How can I apply two different rotations to the same Blender object? -

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i'm trying build object multiple gears. 1 of gears attached larger gear, when larger gear rotates smaller gear moves too, around center of larger gear.

simultaneously, smaller gear rotating - rotation around own center, independent of larger gear.

so:

  1. larger gear rotates around center
  2. smaller gear moves around center of larger gear rotation
  3. smaller gear rotating independently

i can 1 , 2 animating larger gear's rotation , grouping both gears, can't figure out how smaller gear rotate around own axis it's going around larger gear.

any ideas appreciated.

the key parenting.

  • create first gear , rotating.
  • create second gear next , animate one.
  • select second gear shift select first gear , press ⎈ ctrlp , select object.

now first gear rotates, second follow it's rotation while keeping it's own rotation.

if want outer gear rotate opposite way inner gear can place empty @ same location inner gear , use copy rotation constraint , set invert have rotate opposite way, parent outer gear empty.

enter image description here

here's sample file http://blend-exchange.giantcowfilms.com/embedimage.png?bid=883


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