Hexy’s legs curl up like a ‘dead spider’

This is a sure sign of an under-powered Hexy. The most common causes for this are:
  1. Using non-high-capacity batteries
  2. Using low discharge-rate batteries
  3. Using batteries that aren’t fully charged

For a more detailed guide on how to properly power Hexy, follow this in-depth guide:
http://arcbotics.com/lessons/powering-hexy/