Encoders

Encoders are electromechanical feedback devices which are used to give information on position, speed, count or direction in a rotary fashion. Encoders are part of our product range here at Variohm. They are used within various types of machinery for motion feedback and motion control.  

Encoders are a very common devices and can be found within a wide range of equipment throughout many different industries. They are used to convert motion into an electrical signal what is used by the system to determine count/speed/direction. 

Encoders use various types of technologies to create different signals, for example mechanical, magnetic, optical and resistive. They are often used within applications where high speed and high accuracy are desirable.

Encoders are used in many different industries. Their most popular industry is within robotics – particularly on robotic arm joints. They are also widely used in factory automation, motion control and automation.

Some of the most common applications for encoders include;

• Robotics
• Cut to length applications
• Printing & Labelling
• Elevator doors
• Packaging
• Machine Tooling
• Filling
• Sorting
• Conveying 

At Variohm we offer two different types of encoders, these are Incremental Encoders and Absolute Encoders.

Each type is well used for various applications and, whilst they both measure rotational position and angles, there are some very distinct differences in the way that they work.

The main difference between absolute and incremental encoders is the way the record the angle measurement.

An Incremental encoder will measure the angle in set “increments”. When power to the device is cut, the encoder has no memory and will return to 0 and begin measuring from there.

Whereas an absolute encoder, will measure true position.  Absolute encoders will not lose any data when power is cut, it will continue to measure where is left off.

Incremental encoders are used for applications where repetitive movement in the same direction needs to be monitored and where the difference between two angles is required such as; General factory automation, heavy duty applications in paper mills, robotics and speed measurement. 

Absolute encoders can be used for applications when the exact position is required such as;

Telescope Position, Crane Position, Valve Positioning, Machine Tool, Linear Actuator, Motor Position and Hoist & Winch applications.

Absolute encoders can also be multi-turn. This means they have the ability to give position feedback through more than 360 degrees through multiple shaft rotations. Some of them can measure right up to half a billion turns.

Our range of encoders is shown above, they come from our supplier Wachendorff and have the following features;

• Rugged and well suited to industrial applications
• Standard range and custom options available
• 5 year manufacturer warranty

For more information on our encoders or any of the products in our portfolio please contact us