Download all the STL files, then import them to your slicing software.By the way, the slicing software I used is Cura 15.04.

Transform the STL files into Gcode files, then you can use them to print all the parts.

As what I had said in the log, that will cost you a lot of time. So, enjoy it!

You still need some necessary parts except the 3d printing parts. Please refer to Components.

The other necessary parts you need to assemble a Mecanum Wheel are shown in the figure below.

This step is a great test of skill.

As shown below, you should fix the iron axis one by one. Take it easy！

The silica gel heat shrinkable tube is sleeved outside the roll, and then the roll is assembled on the iron axle.

Then tighten the screws and nuts from both sides of the wheel.

Done!