The use of automation and robotics technologies for care-giving and assistance has become a very interesting research topic in the last years. In this scenario, the researchers at Politecnico di Torino are working on Paquitop.arm, a mobile robot for assistive tasks, composed of an omnidirectional mobile platform, a 6 DOF robot arm, and a depth camera. Task-oriented considerations are made to estimate a set of mounting parameters which represents a trade-off between the exploitation of the robot arm workspace and the compactness of the entire system. A typical task is described to clarify the use of the robot in real application