Tongmao voice coil motor to teach you to solve the encoder fault, the voice coil motor is more and more widely used in CNC machine tools, precision measurement, laser processing, wafer manufacturing, IC packaging and testing, PCB assembly and other equipment can find typical Example. As the requirements of speed, acceleration, and accuracy of these devices increase and progress in accordance with the Moore's Law model, the control mode of the rotary servo motor plus screw is no longer adapted to its needs, and instead is the voice coil motor drive mode. Voice coil motor technology has the advantages of small friction, small maintenance workload and high production efficiency. However, this increase in productivity depends on the coordination of the control system, the motor, and the position encoder. Tongmao voice coil motor takes you to know the encoder and fault handling.
Encoders are devices that convert signals or data into signals that can be used for communication, transmission, and storage. Encoder angular displacement or linear displacement into electrical signals, the former known as the code wheel, which is called yardstick. According to read out the encoder can be divided into contact and non-contact two; according to the principle of encoder can be divided into two types of incremental and absolute. Incremental encoder is the displacement is converted into periodic electrical signals, 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 specific digital code, so its indication depends only on the start and end position of the measurement, regardless of the intermediate process of the measurement.
First, the encoder itself fault: refers to the encoder itself component failure, resulting in it can not generate and output the correct waveform. In this case, replace the encoder or repair its internal components.
Two. Encoder connection cable fault: the probability of such failures appear high, often encountered in maintenance, should be a priority factor. Usually the encoder cable is open, shorted or poorly connected, in which case the cable or connector needs to be replaced. Should also pay special attention to whether it is due to the cable is not tight, causing loosening caused by welding or open circuit, then need to clamp the cable.
Encoder +5 V power down: refers to the +5 V power supply is too low, usually not less than 4.75V, resulting in too low due to power supply failure or power transmission cable resistance caused by excessive loss, then repair the power supply Or replace the cable.
Four absolute encoder battery voltage drop: This failure usually have a clear meaning of the alarm, then replace the battery, if the reference point position memory is lost, you must also perform the reference point return operation.
V. Encoder cable shielded cable is not connected or off: This will introduce interference signals, the waveform instability, affecting the accuracy of communication, we must ensure that the shielded wire welding and grounding reliable.
6. Encoder installation loose: This failure will affect the accuracy of position control, resulting in stop and move the position deviation tolerance, or even just start the servo system overload alarm, please pay special attention.
Grating pollution: This will make the signal output amplitude decreased, you must use cotton wool moistened with alcohol gently wipe the oil.
Tongmao voice coil motor independently developed high-quality, high-performance linear motor, linear motor, linear motor, linear motor, linear module, voice coil motor, voice coil motor, voice coil module and precision linear platform using European and American technical standards , Technology and testing methods, its quality and dynamic performance has reached the international level, can replace similar foreign products. With our years of professional design and production of linear motors, excellent quality and superior dynamic performance, the company's linear motor products have been recognized and identified many large customers at home and abroad, 70% of the products are sold to Europe and the United States and other developed countries, such as Germany , The United States, the Netherlands, Malaysia and so on. Hotline: 400-007-7724, can also visit our official website www.tmmotion.com for more information.
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