How can I buy an encoder?

1. Buying a coder can help you!

2. You can help without buying a coder.

1. Photoelectric encoder is a sensor that converts the mechanical geometric displacement on the output shaft into pulse or digital quantity through photoelectric conversion.

This is the most widely used sensor at present, and the optical encoder is composed of a grating disc and a photoelectric detection device. The grating disc is to open a number of rectangular holes in equal parts on a circular plate of a certain diameter. Because the photoelectric code disc is coaxial with the motor, when the motor rotates, the grating disc rotates at the same speed with the motor, and a number of pulse signals are detected and output by the detection device composed of electronic components such as light-emitting diodes, and the schematic diagram of its principle is shown in Figure 1;

By calculating the number of pulses output by the optical encoder per second, the speed of the current motor can be reflected. In addition, to determine the direction of rotation, the disc can also provide two pulse signals with a phase difference of 90°.

According to the detection principle, encoders can be divided into optical, magnetic, inductive and capacitive. According to its scale method and signal output form, it can be divided into three types: incremental, absolute and mixed.

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It is generally available in electronic component stores.

An encoder is a device that compiles or converts signals (such as bitstreams) or data into signals that can be communicated, transmitted, and stored. The encoder converts angular or linear displacement into an electrical signal, the former is called a code disc, and the latter is called a yardstick. According to the readout method, the encoder can be divided into two types: contact and non-contact;

According to the working principle, encoders can be divided into two types: incremental and absolute. The incremental encoder converts the displacement into a periodic electrical signal, and then converts the electrical signal into a counting pulse, and the number of pulses indicates the size of the displacement. Each position of an absolute encoder corresponds to a defined digital code, so its indication is only relevant to the start and end positions of the measurement, and not to the intermediate process of the measurement.

Encoders include absolute encoders and incremental encoders, and absolute encoders can provide actual position information of the motor or load; Incremental encoders generally use quadrature signals to obtain the position change of the motor and the direction of the motor through the sequence or number of pulses of the AB signal.

An encoder is a rotary sensor that converts rotational displacement into a series of digital pulses that can be used to control angular displacement and, if combined with a gear bar or spiral screw, can also be used to measure linear displacement. After the encoder generates an electrical signal, it is processed by the digital control CNC, programmable logic controller PLC, control system, etc.

These sensors are mainly used in machine tools, materials processing, electric motor feedback systems, and measurement and control equipment. In ELTRA encoders, the angular displacement is converted using the principle of photoelectric scanning.

The reading system is based on the rotation of the radial indexing dial, which consists of alternating translucent and opaque windows. The system is all illuminated vertically by an infrared light source, which projects the image on the disc onto the surface of the receiver, which is covered with a grating called a collimator, which has the same window as the disc.

The receiver's job is to feel the light changes caused by the rotation of the disc, and then convert the light changes into the corresponding electrical changes. In general, a rotary encoder can also obtain a speed signal, which is fed back to the inverter to adjust the output data of the inverter.

Working principle: by a central shaft photoelectric code disc, on which there is a ring through, dark line, there is a photoelectric transmitting and receiving device to read the beam to take, obtain four groups of sine wave signals combined into a, b, c, d, each sine wave difference of 90 degrees (relative to a cycle of 360 degrees), the c and d signals are reversed, superimposed on a and b phases, can enhance the stable signal; A z-phase pulse is also output per revolution to represent the zero reference bit.

Since the difference between phase A and phase B is 90 degrees, the forward and reverse rotation of the encoder can be determined by comparing phase A in front or phase B in front, and the zero reference bit of the encoder can be obtained through the zero pulse.

The materials of the encoder code disc are glass, metal, plastic, the glass code disc is deposited on the glass with a very thin engraved line, its thermal stability is good, the precision is high, the metal code disc is directly engraved with and without the line, not fragile.

However, due to the fact that the metal has a certain thickness, the accuracy is limited, and its state is slow and the thermal stability is an order of magnitude worse than that of glass, and the plastic code disc is economical, and its cost is low, but the accuracy, thermal stability, and life are poorer.

A rotary encoder switch is an electronic component that generates an electrical signal through a rotating runner that is used to adjust device parameters or perform specific actions. It is usually used for volume control, screen brightness adjustment, menu option selection, game control mode answering system, etc. At present, rotary encoder switches are usually used in the industrial field and small household appliances.

The rotary encoder is mainly used to control the rotation parameters of the device, such as the volume of the audio device, etc. It usually consists of a knob and a dial that controls the amplitude of rotation. The user can control the operation of the device via a rotary knob and then determine the specific settings based on the marker rent mark on the dial.

The encoder switch is a very convenient and practical switch that can help users easily control the functions of various electronic devices.

The main purpose of rotary encoders is to measure the rotational speed and displacement of objects, and to have a counting function.

Encoders compile signals (e.g., bit streams) or data into signals that can be communicated, transmitted, and stored.

Classified according to the way the disc is engraved:

1) Incremental type: that is, every time the angle of the unit is sent out a pulse signal (there is also a sine and cosine signal, and then it is subdivided, and the pulse with a higher frequency is chopped), usually the output of phase A, phase B, phase Z, phase A and phase B are the pulse output of 1 4 cycles of mutual delay, and the forward and reverse rotation can be distinguished according to the delay relationship, and the rising and falling edges of phase A and phase B can be multiplied by 2 or 4 times; The z-phase is a single-turn pulse, i.e., one pulse is emitted per turn.

2) Absolute value type: that is, it corresponds to a circle, and the angle of each reference emits a unique binary value corresponding to the angle, and multiple positions can be recorded and measured by an external lap device.

An encoder is a device that compiles or converts signals or data into signals that can be communicated, transmitted, and stored.

The encoder converts the angular displacement or linear displacement into an electrical signal, the former becomes a code disc, and the latter is called a yardstick According to the readout method, the encoder can be divided into two types: contact type and non-contact type The contact type uses brush output, and a brush contacts the conductive area or insulating area to indicate the state of **"1" or "0"; The non-contact receiving sensitive element is a photosensitive element or a magnetic sensitive element, and when the photosensitive element is used, the light transmission area and the opaque area are used to indicate the state of **"1 "Still"0", passed"The binary encoding of 1" and "0" converts the acquired physical signal into an electrical signal that can be read by machine code for communication, transmission and storage.

Encoder function: used for speed, position, detection feedback. For example:

Spindle encoder: feedback the actual speed of the spindle, mainly used in the processing of threads.

Encoder on the motor: It is a feedback unit used to check how many pulses of the motor are executed, so as to achieve the function of precise positioning. Principle.

What is an encoder and how does it work? Today is a long time to see.

An encoder is a displacement feedback device that indicates the angle of rotation (and can also measure length), such as a 1000-wire encoder.

If the encoder has been rotated half a turn.

The encoder outputs 500 pulses.

If the encoder rotates 1 4 times.

The encoder outputs 250 pulses.

Different types of encoders have slightly different functions, generally speaking, encoders are devices that convert position changes into digital signals, and are often used in circuits for position detection, angle detection, rotation direction, rotation speed, etc., and are also used for general knob operation devices. It is commonly used in white goods, car navigation, audio and video products.

Encoders are used to measure physical quantities such as velocity, position, velocity, or angle. It is a sensor that converts mechanical displacement into an electrical signal, and is divided into two types: incremental and absolute. Incremental encoders generate pulse signals that can be used to measure speed, length, or position.

For absolute encoders, each position is a digital value for a displacement. Inside the encoder there is a rotating disc (code disk) with several transparent and opaque windows, and a photoelectric receiver is used to collect intermittent beams, so that the light pulses are converted into electrical pulses, which are then processed and output by the electronic output line.

How to choose the right encoder for DD motors?

Very simple, resolution of 1000, three-way signal, connected to PLC