Incremental encoders – find manufacturers and suppliers

Incremental encoders are angle code sensors that detect rotary movements and convert them into electrical signals, whereby they record relative position changes, not the absolute position.

They generate pulses per angle of rotation, which are used to determine speed and distance and to monitor machines and devices.

Below you will find the functionality and areas of application of incremental encoders and their advantages:

How incremental encoders work:

1. A disk with evenly distributed increments, e.g. optical lines, rotates together with the shaft.
2. In optical models, a light source shines through the disk and, depending on the position of the lines, light signals are recorded by detectors.
3. Magnetic or capacitive encoders are evaluated in a similar way.
4. The encoder generates pulses with every rotary movement.
5. The number of pulses indicates the rotation, the direction of rotation is determined by two offset signal tracks.
6. As no absolute position is output, the position must be redetermined by a reference run after a restart.

Areas of application for incremental encoders:

1. Position and speed measurement:
Incremental encoders detect the relative position and speed of a rotating shaft or object. They are often used in machines and systems to control precise movements.

2. Feedback in servo systems:
In servo drives, incremental encoders provide feedback that is used to control and adjust motor movements. They help to achieve and maintain the desired position or speed.

3. Speed control:
They are used in motor controllers to measure and control the speed of electric motors. This is important for applications that require constant speeds, such as in conveyor belts or production machines.

4. Machine control and automation:
- In CNC machines, industrial robots and other automated systems, incremental encoders are used to control and monitor precise movements and sequences.

5. Counter applications:
Incremental encoders are used in applications that require accurate counting of revolutions or movements, such as length measuring devices or winding machines.

6. Position detection in elevators and conveyor systems:
Incremental encoders detect the position of elevator cars or other moving parts to ensure precise control and safety.

7. Feedback in stepper motors:
Stepper motors use incremental encoders to monitor the actual position and detect any step losses, increasing the accuracy and reliability of movement.

8. Monitoring and diagnostics:
In industrial applications, incremental encoders can be used to monitor and diagnose machine conditions to detect failures early and schedule maintenance.

Advantages of incremental encoders:

• Incremental encoders are often cheaper to purchase than absolute encoders due to their simpler design. This makes them ideal for many standard applications where precise positioning is not absolutely necessary.
• Incremental encoders offer a high resolution in terms of the number of pulses per revolution. This enables accurate speed and position measurements, especially in applications where exact absolute position is not required.
• Incremental encoders are particularly well suited to measuring rotational speed and direction, as they provide continuous pulses that are evaluated by the controller. They are therefore ideal for applications such as motor controls and control loops.
• Thanks to their simple functionality, incremental encoders can be easily integrated into existing systems. They do not require complex programming or interfaces, which makes implementation quicker and easier.
• Incremental encoders are often more robust against interference from vibration, dust or moisture, especially in industrial environments, as they contain less complex mechanisms than absolute encoders.
• They offer fast signal updating, which is particularly useful for applications that require rapid speed changes or dynamic motion control.
• With incremental encoders, pulse counting can be started at any point in time, allowing for flexible positioning and application. The zero position can be easily redefined without the need for mechanical adjustment.
• Incremental encoders provide standardized output signals (e.g. TTL, HTL) that can be directly processed by many control systems and devices. This facilitates compatibility with a wide range of systems.

Incremental encoders are versatile and indispensable sensors in many areas of industrial automation, robotics and machine control, where precise measurements and feedback are crucial.

Here are the most important aspects to look out for when buying incremental encoders:

When buying incremental encoders, there are some important points to consider to ensure they meet the requirements of your application:

• The resolution of an incremental encoder indicates how many pulses per revolution (PPR) it generates. A higher resolution enables more accurate position and speed measurement.
• Pay attention to the suitability for the operating environment, especially with regard to temperature ranges, humidity, dust or vibrations. Choose a robust encoder for industrial applications.
• Check that the encoder is compatible with the operating voltage of your system, usually 5V, 12V or 24V.
• Ensure that the encoder provides the correct signal type (e.g. square wave, sine wave) and signal form (TTL, HTL) that is compatible with your control system.
• The encoder should be mechanically compatible with your application. Pay attention to the design (e.g. hollow shaft, solid shaft) and the mounting type (e.g. flange or clamp mounting).
• Make sure that the encoder is designed for the maximum speed of your application to ensure precise measurements and a long service life.
• Check the connection type and cable length to ensure that the encoder can be easily integrated into your system.
• The quality of the bearings influences the service life of the encoder. Choose encoders with high-quality bearings to minimize downtime.
• Manufacturer certifications can be an indicator of quality. A more expensive encoder with higher quality and longevity can be more economical in the long run.

These factors will help you select an incremental encoder that is best suited to the requirements of your specific application.

Incremental encoders can be purchased from various suppliers. You will find comprehensive information on manufacturers and suppliers of Incremental encoders around the world on Exportpages.