What do phase A, phase B and phase Z of the encoder refer to?

Encoder manufacturerIt shows that the encoder has only the concept of phase A, B and Z. Phase A, B and Z are the channel output signals of the encoder, and the so-called phase U, V and W are the three-phase main circuit supplies of the AC motor mains.

In the encoder's A-phase, B-phase and Z-phase signals, the signals of A and B channels are generally quadrature pulse signals; while the Z-phase is a zero-pulse signal. General encoder output signal in addition to the A, B two-phase, every revolution also output a zero pulse Z. When the spindle rotates in the clockwise direction, the output pulse A channel signal is located before the B channel; when the spindle rotates counterclockwise, the A channel signal is located after the B channel. Thus, it can be judged whether the spindle is rotating positively or negatively. In addition, the encoder sends out one pulse for every one week of rotation, which is called the zero pulse or marking pulse, and the zero pulse is used to determine the zero position) or marking position. To measure the zero pulse accurately, the zero pulse is output as a high combination of the two channels, regardless of the direction of rotation. Due to the phase difference between the channels, the zero pulse is only half the length of the pulse.

Encoders with U, V and W phases should be encoders.

Phases A and B are two trains of pulses, either sinusoidal or square waves, which differ in phase by 90 degrees, thus measuring both the speed and the direction of rotation of the motor. Binary Encoder Binary is made up of two numbers, 1 and 0, which can represent two states, on and off. All any information entered into a computer is eventually converted to binary. Currently the universal code is ASCII. The most basic unit is bit. pull rope displacement sensor is also known as pull rope sensor, pull rope sensor, pull rope electronic ruler, pull rope encoder. Pull rope displacement sensor is a linear displacement sensor in the structure of the delicate composition, fully combines the advantages of the angle sensor and linear displacement sensor, to become a small installation size, compact structure, large measuring stroke, high precision sensors, the stroke from a few hundred millimeters to more than a dozen meters, ranging from a few hundred millimeters to a dozen meters. z-phase is the reference pulse, every revolution output a pulse, the pulse width often accounts for only 1/4 cycle, the role of encoder It is used for self-calibration, so that the encoder can be used normally even when there is a power failure or loss of pulses.

ABZ is the position signal of the encoder, and UVW is the magnetic pole signal of the motor, which is generally used for synchronous motors; AB for TTL/HTL encoders, the AB phase is very much more than one per revolution according to the subdivision degree of the encoder, but there is only one per revolution for the Z phase; the phase difference between the UVW magnetic pole signals is 120 degrees, which is rotated along with the angular rotation of the encoder, and it can be said that there is no direct relationship between the ABZ There is no direct relationship between UVW and ABZ.