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  • Magnetic Field Sensors as Speed Monitors
    Magnetic field sensors are generally based on the magneto-resistive or Hall-principle. Compared to optical speed sensors, resolvers and precision potentiometers, magnetic field sensors do not contain movable parts, such as shafts, bearings, code disks or slip rings. An aspect allowing them
  • Industrial encoder integrates bearing and sensor functions
    north and south poles is placed near the Hall element inside the bearing seal. When the ring spins, the waterproof Hall sensor provides an output signal that determines the speed (and position) of the ring. A single or dual Hall-effect sensor brings the signal out to a waterproof industrial-grade
  • Monitor Coal Feeder Conveyor Speeds for Precise Discharge
    The Electro-Sensors SA420 Signal Conditioner, 907XP Hall Effect Sensor and Split. Collar Pulser Wrap. can be used to modulate gravimetric conveyor shaft speed for precise coal discharge.
  • No problem with noncontacting sensors
    Invensys Sensor Systems, El Paso, Tex., (Clarostat Div.) has developed a rotary Hall-effect position sensor, the HRS100, that cuts cost by integrating all compensation circuitry into a single factory-programmed sensor ASIC. Resistive potentiometers or "pots " have long been used for rotary position
  • Magnetic Sensing
    without an external power source. They have high resolution, generating many pulses/in. of target travel and can sense very small ferrous objects. For example, one sensor responds to 96-pitch gears, while Hall-effect sensors can only register 16-pitch gear teeth. In these applications, magnetic
  • Souped-up servoamps
    signals, and Hall sensor data. The motor rotating magnetic field exerts maximum torque on the permanent magnet rotor when the rotor magnetic field and the stator rotating magnetic field are 90 apart. Field-oriented control maximizes motor torque by preserving this 90 displacement at all shaft speeds
  • Pneumatic or servo?
    is the absence of an alarm signal as generated by some sensor, usually a mechanical or Hall-effect switch located near the mechanical stop. The speed at which events happen under open-loop control is dictated by physical factors such as mechanical friction and the amount of force the actuator generates
  • Micro moves
    mechanism, typically a slide or flexure. The end of the Squiggle screw moves the lens mechanism with precise speed and micrometer resolution. The mechanism incorporates position sensing to produce controlled steps. The camera's CMOS image sensor, Hall-effect, optical, or potentiometer devices may do

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