Abstract
We are developing Tree Felling Robot with Chain Saw. In this paper, we show the requirements and specification of the robot. In our country, the chain saws are commonly used to fell a tree because forests cover on the steep ground and mountain. Therefore, we are developing the tree felling robot with chain saw. First, the requirements are shown. To fall the tree to the specific direction, the face cut (notch cut) must be made on the side of the direction. Next, the pre-experiment to lead the joint loads on the robots is described in detail. Finally, the robot we developed is shown.