Electronic ruler common faults and treatment methods

Core Tip: The power supply voltage should be stable. The industrial power supply requires ±0.1% stability. For example, the reference voltage is 10V, which allows fluctuations of ±0.01V. Otherwise, it will cause large fluctuations in display. If the display fluctuation amplitude does not exceed the fluctuation amplitude of the fluctuation voltage at this time, the electronic ruler is normal.

It is known that the electronic ruler is actually a sliding rheostat, which is used as a voltage divider to display the actual position of the measured position with relative voltage. Therefore, several requirements are placed on this device (electronic ruler):

First, the power supply voltage should be stable, the industrial power supply requires ±0.1% stability, such as the reference voltage of 10V, allowing ±0.01V fluctuations, otherwise, it will lead to large fluctuations in the display. If the display fluctuation amplitude does not exceed the fluctuation amplitude of the fluctuation voltage at this time, the electronic ruler is normal.

Second, the power supply must have sufficient capacity. If the power supply capacity is too small, it is prone to the following situation: the mold clamping movement will cause the electronic scale of the glue to display the beating, or the glue movement will cause the display of the clamped electronic ruler to fluctuate. In particular, the solenoid valve driving power supply is prone to the above situation when the electronic scale power supply is together. In severe cases, the voltage fluctuation of the multimeter can be used to measure the voltage fluctuation. If the problem cannot be solved without eliminating static interference, high-frequency interference, or poor neutrality, it is also suspected that the power of the power supply is too small.

Third, there must be no external interference, including static interference and high frequency interference. Therefore, the signal line of the strong electric line and the electronic ruler of the equipment should be separated from the line slot. The electronic ruler should use a forced grounding bracket, and the electronic scale housing (measuring the resistance between the end cap screw and the bracket should be less than 1Ω) should be well grounded. The signal line should be shielded and should be used at one end of the electrical box. Ground the shield wire or connect the negative pole of the DC power supply. When static electricity is disturbed, the voltage measurement of the general multimeter is very normal, but the digital jitter is displayed; the phenomenon is also the same when the high frequency interference occurs. Verify that it is static interference. Use a power cord to short the cover screw of the electronic ruler to a metal on the machine. As soon as it is shorted, the static interference is immediately eliminated. However, high-frequency interference is difficult to eliminate by the above methods, and high-frequency interference occurs in the robot hand and the frequency conversion power saver. It can be verified by stopping the robot or the frequency conversion power saver.

Fourth, can not connect the wrong three lines of electronic ruler, 1#, 3# line is the power line, 2# is the output line except 1#, 3# line power line can be exchanged, 2# line can only be the output line. Once the above line is connected incorrectly, there will be a large linear error, poor control accuracy, and easy display of jitter. If control is very difficult, you should suspect that it is wrong.

5. Installation neutrality is better, the angle is allowed to ±12° error, and the parallelism deviation is allowed to ±0.5mm, which means a certain error. If the angle error and the parallelism error are both too large, the display digital jump will be caused. In this case, the fluctuation of the voltage can generally be measured with the voltage of the multimeter. Be sure to adjust the angle and parallelism. Please pay special attention: after replacing the aluminum alloy bracket of the electronic ruler with a stainless steel bracket at the site, the pull rod mounting position should be raised by 2mm. Otherwise, the grounding problem is solved, and the problem of misalignment is formed, which must be solved at the same time.

Sixth, for the electronic ruler that has been used for a long time, because the pre-product is not sealed, there may be many impurities, and there is a mixture of oil and water, which affects the contact resistance of the brush, resulting in the display of digital beating, which can be considered as the early damage of the electronic ruler itself.

7. The electronic ruler shows that the fault is handled simply. As long as a digital multimeter is on the equipment, a length of wire can be used. As long as the analysis is comprehensive, it is not difficult to judge the problem and solve the problem.

Concerned about surprises

Label: electronic ruler common faults and treatment methods

Previous: LED is not bright, don't worry. Next: The main method of CNC radial drilling machine to avoid collision

Quality control

Six-step QC runs through process from raw materials to finished products.

From Material control, Machining quality control, In-coming material inspection, Assembly line quality control, 100% Leakage test, Final appearance inspection before delivery.

Angle Valve

Angle Valve,Brass Angle Valve,Angle Globe Valve,High Quality Angle Valve

Yuyao Sanyin Bathroom Technology Co Ltd , https://www.chinasanyin.com