MicroFOBO requires at least 8 servo motors to walk. The servos are placed at the hip, upper leg, lower leg and ankle. 

First we met with the previous MicroFobo team and asked which servo they used and what results they achieved. The servo they used was the plastic gear SG90 micro servo. Sadly, they were unable to make MicroFobo walk. However, when Fobo was lifted and did not have the load of all the parts, Fobo would appear to make a walking motion. They also added that the team had to constantly replace their SG90s because the plastic gear would strip when placed under load. Our team proceeded to investigate the MG90 which is similar to the SG90 in size but instead of a plastic gear it has a metal gear. Looking further into the specifications and with some unit manipulation we determined the rpm and power outputted by the MG ranged from 100-125 rpm and 2.2-3.3 watts. When compared to the SG90 it would only provide 67-84 rpm and 1.1-1.5 watts. Since Fobo expected to be able to traverse terrain similar to Mars a wider variety of power should be desired. Looking further into the MG vs SG servos the team was able to find a video on YouTube which showed how the servos worked when operated at the same time. From the video we can see the SG has more of a loose/weak motion when moving which could be from the plastic gear inside. When looking at the movement of the MG it moves with more precision and has no signs of loose movement. Combining the precise movement with the amount of power being outputted we could assume fobos movement would be most optimal with the MG.