  Moving a module in a modular robot is a very complex and error-prone process.
Unlike in swarm, in the modular robots we are targeting, the moving module must
keep the connection to, at least, one other module. In order to miniaturize
each module to few millimeters, we have proposed a design which is using
electrostatic actuator. However, this movement is composed of several
attachment, detachment creating the movement and each small step can fail
causing a module to break the connection. The idea developed in this paper
consists in creating a new kind of deformable module allowing a movement which
keeps the connection between the moving and the fixed modules. We detail the
geometry and the practical constraints during the conception of this new
module. We then validate the possibility of movement for a module in an
existing configuration. This implies the cooperation of some of the modules
placed along the path and we show in simulation that it exists a motion process
to reach every free positions of the surface for a given configuration.
