![]() ![]() Also, some instruments deliberately send vibration through a material under test, measuring how the vibration signals propagate through the medium. This reduces the chances of false-negative readings within the instruments. Some seismometers and vibration monitoring sensors integrate our vibration motors to operate as part of their self-testing algorithms. Our solution was a brushless vibration motor with a precise speed controller set to the hopper resonant frequency.Ī more unusual use of our vibration motors is within instrumentation and material analysis markets. In one of their processes, they required pre-cut wires to be fed through the machine, and found that they needed to vibrate the wire hopper to reliably funnel the wiresets which were sticking. Our customer manufactures complex automatic wire crimping machines. Case study | vibrating hopper for automated wire crimping We offer a wide range of motors for this application, including super-long-life brushless vibration motors for constant operation. If you have powders, small items, wires, or other materials that are prone to getting stuck or won’t mix, try freeing them with a source of vibration. Vibration is used in industrial processes, vending machines and lab equipment to aid the movement of materials through a process.įor example, ice-cubes through the chute of a crusher, wires through the hopper of a wire crimping machine, or the mixing / emulsification of fluids and powders. We designed and manufactured a motor that could withstand these environmental challenges as well as deliver long-life, crisp, haptic feedback to the scanner handle. The scanner would regularly see very rapid temperature changes between ambient and sub-zero (frozen foods) sections. Our customer was designing a ruggedised barcode reader for use in a food distribution warehouse. Many items can be turned into haptic user interfaces, for example, shoes that vibrate directions to one foot at a crossroads, or steering wheels that vibrate as part of a lane departure warning system. ![]() This is a more refined version of Vibration Alerting, where more information than just an alert needs to be conveyed to the user. Information can be fed instinctively back to the machine operator by vibration motors embedded into the control columns / handles. capacitive switch panels), and other user-interfaces such as machine control sticks / levers. These include capacitive touch-surfaces which do not have a screen (e.g. Precision Microdrives vibration motors can also be used to add haptics to non-screen user interfaces. If you’re considering an LRA, it would be well worth discussing this with one of our application design engineers. Our range is quickly evolving to match the latest / specific customer needs. The axis of vibration varies depending on the form factor, but is always in one axis (whereas ERMs vibrate in two axis). They are available in two specific form factors – coin and bar – with a few square designs. LRAs are commonly used in smartphones and small touch / tracker pads and other sub 200g handheld devices. This automatically tunes the drive signals to make each specific LRA resonate at their own resonant frequency. Trying to make them vibrate even a few hertz either side of this resonant frequency will lead to a significant loss of vibration amplitude and energy.ĭue to small manufacturing variations, each LRA will have a slightly different resonant frequency and therefore a special driver IC is required. This means that LRAs have a resonant frequency at which the amplitude is maximised. Instead of a cone there is a mass which is moved back and forth by a voice coil and a spring. Linear resonant actuators work more like a loud speaker than a traditional ‘motor’. Iron core for lower cost, coreless for medium cost and medium performance and brushless for the highest performance and longest life. We produce these motors with three different motor constructions and technologies. DC motors in particular are easy to control and if long life is necessary, then brushless vibration motors can be used.Ĭompromises are that the amplitude is tied geometrically to the frequency and the speed, for example it’s not possible to alter the amplitude and frequency independently. We can design and manufacture these type of vibration motors using a range of motor technologies, including iron core, coreless and brushless, in both cylinder and coin form factors.īenefits are that the motors are simple to use and understand. They can be found in everything from the smallest smart watch to truck steering wheels. That translates to a wide range of vibration amplitudes and frequencies to match any application. They are simple to use and are available in a wide range of sizes. Eccentric Rotating Mass (ERM) motors represent the original technology for generating vibration. ![]()
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