I am more an architect in SL and less of a programmer. -- the Opposite of RL.  Thanks for sharing your project, Troy Vogel
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Scalar Tardis
SL Scientist/Engineer
Join date: 5 Nov 2005
Posts: 249
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01-23-2006 13:26
From: Jonathan Morris Can you give me a location to see your work ?
Well, although I have group-shared land, I don't use it because most of this stuff is HUGE and godawful ugly, with all default Ikea-wood texturing. I'm more an engineer than an artist, so it's like visiting a metalshop... not exactly visually appealing. Everything I'm doing is in sandboxes for now, so at least if something breaks I don't annoy 500 neighbors on the same residential sim, who may be picking lost gears and ball bearings out of their fountains for weeks. 
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