How to deal with the anti-interference problem of the encoder during use

How to deal with the anti-interference problem of the encoder during use?

The encoder is a rotary sensor that converts the rotary displacement into a series of digital pulse signals. These pulses can be used to manipulate angular displacement. If the encoder is used in combination with gear pins or screws, it can also be used to measure linear displacement. The okplazas.com encoder manufacturer will introduce to you: How to deal with the problem of anti-interference during the use of the encoder?

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First: the encoder photoelectric coupling isolation method, in the process of long-distance transmission, the use of photocouplers can cut off the communication between the input channel, output channel and input and output channels of the control system and the servo drive. The main advantage of photoelectric coupling is that it can effectively suppress spikes and various noise interference, thereby greatly improving the signal-to-noise ratio during signal transmission. Although the voltage amplitude of the interference noise is very large, its energy is very small and can only constitute a weak current. The light-emitting diodes in the input part of the optocoupler work under the current state, and the general conduction current is 10-15mA, so even if there is a very high interference, because they cannot provide enough current, it can be suppressed.

Encoder|Transmitter|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.

Second: The twisted-pair shielded wire of the encoder is long-line transmission, and the signal will be affected by interference factors such as electric field, magnetic field and ground impedance during transmission. Choosing a grounded shield line can reduce electric field interference. Compared with the coaxial cable, although the frequency band of the twisted pair is poor, the wave impedance is high and the common mode noise resistance is strong, which can make the electromagnetic induction interference of each small link cancel each other.

Encoder|Transmitter|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.

Third, the anti-interference plan of the encoder power supply system

1. Choose an isolation transformer. Considering that high-frequency noise is mainly passed through the transformer not through the mutual inductance coupling between the primary coil and the secondary coil, but through the coupling of the primary coil and the secondary parasitic capacitance, the primary and secondary isolation transformers are isolated by the shielding layer to reduce its distribution . The capacitor can improve the resistance to common mode interference.

2. Choosing a noise filter can also effectively suppress the interference of the AC servo drive to other equipment.

3. Group the power supply of the encoder, for example, separate the drive power of the motor from the control power to prevent interference between devices.