

- Changchun Rongde Optics
- Co.,Ltd.
- Add:No.1666 Yaan Road,
- North Lake Development District,
- Changchun 130102,China
- Tel:86-431-81881745
- Fax:86-0431-85256892
- E-mail:rongdecui@roundss.net
- Skype:adacui_roundss
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Encoder FAQ!
Changchun Rongde Optics Co.,Ltd. Release time:2016/8/3 Browse:744Q: What is an encoder?
A: An encoder is a sensor of mechanical motion that generates digital signals in response to motion.
Q: How do you install an Encoder?
A: For step by step tutorials on how to install Anaheim Automation's encoders, click here.
Q: What is the difference between absolute and incremental encoders?
A: Absolute and incremental encoders are different in two ways:
- Every position of an absolute encoder is unique
An absolute encoder never loses its position due to power loss or failure. Incremental encoders lose track of position upon power loss or failure
Q: What is a channel?
A: A channel is an electrical output signal from an encoder.
Q: What is a quadrature?
A: A quadrature has two output channels, with repeating squarewaves, which are out of phase by 90 electrical degrees. From the phase difference, the direction of rotation can also be determined.
Q: What is an index pulse?
A: The index pulse, also referred to as a reference or marker pulse, is a single output pulse produced once per revolution.
Q: What other types of encoder technologies are there?
A: There are two types of encoder technologies.
Optical: This type of technology uses a light shining into a photodiode through slits in a metal/glass disk.
- Magnetic: Strips of magnetized material are placed on rotating discs and are sensed by Hall-Effect Sensors or magneto-resistive sensors.
Q: What types of applications are encoders implemented in?
A: They are frequently utilized in stepper motors, automation, robotics, medical devices, motion control and many other applications requiring position feedback.
Q: Does any encoder disk (codewheel) work with any encoder module?
A: No, each resolution and each disk diameter works with a different encoder module.
Q: What is PPR?
A: PPR stands for pulse per revolution in rotational motion for rotational motion and pulse per inch or millimeter for linear motion.
Q: When can a single output channel be used in an incremental encoder?
A: A single output channel for an incremental encoder can be used when it is not important to sense direction. Such applications make use of tachometers. -
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