Frequently Asked Questions about Encoders

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.

1. Question: What are the precautions for the selection of incremental rotary encoder?

Four parameters should be noted:

1. Mechanical installation dimensions, including positioning stop, shaft diameter, installation hole position; cable outlet method; installation space volume; whether the working environment protection level meets the requirements.

2. Resolution, that is, the number of pulses output per revolution when the encoder is working, whether it meets the design and use accuracy requirements.

3. Electrical interface, encoder output methods commonly include push-pull output (F type), voltage output (V), open collector (N, common N is NPN output, P is PNP tube output), and long-line driver output. Its output mode should match the interface circuit of its control system.

4. Working voltage

2. Question: How to use incremental encoder?

1. Incremental rotary encoders have different resolutions, which are measured by the number of pulses generated per revolution. The number ranges from 50 to 48000 or higher. The more pulses, the higher the resolution; this is an important basis for selection one.

2. Incremental encoders usually have three signal outputs (there are six signals for differential): ab and z, usually ttl level, a pulse in the front, b pulse in the back, ab pulse difference of 90 degrees, one z per revolution Pulse can be used as a reference mechanical zero position. Generally, a leading b or b leading a is used to judge the direction. The incremental encoder of our company is defined as the clockwise rotation of the encoder at the shaft end as forward rotation, a leading b is 90°, and counterclockwise rotation is reverse b leading. a is 90°. There are also differences, depending on the product description.

3. Use plc to collect data, you can choose a high-speed counting module; use industrial computer to collect data, you can choose a high-speed counting board; use a single-chip microcomputer to collect data, it is recommended to choose an input port with a photocoupler.