How to model a t2.5 timing belt?

I´m modeling a reprap 3d printer, and my problem is how i make the timing belt along a path, to push one element back and forward on a linear rail, and have the belt itself be controlled by a pulley.

Please see the image attached to get the idea.

Any help will be much appreciated.

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Step One: Draw one link of the belt and use "Linear Sketch Pattern" to create the length you need. NOTE: but the length in half, as the part will be mirrored at the end to produce full length.

Step Two: Extrude to the width of the belt 4, 6, or 10mm

Step Three: Use the "Flex" feature to bend the belt 180 and set radius of bend.

Step four: Mirror part to complete.

 
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