Analysis of all kinds of rotary encoder features and applications
Many different kinds of rotary encoder, according to the material and the principle of photoelectric encoder, magnetoelectric encoder, incremental encoder, absolute encoder, we should have when choosing rotary encoder based on their needs to make the right choice.
Customers choose to use the photoelectric encoder or magnetic encoder?
First of all should consider some of the most important characteristics of the encoder.
In addition to the successful implementation of professional applications, customers friends should also consider whether to choose incremental encoder and absolute encoder?
Even if using the same sensing mechanism, the performance of this two kinds of rotary encoder also have very big difference.
In order to achieve successful application system, the customer should need to know all the characteristics of the two encoders, and make the right choice.
Incremental encoder pulse count, the need to use additional electronic equipment of pulse and data conversion data to achieve the speed or movement, absolute encoder can generate digital signal to the absolute position identification.
In short, simple application of incremental encoder is usually more suitable for low performance, and absolute encoder is the best choice for critical applications -
These complex applications with higher speed and position control requirement.
The output type depends on the specific application.
When mobile incremental encoder, the encoder and the shaft speed (
Proportional or moving distance (
Generate binary pulse flow.
Placed in the LED light source and a specific style of light sensor or linear encoder between optical encoder with alternative conduction or block instead of analog signals generated by the light beam;
The additional circuit (
Usually on-board ASIC)
Analog signal is converted to a square wave.
Magnetoelectric encoder can be operated in a variety of mechanisms, but a rotating magnetic field, it will lead to voltage pulse or resistance change, can be converted into pulse.
Biggest drawback of incremental encoder is when (the system is powered off
For example, a temporary power outage)
, it won't be any incremental encoder output tracking changes.
Therefore, in order to provide accurate position data, incremental encoder must return to the initial position when it is started.
For conveyor shut down every night such as application, then restart every morning, the incremental encoder to return to the initial position will not affect the application.
Application in automobile assembly manipulator, however, if the welding power is, the incremental encoder to return to the initial position, this will seriously damage the product and the mechanical arm.
Absolute encoder is the ideal choice for high reliability.
Type and incremental encoder, absolute encoder will not output pulse, but output digital signals to indicate the position of the encoder, and the position of the encoder for static absolute coordinates of reference points.
Therefore, when the power is cut off, absolute encoder can still maintain its absolute position record.
After restart, the system can immediately restore movement, do not need to return to the initial position.
As mentioned above, the absolute encoder is applied to the key security issues, return to the initial position of the encoder is not allowed, such as nc machine tools with high performance.
In addition, the encoder or return to the initial position will greatly increase the ideal time or application costs, such as DNA sequencing based on the analysis of many days without electricity, the system requires reliable restart without hurting carefully cultivated samples or the result of the impact analysis.
Shanghai electronic products for 27 years old, encoder manufacturers, specializing in the production of various types of encoder.
Magnetoelectric encoder, can according to customer's requirement to customize for incremental type magnetoelectric encoder and absolute type magnetoelectric encoder, pulse precision and size can be customized according to customer requirements.
Magnetoelectric encoder used in robot, automatic production lines, automatic assembly machine, elevator, textile machinery, sewing machinery, packaging and printing machinery, CNC machine tools, mapper and Angle measuring instrument, etc.
This encoder is also can be in PLC application as the high speed signal input element, make PLC more quickly and accurately implement the closed-loop control.
Looking for a rotary encoder manufacturer is looking for electronic.