What is the encoder interface circuit and working principle

What is the encoder interface circuit and working principle?

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.

Common output forms of encoders:

First, the type of open collector:

Usually the encoder does not provide R1 resistance, so an internal circuit is needed to achieve the pull-up or pull-down level.

Encoder interface circuit and MM440 connection

Second, the push-pull output type:

When the output signal "1" is turned on, and when the output signal is "0", T2 is turned on. In this circuit, the output current flows in and out of two directions, so when the cable is extended, the waveform distortion is small, and the cable can extend to about 100 meters. The power supply is DC5-30V, the maximum push-pull current is 30mA

Encoder interface circuit and MM440 connection

Third, the line driver output type:

The line drive output is designed according to the RS-422A standard data transmission circuit. The twisted pair can be used for long-distance transmission, up to 1200m.

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.

What is the encoder interface circuit and working principle?

The encoder output signal includes phase a, phase B and phase Z. The direction can be judged by phase a and phase B, and the mechanical origin (reference position) is determined by phase Z.

When the motor rotates, the encoder outputs a-phase, B-phase and Z-phase pulse signals to the driver.

The direction of rotation can be judged by phase A and phase B.

The mechanical origin (reference position) can be determined by the Z phase. The Z phase is 1ppr and is used as an origin sensor.

There are 1, 2, 4 output signal counting methods. The number of pulses per revolution becomes the resolution.

Resolution: pulse rotation. Unit: The higher the resolution of PPR (pulse rotation), the higher the control accuracy.

The smallest control unit of the servo motor is 1 pulse.