Travelapse

Following the directions from my images, it should be pretty straight forward to make your own motorized dolly.

But remember this requires a few more tricks than just 3D printing:

Buying parts online, most of them on ebay
Getting small fasteners
Machining pulleys to fit bearings
Soldering cables to motor

Luckily, everything is explained!

Here is everything you will need to get to succeed.

STL Files available here as well as a pdf file with hyperlinks.
http://www.thingiverse.com/thing:1637416

You will need to build 2 clamps.

Build your carriage.

Assemble the motor and its gears.

Here are more details to help you to succeed.

* Belt length is 1990mm *

Go try it!

I used :

Magic Lantern on my EOS 7D for setting time-lapse
LR Timelapse & Lightroom for editing
After-Effect to render the video (sometimes I used a warp stabilization at 1 or 2% because of the wind..)

Good luck'