It takes a lot of metal to make a 3/4 ton robot. This is the story of that metal.
Groundhog's existance started with the cannabilzation of another robot to get a chassis.Chassis-in-a-Day
Ironmongering, welding, grinding, and a little gentle persuassion beat Groundhog's chassis into something close to its present state.Electric Groundhog
Once the chassis was in shape, the drive train and steering are connected, and Groundhog becomes self propelled.Hydraulic Groundhog
The retrofit to hydraulics was a long and painful process, but in the end it paid off.Finishing Touches
Sensor mountings, chain tensioners, different gear ratios, and the removal of a very stubborn bearing mount occur as Groundhog takes its present form.