Spot sales of German IFM encoder

NegotiableUpdate on 05/26

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Nature of the Manufacturer: Producers

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Overview

Spot sales of German IFM encoders are devices that encode and convert signals (such as bitstreams) or data into signal forms that can be used for communication, transmission, and storage. The encoder converts angular displacement or linear displacement into electrical signals, the former is called a encoder and the latter is called a ruler. According to the reading method, encoders can be divided into two types: contact type and non-contact type; According to the working principle, encoders can be divided into two categories: incremental and absolute.

Product Details

The German IFM encoder has 5 leads, including 3 pulse output lines, 1 COM terminal line, and 1 power line (OC gate output type). The power supply of the encoder can be an external power supply or directly use the DC24V power supply of the PLC. The "-" end of the power supply should be connected to the COM end of the encoder, and the "+" end should be connected to the power supply end of the encoder. The COM end of the German IFM encoder is connected to the input COM end of the PLC. The A, B, and Z phase pulse output lines are directly connected to the input end of the PLC. A and B are pulses that are 90 degrees apart, and the Z phase signal has only one pulse when the encoder rotates one revolution. It is usually used as a basis for zero point. When connecting, attention should be paid to the response time of the PLC input. The rotary encoder also has a shielded wire, which should be grounded during use to improve anti-interference performance.

Encoder ----------- PLC

A-----------------X0

B-----------------X1

Z------------------X2

+24V------------+24V

COM------------- -24V-----------COM

Spot sales of German IFM encoderWorking principle:

A photoelectric encoder with a central axis, which has circular markings for light and dark, is read by photoelectric emitting and receiving devices to obtain four sets of sine wave signals combined into A, B, C, and D. Each sine wave has a phase difference of 90 degrees (360 degrees relative to one cycle), and the C and D signals are reversed and superimposed on the A and B phases to enhance stable signals; Additionally, output a Z-phase pulse for each revolution to represent the zero reference position.

Due to the 90 degree difference between phase A and phase B, the forward and reverse rotation of the encoder can be determined by comparing whether phase A is ahead or phase B. By using the zero position pulse, the zero position reference position of the German IFM encoder can be obtained. The materials of encoder encoders include glass, metal, and plastic. Glass encoders deposit very thin engraved lines on glass, which has good thermal stability and high accuracy. Metal encoders directly engrave lines with or without lines, which are not fragile. However, due to the thickness of metal, the accuracy is limited, and its thermal stability is one order of magnitude worse than that of glass. Plastic encoders are economical and have low cost, but their accuracy, thermal stability, and lifespan are all inferior.

Resolution - The German IFM encoder provides a resolution of 50000 to 10000 lines per revolution, based on the number of lines provided per 360 degrees of rotation, also known as resolution division or direct line count.

Spot sales of German IFM encoderThe signal output includes sine wave (current or voltage), square wave (TTL, HTL), open collector (PNP, NPN), and various forms of push-pull, among which TTL is a long line differential drive (symmetrical A, A -); B,B-; Z. Z -), HTL also known as push-pull or push-pull output, the signal receiving device interface of the encoder should correspond to the encoder.

Signal connection - The pulse signal of the encoder is generally connected to a counter PLC、 Computers, PLCs, and modules connected to computers can be divided into low-speed modules and high-speed modules, with switch frequencies ranging from low to high.

As a single-phase connection, it is used for one-way counting and speed measurement.

A. B two-phase connection, used for counting forward and reverse directions, determining forward and reverse directions, and measuring speed.

A. B, Z three-phase connection, used for position measurement with reference position correction.

A. A -, B -, Z - connections, due to the connection with symmetrical negative signals, the electromagnetic field contributed by the current to the cable is zero, with minimal attenuation, excellent anti-interference, and can transmit over long distances.

For TTL encoders with symmetrical negative signal output, the signal transmission distance can reach 150 meters.

For HTL encoders with symmetrical negative signal output, the signal transmission distance can reach 300 meters.

The advantages of German IFM encoder: small size, precision, high resolution, no contact or wear; The same variety can detect both angular displacement and linear displacement with the help of mechanical conversion devices; The multi turn photoelectric absolute encoder can detect linear displacement over a considerable range (such as 25 bit multi turn). Long lifespan, easy installation, diverse interface forms, and reasonable price. Mature technology has been widely applied both domestically and internationally for many years.

The disadvantages of the German IFM encoder: precision but high protection requirements for outdoor and harsh environments; Measuring linear displacement requires the conversion of mechanical devices and the elimination of errors caused by mechanical clearances; Detecting objects in orbit is difficult to overcome slip.