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Current position£ºHome > News How to solve the encoder failure

How to solve the encoder failure

time£º2017/8/23  click£º7557

¡¡¡¡At present, the application of linear motor is more and more widely. Typical examples can be found in the field of numerical control machine tools, precision measurement, laser processing, wafer manufacturing, IC package testing, PCB assembly and other equipment. Due to the increasing and progressing of Mohr's Law model for the requirements of speed, acceleration and accuracy of such devices, the control mode of rotary servo motor plus screw is no longer suitable for its needs. Instead, the linear motor drive mode is adopted. Direct motor technology has the advantages of small friction, small maintenance workload and high production efficiency. However, this increase in production efficiency depends on the coordination of the control system, the motor, and the position encoder. This article Tongmao linear motor with your understanding of encoder and fault handling..
¡¡¡¡An encoder is a device that compiles a signal or data into a form of a signal that can be used for communication, transmission, and storage. Encoder to angular displacement or linear displacement into electrical signals, the former called the code plate, which is called the code scale. In accordance with the working principle, the encoder can be divided into two types: incremental and absolute. Incremental encoder is the displacement into a periodic electrical signal, then the electrical signal into a count pulse, with the number of pulses that the size of the displacement. Each position of the absolute encoder corresponds to a definite digital code, so its indication is related only to the start and end positions of the measurement, independent of the measured intermediate process.
¡¡¡¡1. Encoder itself failure: refers to the encoder itself component failure, resulting in it can not produce and output the correct waveform. In this case, replace the encoder or repair its internal components.
¡¡¡¡2. Encoder connection cable failure: the highest probability of such failure, maintenance often encountered, should be a priority factor. Usually for the encoder cable circuit, short circuit or poor contact, then need to replace the cable or connector. Should also pay special attention to whether the cable is not tight, resulting in loose caused by welding or open circuit, then need to clamp the cable.
¡¡¡¡3. Encoder + 5V power down: refers to the +5 V power supply is too low, usually not less than 4.75V, resulting in too low because the power supply failure or power transmission cable resistance caused by large loss, then need to repair power Or replace the cable.
¡¡¡¡4. Absolute encoder battery voltage drop: This failure usually has a clear alarm, then need to replace the battery, if the reference point location memory is lost, you must also perform a return to the reference point operation.
¡¡¡¡5. Encoder cable Shield line is not connected or off: This will introduce the interference signal, the waveform instability, affecting the accuracy of communication, must ensure reliable welding and grounding shielded.
¡¡¡¡6. Encoder installation loosening: This failure will affect the position control accuracy, resulting in stop and move the amount of deviation in the amount of tolerance, or even just a boot that produces servo system overload alarm, please pay special attention.
¡¡¡¡7. Grating pollution: This will reduce the rate of signal output, must be dipped in absorbent cotton alcohol gently wipe the oil.
¡¡¡¡Kunshan Tongmao Electronics Co., Ltd. is a professional manufacturer and manufacturer of high performance and high quality linear and swing motion solutions. The main products are voice coil motor and linear motor. Our encoder adopts imported products, mainly American and British encoders. Our linear motor equipped with grating encoder with small size, light weight, high speed, high precision, high integration, etc., makes our linear motor function advantages to double. Buy linear motor, please look for the Tongmao