Stepper motor is a kind of motor dedicated to controlling precision displacement and large-scale speed regulation. Its rotation is operated step by step according to its inherent step angle (determined by the mechanical structure of the rotor and stator). It is characterized by each rotation. In one step, the step angle is always the same, maintaining a precise and accurate position. So no matter how many times you rotate, there is always no accumulation error. Because of the simple control method and low cost, it is widely used in various open loop control. The operation of the stepper motor requires a pulse-distributed power type electronic device to drive, which is the stepper motor driver. It receives the pulse signal from the control system, distributes the pulses in sequence according to the structural characteristics of the stepper motor, and realizes the control angular displacement, the rotational speed, the rotational direction, the brake loading state, and the free state. Each time the control system sends a pulse signal, the stepper motor can be driven to rotate by one step angle by the driver. The speed of the stepper motor is proportional to the frequency of the pulse signal. The amount of angular displacement is related to the number of pulses. When the stepper motor stops rotating, it can produce two states: the brake load can generate the maximum or partial holding torque (commonly called brake hold, no electromagnetic brake or mechanical brake) and the rotor is in a free state (can be externally thrusted) Drives easy rotation). The stepper motor driver must match the model of the stepper motor. Otherwise, the stepper motor and driver will be damaged.
Ethernet cables connect devices such as PCs, routers, and switches within a local area network.Most technicians refer to these standards as CAT5 and CAT6, respectively. Also CAT3 available. Because of this, many online stores that sell network cables use this abbreviated language as well.
The connector can by shield or non-shield type, raw cable can be UTP, STP, FTP type. Also the molded shape can be custom mould by straight, right-angle, 105 degree, etc.
These physical cables are limited by length and durability. If a network cable is too long or of poor quality, it won't carry a good network signal. These limits are one reason there are different types of Ethernet cables that are optimized to perform certain tasks in specific situations.
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