How to detect the failure of the photoelectric encoder of CNC equipment machine tool

How to detect the failure of the photoelectric encoder of CNC equipment machine tool?

The photoelectric encoder detection is an important part of the CNC equipment machine tool servo system. It has the effect of detecting the displacement and speed of each operating axis, so that the detected signal reaction forms a closed loop system. In CNC machine tools, photoelectric pulse encoders are used as components for speed and position detection. The incidence of faults is relatively high, and the external performance is diverse. In our maintenance practice, the faults of photoelectric pulse encoders are summarized and classified to make The fault is more clear.

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.

Measurement methods can be divided into direct measurement and indirect measurement: direct measurement. This is to select the linear detection element measurement in the linear displacement of the CNC equipment machine tool. The commonly used detection elements in the direct measurement usually include the 3360 linear induction synchronizer, the measuring grating, and the magnetic scale laser interferometer. Indirect measurement is to measure the linear displacement of CNC equipment and machine tools. The commonly used inspection elements usually include: photoelectric encoder, resolver, circular induction synchronizer, circular grating and circular magnetic grating.

When the photoelectric encoder of CNC equipment machine tool has the following defects, it should be considered whether it is caused by the defect of the detection component:

1. Mechanical vibration of CNC equipment and machine tools (during acceleration and deceleration)

1. The pulse encoder is faulty. Now, check whether the voltage of the reaction line terminal on the speed unit drops at a certain point. If it drops, it means that the pulse encoder (electronic steering wheel) is faulty. Replace the photoelectric encoder of the CNC machine tool.

2. The pulse encoder cross slider coupling is damaged and the shaft speed is not synchronized with the detected speed. You can replace the photoelectric encoder of the CNC equipment machine tool.

3.If the tachometer generator fails, correct or replace the tachometer.

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.

5. Alarms caused by program errors and operation errors in CNC equipment machine tool alarms.

For example, the numerical control alarm 090.091 of the FAUNUC6ME system shows a numerical control alarm, which is considered to be because of the main circuit failure and the feed speed is too low.

Common factors are; the photoelectric encoder of CNC equipment and machine tools malfunctions. The power supply voltage of the photoelectric encoder of the numerical control equipment machine tool is too low (currently adjust the 15V of the power supply voltage so that the voltage value of the 5V terminal of the main substrate is within 4.95-5.10V). The one-touch signal of the photoelectric encoder of the numerical control equipment machine tool is not input, and the reference point is not performed normally.