Integral Magnetic Encoders | Magnetic Encoders | Optical Encoders | Capacitive Encoders

A range of different encoders is available for applications requiring an accurate control of motor velocity, direction of rotation and positioning. The performance of a drive or servo system depends on the precision and reliability of the servo components available. MICROMO incremental shaft encoders are based on the optical or magnetic design principles. To reduce the influence of resonant frequencies, the encoders are mounted directly on the shaft or integrated into the motor itself.

MICROMO offers the following encoder products:

 Operating principles of the integral magnetic encoders

Series IE2 encoders consist of a rotor-mounted magnetic toothed ring and a special hybrid circuit. The magnetic field differences between the tip and base of each tooth are converted into electrical signals by a sensor integrated into the circuit. This signal is then processed by a proprietary circuit. The output consists of two 90°-offset square-wave signals with up to 512 pulses. The encoder is integrated into the SR-Series motors, increasing its length by a mere 1.4 mm and as a build-on option for DC-micromotors and brushless DC servomotors.

Some of the features:

• Highly compact design
• High resolution with up to 2,048 lines per revolution corresponding to an angular resolution of 0.18°
• Manetic operating principle meaning long service life, no component aging, and insensitive to dust, contamination, and light.
• Low mass and weight
• No pull-up resistors across outputs because no open-collector outputs
• Symmetrical pulse edges, CMOS and TTL compatible
• Low power consumption
• Available in many combinations

Fields of Application

These compact and ruggedly designed incremental encoders are suitable for use under severe ambient conditions.

They provide compact drive solutions characterized by a high level of performance and reliability.

• Indication and control for shaft velocity and direction of rotation
• Positioning tasks calling for compact high-resolution drive systems

Operating principles of magnetic encoders

Magnetic encoders are based on a multi-pole permanent magnet disc mounted directly on the motor shaft. Magnetic flux variations are detected by magnetic sensors and converted into output signals with a 90° phase shift. This principle allows the configuration of micro-encoders characterized by very small dimensions and high resolutions.

Operating principles of optical encoders

Optical encoders use a continuous infrared light source transmitting through a low-inertia multi-section rotor disk which is fitted directly on the motor rear end shaft. The unit thus generates two output signals with a 90° phase shift. The new R22i Optical Encoder is perfect for light automation and office automation applications.