People are limited to sit still or stay on bed for long period of time after a major surgery. Lack of movement may cause Deep-Vein Thrombosis (DVT) that can progress to Pulmonary Embolism (PE) which can result in death. Assistant robots have been developed to help patients with their lower limb movement. The first generation robot has simple function to force foot movement. However, there are also disadvantages to its weight and size. Second generation robot has been developed to be much more compact which has great advantage in accessibility for the users. In this study, the performance of the new robot is tested and analyzed.