Let's Make Robots!

Arduino motors

identical motors, different speed

Hi all, I have 6 identical motors, or so I thought until I powered them all on at the same time for the first time and realised they all spin at different speeds.


Has anyone else observed similar behaviour either when using multiple identical motors, and/or when using the Arduino Motor Shield?  


I am using the Arduino Ethernet + Motor Shield rev3, with 3 motors connected in parallel to Channel A and 3 motors connected in parallel to Channel B. Each motor is connected to a wheel.

navigate using IR sensors
Using a
Ok this is my second arduino robot thats currently in very early development, i thought i'd drop a few picks to show how its going. at the moment this is, … Read more