Introduction to the Extension of the Eltra Multi Loop Encoder by YiErChuang

About YierchuangEltra multi loop encoderExpansion introduction: Dear users, have you wandered around in the market for most of the time? Have you missed your mark? Has the quotation of eltra encoder from high to low, from low to high, seriously affected your judgment of the product? Then you need to carefully verify the company information. Our company started with the eltra brand and has more than ten years of brand sales experience. You can buy eltra encoders, eltra sensors, etc. from our company with short lead times, good prices, and 100% * product quality. If you find our company, you don't need to worry because we will become *'s partner.
The ELTRA multi turn value encoder has various types such as mechanical gear set counting circles and electronic incremental counting circles. The internal mechanical gear set rotation counting circles, regardless of the position of each circle, and the number of circles is also value, which is called value true multi turn. He is similar to a clock, with 60 minutes and one position on the internal gear meter, which is 1 o'clock, so there can be a range of 12 hours x 60 minutes. However, in this case, there is a range of turns (12 hours), such as the 4096 turns and 65536 turns that are commonly used in multi turn encoders nowadays. So, some people have raised the question of whether exceeding the number of laps is still considered acceptable? Not exceeding the number of turns in one processing, or not exceeding 1/2 of the turns during power-off movement, of course.
Electronic incremental counting, based on the battery's memory of the number of cycles, is actually a single cycle, multi cycle increment. The advantage is that it eliminates a set of mechanical gears, is economical, small in size, and has no limit on the number of cycles. It seems good, but it is still a multi cycle increment and cannot be considered a true value. What is a true value? It doesn't rely on direct readings from the previous history. After a power outage, due to the requirement of low battery power consumption, the speed and range of movement are actually limited. In addition, due to the factor of the battery, there are still doubts about reliability, such as leakage loops in high speed, wrong loops in interference, shaking wrong loops exactly at the 12 o'clock position, and battery failure wrong loops. Especially if there is a mistake in counting circles, it will be impossible to find the original position.
In fact, many people understand that using values is a problem of moving after a power outage, but they do not understand the true purpose of Germans using mechanical multi turn values in motion control. Since the true value does not rely on direct readings from the previous history, there is no need to worry about losing data at high speeds, and in motion control, there is no need to constantly follow the encoder values. Coupled with fast communication such as EnDat, a lot of time can be saved to complete other calculations, thus solving problems such as high-speed synchronization and multi axis linkage.
In addition, as mentioned above, for mechanical multi turn values, the movable position after a power outage is 1/2 of the number of turns, for example, 2048 turns out of 4096 turns, instead of 4096 turns, because the movement after a power outage may be forward or reverse. Considering the * nature of the value, the movable position is actually 2048 turns.
About YierchuangEltra multi loop encoderIntroduction to Expansion; The signal output of the multi loop encoder includes parallel output, serial output, bus type output, and transmission integrated output.
1. Parallel output:
The output of a multi loop encoder is a multi bit digital code (Gray code or pure binary code). Parallel output refers to multiple high and low level outputs on the interface, representing the 1 or 0 of the digital code. For encoders with low bit numbers, the digital code is usually output directly in this form, which can be directly entered into the I/O interface of the PLC or upper computer. The output is instant and the connection is simple.
However, parallel output has the following issues:
1) It must be a Gray code, because if it is a pure binary code, there may be multiple bit changes during data refresh, and the reading may cause errors in a short period of time.
2) All interfaces must be ensured to be properly connected, as if there are individual points of poor connection, the potential at that point will always be 0, causing error codes and making it impossible to determine.
3) The transmission distance cannot be far, usually one or two meters, and there is isolation for complex environments. 4) For a large number of bits, multiple core cables are required and good connections must be ensured, which brings engineering difficulties. Similarly, for encoders, there must be multiple node outputs at the same time, increasing the failure and damage rate of the encoder.
2. Serial SSI output:
Serial output is the practice of outputting data in chronological order through a protocol called a communication protocol. The physical forms of its connection include RS232, RS422 (TTL), RS485, etc. Due to the fact that good manufacturers of multi turn value encoders are all in Germany, most of the serial outputs are compatible with Siemens in Germany, such as SSI synchronous serial outputs.
SSI interface (RS422 mode), connected by two data lines and two clock lines, sends interrupted clock pulses from the receiving device to the encoder, and the position value is synchronously output to the receiving device by the encoder and the clock pulse. Triggered by a clock signal from the receiving device, the encoder outputs a serial signal synchronized with the clock signal starting from the high bit (MSB).
The lack of serial output connection lines and long transmission distance greatly improve the protection and reliability of the encoder.
Generally, high-order encoders use serial output.
3. Fieldbus type output:
A fieldbus encoder is a device that connects multiple encoders with a pair of signal lines, and transmits signals through communication by setting addresses. The signal receiving device only needs one interface to read multiple encoder signals. Bus type encoders can save connection cables and receive device interfaces, with long transmission distances. In the case of centralized control of multiple encoders, they can also greatly save costs.
What we do
Since 1985, Eltra has been dedicated to the automation sensor market. Over the past 30 years, Eltra has continued to grow while continuously providing new product technologies (with over 5000 product models and an average of 120000 articles published annually). Having the flexible production capability and technology to provide customized products for customers has always been a prominent feature of the Eltra brand. Our company offers a wide range of products, including incremental rotary encoders and value rotary encoders, explosion-proof, wire type encoders, magnetic encoders, gratings, magnetostrictive sensors, encoders with various bus interfaces, and some supporting accessories. We also provide services based on customer project development needs.
Company History
Like many other successful companies, Eltra was born from a garage. Although it was initially just a hobby, it quickly developed into a solid commercial project. In 1985, Eltra was founded in Sarago. Since then, Eltra has experienced stable growth and development both domestically and internationally. In the 21st century, Eltra strategically decided to establish branch offices in Slovakia and China. In 2004, Eltra became a limited liability company and joined the Anhua Gao Group, providing key product technologies and consolidating the market, while also maintaining Eltra's existing Italian corporate culture and the pursuit of quality included in Italian manufacturing.
mission
In the past 30 years, there have been many changes both inside and outside of Eltra.Introduction to the Extension of the Eltra Multi Loop Encoder by YiErChuangNo matter how it changes, Eltra has always focused on the same goal: to develop and manufacture more encoders with high efficiency, high quality, and low cost to meet customer needs. Eltra is well aware that to achieve this goal, it is necessary to invest in a team that possesses key secrets and specialized skills, as they are the true wealth of the company. Thanks to the contributions of these people, Eltra has continued to grow and develop for 30 years until now.