This paper is verified movements of a new experimental system using an omnidirectional treadmill mechanism. We have developed a robot for small insects such as Camponotus. The robot is named as ANTAM (ANT Activates Machine), and configured to perform as cockpit for insects. However, this robot has a problem which is strong vibration of the mechanism during movements. The vibration is serious problem for small terrestrial insects which is meaning of predator stimulus. The robot is able to adapt to various small insects by reducing these vibrations. We achieved the improvement of motion compensation device. In addition, we have succeeded a measuring of the ants (Camponotus) walking trajectory. We consider that this mechanism drives ethology strongly.