Worm Gear Assembly Not Interacting
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[/img]WoodGear1dtemp.skp
Hi,I think I've missed something fundamental. I've built a model of wooden worm gear assembly. The worm has an attached motor and the worm gear has a hinge. Both of them turn on the correct axes and the worm works with the motor correctly. However, when I run the simulation, the worm passes through the gear teeth as if they weren't there. The two joints are connected gear-to-gear.
I'd appreciate any help I can get.
Tom -
Nice design. I think the screw needs to be assembled by a bunch of small incremental inits made up of convexhulls and then bound to the base crank cylinder.
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Thanks, MPTAK,
I'll give that a try this afternoon. I've already done this with the gear after reading this: http://support.ponoko.com/entries/21249896-Gears-and-Joints-with-SketchUp-Sketchy-Physics.
I can't take credit for the design, I'm afraid. I saw this photo on Wikipedia:
http://en.wikipedia.org/wiki/File:CNAM-IMG_0602.jpgTom
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WoodGear1c.skpOK, I've made both the worm and gear into collections of individual components each of which is configured as "convexhull". When I run the simulation, they now seem to interact but not as gears. The worm shaft turns as expected, but the gear just nudges down a fraction and doesn't turn on its axis.
By the way, here's a picture of the original and the model:
And here's the model as it stands now:WoodGear1c.skp
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Cool beans! I'm glad to see that others are struggling with all this and sticking with Sketchy Physics.
I'm by far not an expert but have picked up a thing or two. Your model looks great but I fear that the base cylinder around which your screw is attached may not be being read as a cylinder. It tends to cease a bit on me and I would guess that the large wheel is correctly modeled. Once I get it spinning I'll try to do some of the movie capture I have been playing with and share it back to you. Mr. K provides a great script to enable good capture.
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@mptak said:
Cool beans! I'm glad to see that others are struggling with all this and sticking with Sketchy Physics.
I'm by far not an expert but have picked up a thing or two. Your model looks great but I fear that the base cylinder around which your screw is attached may not be being read as a cylinder. It tends to cease a bit on me and I would guess that the large wheel is correctly modeled. Once I get it spinning I'll try to do some of the movie capture I have been playing with and share it back to you. Mr. K provides a great script to enable good capture.
I'll look forward to it!!
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