Voice Coil Motors are widely used for keyboard sensitivity testing. As a new type of direct-drive motor, Voice Coil Motor is gradually penetrating all walks of life, such as semiconductor field, medical field, aviation field, valve field and so on. 

     And, at the moment, the small series is the clacking of the keyboard, its production process also used in the voice coil motor. It is well known that most products are packed and shipped before the relevant tests, such as air tightness test, sensitivity test, fatigue test and so on. The keyboard before shipping, but also need to test the sensitivity of its buttons, and Voice Coil Motor is in the button sensitivity test application. 

    The test process and principle are as follows: 1, from a test initial bit to B button surface bit: position mode + speed mode, from a high-speed to B, while recording B's position, and save in Register A. 2, from the B key surface to the C key conduction position: speed mode operation, while monitoring the actuator current size, once found that the current tends to be small, record the position of the point, that is, c key conduction position, and save in Register B. 3, from the C key to the bottom of the D key: continue to use the speed mode, while monitoring the position error, when the position error reached a set value, record the position of the point, that is, the bottom of the D key. 4, Register A, B difference, used to judge the quality of the key. 5. Output the signal, giving "YES" or "NO" . 

     Kunshan has been working in the field of voice coil motor for more than 10 years. There are many practical applications of the voice coil motor in various testing instruments, fast speed and other features by the testing equipment manufacturers trust. 

       The article was originally written by www.tmmotion.com in Kunshan, China. Please quote the source.