J’ai donc soumis mon problème à myrobotlab.org qui n’a pas tardé à me répondre. Voici la réponse :

” Hi
There was a problem with MRLComm in version 1943. It has been corrected in version 1944. If you want to use the servo at full speed use setVelocity(-1)

If you want it to move slow, use setVelocity(<speed in degrees/s>)
For example setVelocity(10)”