Robot with mecanum wheels: what wheels, motors, gear and encoder?
November 3, 2013
last year I built my first robot based on Rover 5 platform and controlled by Arduino. I used it as an R & D platform an stacked it with various sensors, boards and electronics. It finally weighed 2.5 kg. Too much for the Rover 5 engines (7.2V DC / load current <160 mA / gearbox ratio: 86.8:1 / speed: 1 km/hr). The thing became annoying slow ;-).
Now I'm considering to make a second robot. One with mecanum wheels and heavier engines. The robot must not make too much noise. Should be relatively fast (+/- 5 km/hr) and should easily be able to accelerate. I expect that the robot will weigh about 3 kg.
I was inspired by http://www.microrobo.com/4wd-mecanum-wheel-mobile-arduino-robotics-car-c011.html and consider buying the following components:
- Wheels: http://nodna.de/Mecanum-Wheels-fuer-Lego-4-pcs
- Mounting hub: http://nodna.de/Nexusrobot-Aluminium-Universal-Hub-4mm
- Motor: http://www.microrobo.com/DC-Motor-M002.html
What do you think of this combination? What can you advise me? I am most uncertain about the engines. Proper power, gearbox and encoder chosen?
Ko van Schaik
The Hague, the Netherlands