All you need to know about Magnetic Rotary Encoder

The term encoders refers to a type of sensors that are used to send digital signals whenever they detect a moving object. Encoders that respond to a linear motion are mainly divided in shaft encoders and linear encoders. When combined with devices for mechanical conversion (spindles, rack and pinions and measuring wheels), these encoders can furthermore be utilized to measure not only linear motion, but also speed and position.


There are various types of outputs for various types of encoders. For instance, the incremental encoders produce series of impulses with their movement. These impulses can be utilized in two main and very important ways: to keep track of the current position by being fed to a counter, or to measure the speed. There are also the so called absolute encoders that generate multi-bit words and are good and direct indicators of the direct and actual position. There is a whole variety of applications that makes use of encoders.

These are the applications for which they can be put to use: assembly machines, door control devices, robotics, labeling machines, lens grinding machines, x/y indication, plotters, analysis devices, testing machines, ultrasonic welding, drilling machines, mixing machines, medical equipment, converting machinery.

The biggest dividing factor among encoders is the sensing technology they use. It can be either optical or magnetic sensing technology. The difference between the two is that the optical sensing makes it possible for high resolution, high speed of operation and reliability in industrial environment to happen. A magnetic rotary encoder, on the other hand, is accountable for high operating speed, good resolution, high resistance to dust and moisture and a solid ground opposing forces such as thermal and mechanical shock.

READ  Best Android Apps For Your Smartphone


If you are looking for technology that is highly resistant to grease, dust moisture and thermal/mechanical shock, then you are in need of a magnetic rotary encoder.

Just make sure that you pick the right kind of magnetic rotary encoder. For instance, a variable reluctance sensor is able to detect alterations in the magnetic field that are brought about by a certain movement of a given ferromagnetic object. The simplest of these devices are called magnetic pickups and consist only of a permanent magnet and a coil wound that is wrapped around. This type of sensor is used for speed measuring and in order to work it requires a moving target.

Yet another type of sensor utilizes a Hall effect and a permanent magnet so that the alteration in electrical resistance or voltage can be achieved. This type of sensor is available in both linear and rotary forms and has the ability to work at the lowest speed possible.

Related posts

The Best Apps For iPhone

The Best Apps For iPhone

If you own iPhone, I guess you are here to find out about the useful and best apps for iPhone.Tastes are different and each of them has their own aspirations, but when it comes to Apple " free " always has a special meaning. These are the best free iPhone apps . Must Have iPhone...

Tips On Selecting the Right Gear Box Size

Tips On Selecting the Right Gear Box Size

There are several different criteria that need to be considered before buying a gearbox, none of which is to be undermined. The gearbox type that will be most suitable for a certain driven machine is to be designated during the project phase. The technical staff that are in charge of...

Best Android Apps For Your Smartphone

Best Android Apps For Your Smartphone

The new generation of phones are getting better and better. Android smart phones are one of the most selling products in the last years, and they also make the best android apps which make the phone much more flexible for use. There are plenty of apps, but do you know which are the best free...