Object floats away from hinge!

tachyon

Hi, all. I am working on my first animation and I am running into some problems.

I am modeling the gear mechanism in an ice-scream scooper.
For whatever reason I could attach the first one of the hinges in my model (the one on the rack) and it animates fine. The rack goes around the hinge as expected.
However, when I try to add the hinge on the pinion (small gear) and animate, I get both pieces slowly hovering away from each other and then stopping and none of the hinges work. If I delete the pinion gear hinge everything works fine again.

I have attached the file I am working on with both hinges.

Thanks!

The objects float away from each other when animated?!

Wacov

Basic mistake; sketchyphysics isn't that clever. The physics shape will normally be different to the actual geometry of the model, and in this example, by leaving their shapes as 'default', the physics shapes are the bounding boxes. When you right-click an object, you can see options for the shape; there are various shapes available for use, and by using groups of grouped, shaped objects like these, with the overall group set to 'default', you can achieve the results you want.

MrPlanet

You simply need to group different groups to get the result you want. Tiring and troublesome, but i bet it will come out great.