Roundss Rotary encoder resolution and accurate output！

Resolution and accurate output
Specifies the encoder resolution, error analysis is a consideration. It is good practice to select an encoder read than the largest error source machine two to four times better resolution. The relationship between resolution and bandwidth:
Where, F = frequency, Hz • N = speed, RPM • R = resolution, every round count. System speed or by a trade-off is often dictated: If the system throughput and scrap rates. In a system error inherent resolution limitations.Roundss Rotary encoder
Use the graph or manufacturer input, engineers can determine the operating bandwidth of the system. It is composed of an output driver (line driver, open collector, push-pull or mixed), cable length and type, and the type of controller-side terminal decision.Roundss Rotary encoder

It consists of two transistors, even collectors, low impedance line driver output guaranteed. Because of their low impedance, good noise immunity, they may be used to demonstrate and 1000 feet of cable length and operating frequency of 1 MHz. However, their high switching speed so that the ringing. These should be specified as the output signal to include the channel to be carried up and shielded twisted - and fed to the high-impedance differential line receiver, or optical isolator, which provides common mode noise rejection.Roundss Rotary encoder

Because of their high impedance open collector relatively limited bandwidth. A good rule of thumb is up to 50 kHz, the maximum height of 50 feet of cable to use them. They are the cheapest type of output. Note that the pull-up resistor can be factory installed or user provided in the encoder, or both. Usually arranged by the controller encoder or under different operation than the supply voltage needs of the decision.Roundss Rotary encoder

Higher resolution does not necessarily translate into higher system accuracy, resolution but that is too low may limit the system can accurately control the speed and position. As previously implied, quadrature incremental encoders only gradually provide directional information, but up to four-fold increase when a compatible receiving device combined resolution.
Encoder output data is sent to the controller via parallel binary, analog voltage or current, Profinet and Ethernet Powerlink, Ethernet / IP, MODBUS, DeviceNet, field bus, CANopen bus, or other network. For example, the standard serial output (SSO) designs often leverage the magnetic encoder allows the continuous synchronous data transmission.Roundss Rotary encoder

This bearing magnetic encoder provides a reliable thanks monitoring sine, cosine value of the position sensor signal. Which means that the shaft attachment style remains idle for other purposes. Position with 16-bit resolution absolute output by SSI or CANopen interface optionally. In the unit shown here, an additional increment of speed feedback signal (1024~8192 steps per revolution.) Source: Baumer.Roundss Rotary encoder

This bearing magnetic encoder provides a reliable thanks monitoring sine, cosine value of the position sensor signal. Which means that the shaft attachment style remains idle for other purposes. Position with 16-bit resolution absolute output by SSI or CANopen interface optionally. In the unit shown here, an additional incremental speed feedback signal (1024~8192 steps per revolution.) Source: Baumer.Roundss Rotary encoder

Another option is a synchronous serial interface (SSI), digital point to point interface. Common in Europe, it provides one-way communication to a speed of 1.5 MHz, and the use of six-wire cable - two carrying data to the encoder clock, carrying data from two, and two wires for power. Finally, hardware and SSI compatible, connected via a bus or a point, bidirectional synchronous serial interface (BiSS Interface) is an open protocol, data transmission encoder position whenever the controller capacity to allow rapid recovery after an interruption. Furthermore, it conveys the encoder identification information, and acceleration, temperature, and other data, without interfering with the real-time operation.Roundss Rotary encoder

Note: The system controller generally dictates encoder output - so the designer should first determine the input requirements of the controller, and then select a supported encoder output driver. Three basic types is to provide a current to the external device (Procurement) driver; the driver to provide a current path to circuit ground or common (sink); both drivers have done that (line drive). Many controllers accept differential line driver signals, common-mode noise, and can accommodate long wires canceled.Roundss Rotary encoder

To ensure the reliability of the power supply to the encoder shall filtration and regulation; the power cord for other equipment away from the encoder cable. In some cases, special coatings junction box shield against electromagnetic fields compatible signal output malfunction prevention. This design of the frame and the encoder can be rotated to the right to the left or the opening Wires encoder by 180 ° on all cases, the shielded twisted pair wires are required and a proper ground connection (for ease of installation.) - Star preferably arrangements - to ensure effective shield.

Previous：Absolute encoder & incremental encoder
Next：Magnetic rotary encoder