Encoders use different types of technologies to create a signal, including: mechanical, magnetic, resistive and optical – optical being the most common. In optical sensing, the encoder provides feedback based on the interruption of light.
Encoders can be used in all applications that require monitoring rotation rate, speed, acceleration, and direction. These sensors can be utilized in many applications found in mechanical engineering, the conveyor industry, material handling and the packaging industry. You are certain to find a suitable rotary encoder for your application from our product offering.
Rotary encoders convert a mechanical input into electrical signals, which can be processed by counters, tachometer, programmable logic controllers and industrial PC’s. They are widely used in modern applications such as CNC machine tools, printing equipment, packaging machinery, conveyor belts and many more.
An incremental encoder is an encoder device that converts angular motion or position of a shaft into an analog or digital code, to identify position or motion. Incremental encoders are one of the most used rotary encoders.
The incremental encoder can be used in positioning and motor speed feedback applications which includes servo/light, industrial or heavy-duty applications.
An incremental encoder provides excellent speed and distance feedback and, since there are few sensors involved, the systems are both simple and inexpensive. The encoder is limited by only providing change information, so the encoder requires a reference device to calculate motion.
Programmable Magnetic Incremental Encoder
The difference in the way that a magnetic encoder gathers information lead to performance differences in different operating environments.
The magnetic encoders are a type of rotary encoder that uses sensors to identify changes in magnetic fields from a rotating magnetized wheel or ring.
Three major components in a magnetic encoder:
- Sensing Circuit
- A rotating wheel or ring
- A series of magnetic poles around the circumference of the wheel or ring
Absolute encoders are feedback devices that provide speed, position information by outputting a digital word or bit in relation to motion. Unlike incremental encoders that output a continuous stream of ubiquitous pulses, absolute encoders output unique words or bits for each position.
By outputting a digital word or bit instead of a stream of pulses, absolute rotary encoders offer several advantages:
- Higher overall resolution vs incremental encoders
- Better start up performance because of low homing time
- Accurate motion detection along multiple axes
- Multiple output protocols for better electronics integration
- Better recovery from system of power failures
Draw Wire Encoder
A draw-wire encoder is a linear measuring device that consists of a spring-wound cable reel with a rotary encoder wounded on the hub of the reel. The cable is attached to a load which draws out the wire as the reel turns causing the encoder to rotate and transmit the amount of rotation either as a voltage pulse stream or digital word. Alternatively, the output can also be provided as analog linear voltage output or even as output from a resolver.
- Measurement Length: The maximum potential travel of the cable will determine the length of the cable reel.
- Accuracy: how closely the output of the encoder matches the real physical distance being measure.
Manual Pulse Encoder
The manual pulse generator is a device for generating pulse in electronic systems under the control of a human operator, as opposed to the pulse automatically generated by the software. MPGs are used on computer numerically controlled machine tools, on some microscopes and on other devices that use precise component positioning. A typical MPG consists of a rotating knob that generates pulses that are sent to an equipment controller. The controller will then move the piece of equipment a predetermined distance for each pulse.
Optical Kit Encoder
The optical kit encoder has a rugged glass-filled polymer enclosure with either a 5-pin or 10-pin latching connector. This optical incremental encoder is designed to easily mount and dismount from an existing motor shaft to provide digital feedback information.
The single-ended output version is typically used with cables of 10 feet or less. For longer cable length, the differential output version is recommended. A secure connection to this encoder is made through a 5-pin or 10-pin latching connector.