German IFM encoder IFM model IFM price

IFM encoders belong to the detection and transmission stage in closed-loop control. They are used to detect the rotor magnetic field position of servo motors, provide accurate motor speed and position signals, and then the magnetic encoder outputs signals to the drive for analysis, comparison, and logical judgment, finally driving the servo motor. In fact, a magnetic encoder is a sensor that constantly provides accurate signals to the drive to facilitate precise analysis and judgment.

IFM encoder accuracy

(1) Uses code disks with 8421 coding. Although relatively simple, strict requirements are placed on the manufacturing and installation of the code disk; otherwise, erroneous codes may occur. When the brush transitions from binary code 0111 to 1000, 7 should change to 8. However, if the brushes do not enter the conductive area in a consistent sequence, any decimal number between 8 and 15 may appear. This results in the aforementioned non-single-valued error. One method to solve this problem is to use a cyclic code disk. Due to the characteristics of cyclic codes, even if manufacturing and installation are inaccurate, the maximum error generated is only one bit in the least significant position. Therefore, using a cyclic code disk offers higher accuracy than using an 8421 code disk. (2) Scanning method. There are three types of scanning: V scanning, U scanning, and M scanning. A brush is installed on the least significant bit track, while two brushes are installed on other bit tracks: one brush is located ahead of the measured position, called the leading brush; the other is placed behind the measured position, called the lagging brush. If the incremental width of the effective bit on the least significant bit track is z, then the distances corresponding to the brushes for each bit are 1x, 2x, 4x, 8x, etc. Thus, at each definite position, the output level of the least significant bit brush reflects its true value. Since there are two brushes for higher bits, two levels will be output. Based on the brush distribution and encoding change rules, to read the level value corresponding to the higher-order binary code reflecting that position, when the brush on the lower-level track truly outputs "1", the true output on the higher-level track must be read from the lagging brush; if the brush on the lower-level track truly outputs "0", the true output on the higher-level track must be read from the leading brush. Since there is only one brush on the least significant bit track, its output represents the true position. This method is the V scanning method.

IFM encoder applications

The main function refers to a program or device capable of compressing or decompressing digital video. It is the process of compression and potentially changing the video content format, converting an analog source to a digital source. Both audio and video require customizable compression methods. In terms of compression, the goal is to reduce occupied space. As long as it is digital video, it requires transmission via a video encoder signal to better provide technical implementation for live video streaming. High-definition digital video codecs are video compression standards completed through applications.

IFM encoder features

1) After power-up or following internal and external power faults, the encoder does not require reference driving and can obtain the current accurate position once power is normal. Under interference conditions in various harsh environments, the raw position test data of the hollow shaft encoder remains stable and is not easily affected by interference. 2) The encoder can provide an incremental pulse code value for each axis position, especially in position control. Incremental encoders do not require counting, enabling direct high-speed internal reading and external output. Secondly, the hollow shaft encoder offloads calculation tasks to the receiving device controller, which can reduce the cost of other additional input components. For example, hollow shaft encoders in multi-axis parallel-working industrial robots can achieve high-speed multi-axis parallel synchronous operation, as well as in various control fields requiring multi-axis synchronization. 3) Fast and reliable digital data transmission is currently one of the core elements of encoders. Due to their high-resolution characteristics, general hollow shaft encoders directly output digital signals without internal or external counting, so they are no longer affected by pulse reading and accumulation. They can respond at high speeds; in some high-efficiency equipment, hollow shaft encoders can also achieve high-resolution counts. 4) Furthermore, the encoder is a very flexible type, characterized mainly by compactness and easy adjustment; positions are generally adjustable via spring leaves, and hollow shaft encoders can determine the rotation direction through A phase pulse signals and B phase output timing, thereby interpreting the pulse signal values. Currently, hollow shaft encoders are generally suitable for multiple application scenarios. 5) The clamping method and spring leaf structure of this shaft encoder allow for very convenient position adjustment and absorption of load vibration and shock. Moreover, during operation, the hollow shaft encoder outputs based on the rotational displacement of the shaft; combined with the shaft via a coupling, it can directly detect rotational displacement. Typically, no origin reset is required at startup; under normal conditions, the rotation angle can be output in parallel as an absolute value.

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