How to control the moving speed and moving distance of this robot?

I’m using the 3WD Compact Omni-Directional Arduino Compatible Mobile Robot, whose link is shown below.

I’m wondering how to control the moving speed and distance? Thanks.

Hello @Binbin and welcome to the forum,

You can find the product manual on the Useful Links ZIP files. Check the manuals page 25 for motor control, 37 for PID control, 38 for servo control, and 78 for Omni3WD Class Reference (you can find some sample codes here as well).