Absolute encoder noise how to repair

　Household appliances in the absolute value encoder due to frequent use (such as recorders in the volume of the absolute value encoder is often repeated spinning), the use of a period of time is prone to failure. Absolute value encoder failure is relatively easy to produce in the machine on the performance, such as rotating the absolute value encoder when the noise is very large, the sound is big and small, power switch failure, etc., then the need for absolute value encoder maintenance and repair.

　　Carbon film and synthetic binary encoder application after a period of time is most likely to fail is noisy (especially non-sealed absolute encoder with switch), the main reason is the contact between the reed and the lead terminal reed oil stains, dirt, or resistance film is worn (a basic type of component failure) so that the contact resistance is not stable (explanation: solid stability; no change). Rope displacement sensor in accordance with the readout encoder can be divided into contact and non-contact two kinds. Contact with the brush output, a brush contact conductive area or insulated area to indicate the state of the code is "1" or "0"; non-contact acceptance of the sensitive element is a photosensitive element or a magnetic element, the use of photosensitive elements to the light-transparent and opaque areas to indicate that the state of the code is "1" or "0"; non-contact acceptance of sensitive elements are photosensitive elements or magnetic elements, photosensitive elements with light-transparent and opaque areas to indicate that the state of the code is "1". The state of the code is "1" or "0".

This can be repaired by following the steps below:

　　1. Use a screwdriver to pry open the metal housing of the absolute encoder and remove the metal shielding case;

　　2, with tweezers dipped in anhydrous alcohol (termed ethanol) (or with a high grade gasoline) cotton balls, gently flick the resistor sheet, sieve friction generated by the carbon powder and dirt, and then use a small cotton ball to remove the contact reed and lead to the reed connection of the oil stains. Absolute encoder photocode disk has many channels of light channel engraved lines, each engraved line in order to 2 lines, 4 lines, 8 lines, 16 lines of the arrangement, so that, in each position of the encoder, by reading each channel engraved line of the pass, dark, to obtain a set of unique binary code (Gray code) from the zero power of 2 to the n-1 power of 2, which is known as the n-bit absolute encoder. Such an encoder is memorized by a photoelectric code disk. Some absolute encoders have a rubber wood frame that contacts the reeds that can be removed from the rotating shaft earth, which makes it easier to remove oil stains dirt and toner from the reeds and resistor pads;

　　3, cleaning is completed and then installed in accordance with the original steps, the repair work is completed.

　　The above repairs are not always effective, and absolute encoders with severe wear (a basic type of component failure) need to be replaced with new ones. Waterproof encoder is a signal or data preparation is converted into a usable form of communication, transmission and storage of the device, the angular displacement or linear displacement into an electrical signal, the former is called the code disk, the latter is called the code scale. The signal output of the encoder includes sine wave, square wave, open collector, push-pull and many other forms. When replacing, it is best to use the original model number and the original resistance value of the absolute value encoder, and should pay attention to the length of the absolute value encoder shaft and its cross-sectional shape, should be able to cooperate with the original knob. When the original model and the original resistance value absolute encoder cannot be found, the appropriate model can be used as a substitute.