West Verdi:Binary Encoder FailureDetection and Solution
Binary encoder in the use of the process will sometimes appear some faults, today we come to list the binary encoder several kinds of faults, and analyze the reasons for the failure, and tell you some of the absolute value encoder failure solutions, as well as binary encoder detection (check and test) method.
few commonBinary Encoder Failureand the reasons for the failure.
1, binary encoder rotation noise: mainly in the volume absolute value encoder, because the volume absolute value encoder is often rotating.
2, the binary encoder due to overcurrent and serious burn failure: this binary encoder burned into an open circuit. Adjust the volume of the speaker will appear ;creak ;creak ;loud, stop turning the binary encoder when the noise disappears, which indicates that the volume of absolute value encoder rotation noise failure.
3, the binary encoder internal pin disconnection fault: this time the volume absolute encoder where the circuit can not work properly, for the binary encoder, there may be no sound failure, or the volume off the situation.
Solutions to Binary Encoder Failures
The biggest failure of the binary encoder is the rotation noise, through the cleaning process can be repaired, the specific method is: folding method so that pure alcohol (termed ethanol) cleaning fluid flow to the carbon film inside the absolute value encoder, constantly rotating the turnstile, is to make the contacts in the carbon film sliding, to achieve the purpose of cleaning the carbon film and contacts. This kind of cleaning can be carried out in the case of energized. It should be noted here that pure alcohol must be used. Then turn the handle and try to listen to the size of the noise, and guide it until the noise disappears. Specifically how to make the cleaning solution flow to the carbon film
1. For binary encoders of the straight slide type: they should be dripped in through the slit out of the joystick.
2. For binary encoders that have no way of flowing in from the outside: the potentiometer can be opened and then cleaned.
3. For absolute value encoders with large gaps at the pins: naturally drop in from the pin gap out.
4. For absolute encoders with large gaps at the turnstile: it can be dripped from the turnstile gap.
Binary Encoder Detection Methods
A binary encoder resistance measurement method: binary encoder resistance measurement is divided into in-circuit measurement and disengagement measurement. As a result of the general absolute value encoder pins with leads connected to the circuit on the circuit board, weld down the lead is more convenient, the fault with the method of measurement of disengagement, so that the results of the measurement is accurate enough to illustrate the problem.
1. Measure the resistance between the two fixed pins. Absolute encoder manufacturer determines the code by the mechanical position, it does not need to memorize, no need to find the reference point, and do not have to count all the time, when you need to know the position, when to read its position. In this way, the anti-interference characteristics of the encoder, the reliability of the data is greatly improved. Its resistance value should be equal to the nominal resistance value on the shell of this absolute encoder, much larger or much smaller than the nominal resistance value are indicative of a problem with the binary encoder.
2. Detect the change of resistance value. With a multimeter ohm file corresponding range, a meter stick on the moving piece, another meter stick on the fixed piece, slowly rotate the binary encoder left and right handle, the pointer indicates the resistance value should be from zero to the maximum value, and then from the maximum value to zero continuous change. The deflection of the pointer should also be continuous, i.e., there should be no jumping of the pointer.
Second, the binary encoder audition detection (check and test) method: this method is mainly used for volume absolute encoder and tone absolute encoder noise fault detection. Let the circuit is in working condition, and then rotate the binary encoder handle left and right, so that the moving piece contact slides on the carbon film. If there is a creaking sound in the speaker when rotating, then the binary encoder has a rotating noise fault, on the contrary, if there is no noise, it means that the binary encoder is basically good.
Generally, a volume absolute encoder or a tone absolute encoder will more or less fail to rotate noisily after being used for a certain period of time, if the carbon film is damaged due to friction between the contact points of the movable piece and the carbon film, so that the contact between the movable piece and the carbon film is poor. ssi signal converter display method and apparatus for converting signals used to drive a display, and a display using the same The invention relates to methods and apparatus and a computer program for driving a display comprising a pixel array and a computer program. pixel arrays.The present invention relates to methods, apparatus, and computer programs for driving a display comprising a pixel array. The most common form of pixelated color display today is the color liquid crystal display.
After the binary encoder is cleaned, the noise will disappear completely. At this time, in order to minimize friction, it is best to put in another drop of lubricant on the carbon film, which will also increase the service life of the absolute encoder. Multi-turn absolute encoder If you want to measure the rotation more than 360 degrees range, you have to use multi-turn absolute encoder. Encoder manufacturers use the principle of clock and watch gear machinery, when the center of the code disk rotation, through the gear drive another set of code disk (or multiple sets of gears, multiple sets of code disks), in the single-turn encoding on the basis of an increase in the number of laps of coding, in order to expand the encoder's measurement range, such absolute encoder is known as multi-turn absolute encoder, which is the same by the mechanical position of the determination of the code, the code of each position is unique and not repeatable, and There is no need to memorize. In addition to the above methods, the use of binary encoder is the attention of the place is also necessary to know.
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