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Since, the tilting motion need a very larger torque which is about 110Nm, and most of the motor in the market has only 0.2 ~ 0.5 Nm. Moreover, the desire tilting motion should be very slow which is about 5.5rpm while most of motor has a very high rotational speed: 2500 ~ 3000rpm. Therefore, a step-down device is needed.


A worm & wheel type gearbox can be used, because worm & wheel mechanism has a good motion locking function. Also, step-down ratio can be very high: 10 ~ 450.


After the calculation with the motor characteristic equations:


Torque = K0I

Speed ω = (ε - IRc )/Ro

§T = Iα



A DC 120W motor is the most suitable one.





A transmission device is needed to drive the machine by the motor, it is a metal couple.

Because the transmissible torque of the couple can be very high. Also the absorption of eccentricity and angularity is high. These advantages can reduce the vibration of the motor.



        The circuit parts are divided into three parts.


        Power Circuit:


        It is used to provide a 24V DC electricity to the system. Because the power source is 220V AC, so this circuit has a rectify mechanism and a step-down mechanism.








Motor Circuit:


        This circuit is directly supply the electricity to the motor. Because the current flow through the motor is large, in order to prevent the spark / burn of the switch, this circuit is a individual circuit and controlled by two relays.






Control Circuit:


        This circuit is used to control the motion of the motor, the electricity supply of the system. So it is a main circuit, if it’s down then all off.










         See the Simulation