Incremental encoder is converting displacement into cyclical electrical signals, then convert the electrical signals into count pulse, with the size of the displacement of the number of pulse said.
Incremental encoder rotation pulse signal from a circle, the users with the corresponding equipment according to the pulse data to calculate distance, displacement, speed, Angle.
The encoder is the angular displacement or linear displacement is transformed into electric signal of a device.
Contact output, using brush a brush contact conductive area or insulation area to represent the state of the code is' 1 'or' 0 ';
Acceptance of non-contact sensor is photosensitive components or magnetic sensor, using photosensitive element to pervious to light and opaque to represent the state of the code is' 1 'or' 0 '.
Incremental encoder by A central shaft of light code disc, on which there are circular and dark scribed line, have read photoelectric emission and receiving devices, obtain four groups of sine wave signal into A, B, C, D, each sine wave 90 degree phase difference (
Relative to a cycle of 360 degrees)
, C, D will signal the reverse, superimposed on A and B two phase, can strengthen stability of signal;
Every turn output another Z pulse to represent a zero reference.
Because of A, B two phase difference of 90 degrees, but only through A phase in the former or B phase in the former, with forward and inversion of discriminant encoder, through the zero pulse, encoder zero reference can be obtained.
Rotary encoder of the encoder on the market of the material is glass, metal, plastic, glass encoder is in the deposition of thin scribed line on the glass, its thermal stability, high precision, metal encoder directly to pass and impassability scribed line, not easy to be broken, but due to the metal has a certain thickness, the precision is limited, its thermal stability is an order of magnitude worse than glass, plastic encoder is economical, its cost is low, but the accuracy and thermal stability, life is less.
The resolution of rotary encoder is included in every 360 degrees how many pass or dark scribed line called resolution, also known as the analytical index, or say how many line directly, generally at every turn dividing line 5 ~ 10000.
Shanghai electronic products is 27 years old, encoder manufacturers, specializing in the production of various types of rotary encoder, electronic research and development production of magnetoelectric encoder is magnetoelectric rotary encoder, according to the needs of customers to make incremental encoder or absolute encoder.
Price higher than that of photoelectric encoder, magnetoelectric encoder is widely used in robot, automatic production lines, automatic assembly machine, elevator, textile machinery, sewing machinery, packaging and printing machinery, CNC machine tools, mapper and Angle measuring instrument, etc.
Magnetoelectric encoder also can be in PLC application as the high speed signal input element, make PLC more quickly and accurately implement the closed-loop control.
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