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actuators:erm [2022/03/21 20:42] – [Projects Using ERMs] jonathan.lane-smithactuators:erm [2022/03/21 21:01] – [Types of ERMs] jonathan.lane-smith
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-====== ERM Motors (still in progress) ======+====== ERM Motors ======
  
 ERM (Eccentric Rotating Mass) motors are a form of vibration motors that work by spinning an off-center mass. The radial forces that are generated from this movement cause the motor to oscillate back and forth, resulting in vibration. ERM motors are very affordable options for generating simple vibrations. ERM (Eccentric Rotating Mass) motors are a form of vibration motors that work by spinning an off-center mass. The radial forces that are generated from this movement cause the motor to oscillate back and forth, resulting in vibration. ERM motors are very affordable options for generating simple vibrations.
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 Shafted motors are ERM motors for which the eccentric mass is visible. When using shafted motors, it is important to ensure that nothing comes in contact with the eccentric mass while it is spinning. If this does occur, it could result in a large jerk instead of a smooth vibration, in addition to possibly damaging whatever came in contact with the eccentric mass. Shafted motors are ERM motors for which the eccentric mass is visible. When using shafted motors, it is important to ensure that nothing comes in contact with the eccentric mass while it is spinning. If this does occur, it could result in a large jerk instead of a smooth vibration, in addition to possibly damaging whatever came in contact with the eccentric mass.
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 +{{:actuators:erm1.png?300|}} ((https://www.digikey.ca/en/products/detail/vybronics-inc/VJP16-70E310/6009932))
  
 Encapsulated cylindrical motors are similar to shafted motors, but they cover the rotating shaft in order to prevent interference of outside objects with the eccentric mass. Encapsulated cylindrical motors are similar to shafted motors, but they cover the rotating shaft in order to prevent interference of outside objects with the eccentric mass.
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 +{{:actuators:erm2.png?300|}} ((https://www.digikey.ca/en/products/detail/vybronics-inc/VZ6DL2B0055211/6009925))
  
 Shaftless motors, also known as "coin" or "pancake" motors, are thin coin-shaped motors in which the eccentric mass is enclosed. Because these motors can be much smaller than the other shafted motors, they are often used for wearable haptic displays. Shaftless motors, also known as "coin" or "pancake" motors, are thin coin-shaped motors in which the eccentric mass is enclosed. Because these motors can be much smaller than the other shafted motors, they are often used for wearable haptic displays.
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 +{{:actuators:erm3.png?300|}} ((https://www.alibaba.com/product-detail/The-Worlds-Smallest-ERM-3V-DC_62437101728.html))
  
 ===== Advantages & Disadvantages ===== ===== Advantages & Disadvantages =====