The relationship between exercise controller, sports control card, PLC, CNC

Movement control mainly involves the control of step motors and servo motors. The control structure mode is generally: control device+drive+(step or servo) motor. The control device can be a PLC system or a dedicated automation device (such as a motion controller, a motion control card). When the PLC system is used as a control device, although it has the flexibility and certain versatility of the PLC system, it is difficult to achieve or programming when the requirements of high accuracy (such as interpolation control) and sensitive reactions, and the cost may be higher. Essence With the advancement of technical progress and technical accumulation, the movement controller came into being. It solidified some universal and special motion control functions in it (such as interpolation instructions). Users only need to configuration, call these functional blocks or instructions This reduces the difficulty of programming, performance, cost and other aspects.

It can be understood like this: The use of PLC is not limited to CNC, just an ordinary motion control device. Movement controller is a special PLC that is used for sports control. CNC is the abbreviation of computer digital control machine tools (Computer Numerical Control, that is, CNC machine tool), and is a automated machine tool controlled by program control. CNC's motion control device was basically PLC before, but most of the high -performance CNCs used motion controllers.

CNC's CNC CNC device has built -in PLC. PLC is a programmable controller, which is not only applied to CNC machine tools. It is used in industrial equipment, production lines, and automated devices. The application is quite wide. Movement controller: Movement control is a branch of automation. It uses some devices called servo mechanisms such as hydraulic pumps, linear executors or motors to control the position and/or speed of the machine. The application of motion control in the field of robots and CNC machine tools is more complicated than applications in dedicated machines, because the latter movement is simpler and is usually called general motion control. Movement control is widely used in packaging, printing, textiles and assembly industries. The basic architecture of a motion controller includes: a motion controller is used to generate a trajectory point (expected output) and the feedback ring of closed positions.

Many controllers can also close a speed ring internally. A driver or amplifier is used to convert the control signal (usually speed or torque signal) from the motion controller (usually speed or torque signal) to a higher power current or voltage signal. More advanced intelligent drivers can close the position ring and speed ring itself to obtain more accurate control. A actuator such as hydraulic pump, cylinder, linear executor or motor is used to output motion. A feedback sensor such as photoelectric encoder, a rotary transformer or Hall effect device to feedback the position controller of the feeder to the position controller to realize the closure of the control ring. Many mechanical components are used to convert the movement of the actuator into the expected movement. It includes gearboxes, shafts, roller screws, tooth bands, coupling, and linear and rotating bearings. Generally, the function of a motion controller includes: speed control point control (point to point).

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