Page 238 - Robot Builders Source Book - Gordon McComb
P. 238

226                          Transporting Devices

         Exercise 6E-1


            The vibrotransporting tray shown in Figure 6E-1 carries a mass m. The flat springs
         are inclined at an angle a = 10° to the vertical. The coefficient of friction between the
         tray and the mass is // = 0.2. Calculate the minimum amplitude of vibrations of the tray
         that will cause movement of the mass m if the vibration frequency is 50 Hz or
         314 rad/sec; calculate the minimal frequency of vibrations if the vibrational ampli-
         tude a is about a = 0.01 mm that will cause movement of the mass m. Assume the vibra-
        tions are harmonic.













                                                  FIGURE 6E-1.











































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