The European Higher Education Area (EHEA) has leaded to a change in the way the subjects are taught. One of the more important aspects of the EHEA is to support the autonomous study of the student. Taking into account this new approach, the virtual laboratory of the subject Mechanisms of the Aeronautical studies at the Technical University of Madrid is being moved to an on-line scheme.
This virtual laboratory consist on two practices: the design of cam and follower mechanisms and the design of trains of gears. Both practices are software applications that, in the current situation need to be installed on each computer and the students carry out the practice at the computer classroom of the school under the supervision of a teacher.

During this year the design of cam and follower mechanisms practice has been moved to a web application using Java and the Google Development Toolkit. In this practice the student has to design and study the running of a cam to perform a specific displacement diagram with a selected follower taking into account that the mechanism must be able to work properly at high speed regime. The practice has maintained its objectives in the new platform but to take advantage of the new methodology and try to avoid its inconveniences some changes has been made. Once the new practice has been ready, a pilot study has been carried out to compare both approaches: on-line and in-lab.

This paper shows the adaptation of the cam and follower practice to an on-line methodology. Both practices are described and the changes that has been done to the initial one are shown. They are compared and the weak and strong points of each one are analyzed. Finally we explain the pilot study carried out, the students impression and the results obtained.

Keywords: On-line laboratory, mechanisms, mechanics, virtual laboratory, EHEA.