Introduction; Principle of the inkjet; Mechanical layout inkjet printer; Design aspects of the carriage; Self-positioning; Thermal design; Design phase; Conclusion; Topics for discussion and self-study; Mechanical optimisation of a RF coupling system for a medical Linac by means of FMEA; Summary; Hadron therapy; ADAM's technological innovations; Failure Modes and Effects Analysis (FMEA) and Failure Modes, Effects and Criticality Analysis (FMECA); Case analysis: Mechanical optimisation of a RF coupling system for a medical Linac through FMEA