The synchronous control of the circular mesh and the guide belt is the core of the entire independent transmission, and its control mode is the synchronous control mode of following between the master and slave of the circular mesh and the guide belt. Its nucleus
The heart controls the circular mesh drive motor to operate synchronously with the guide belt in a certain proportional relationship, requiring all circular mesh motors to maintain the same positional relationship at all times. After the encoder signal installed on the tape guide enters the control system, it is divided by an electronic gear and then overlaid with the interpolation signal to control the circular mesh drive stepper motor or servo motor. It is required that the real-time processing from the signal collected by the encoder to the output must be high, otherwise there will be poor accuracy and speed fluctuation. At the same time, it is required that the operation and parameter settings be convenient, and there are basically three ways to achieve them.
(1) Using a microcontroller system, it is often developed in conjunction with specific applications, usually as a dedicated device, typically using 8051 series microcontrollers, DSP digital signal processors, or ARM chips. Its characteristics are: dedicated, confidential, with its own intellectual property rights, convenient software/hardware changes, and low cost. The disadvantages are: difficult development, long cycle, stability needs to be tested, specialized talents are required, and human capital is high.
(2) Adopting a programmable logic controller (PLC) system, its characteristics are: good universality, stability, good development platform (ladder diagram/logic language, etc.), greatly reducing the cycle time and saving labor costs when developing application programs. The disadvantages are: intellectual property does not belong to the user, poor confidentiality, and functions cannot be changed by the user; Due to the slow speed and poor real-time performance of the scanning execution program, it generally lacks complex motion control functions, and the control accuracy is not very ideal.
(3) Adopting a motion controller system, specifically designed to control motion components to complete complex motion trajectories and programs, the logic control function is its auxiliary function. Its characteristics are: high-speed, high-precision control, complex mathematical models and algorithms, optimized trajectory control, modular control functions; A great programming and debugging platform that can be combined with various software to control various motion components (servo motors, stepper motors). It is convenient for secondary development and generally has good confidentiality methods. The disadvantages are: high cost, requiring developers to have a high level of expertise, and functionality cannot be added arbitrarily by users.
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