Automatic tension control device for printing

Abstract

The invention discloses an automatic tension control device for printing. The device comprises a printing box, a control box, a bottom plate, a support, a roller, a motor, printing paper, a tension sensor, a detection roller, a baffle, supporting rods, connecting pieces, rotating rods, a groove and a dust cover. According to the automatic tension control device for printing, the supporting deviceis arranged between the roller and the detection roller, the supporting device is composed of the baffle, the supporting rods and the rotating rods, a rotating bolt is arranged in one supporting rod,the connecting pieces are arranged in the middle of the other supporting rod, the two rotating rods are supported on the top surface of the baffle; during printing, the printing paper is discharged from the roller, penetrates through the two rotating rods, and then enters the printing tank through the detection roller, due to the fact that a certain distance exists between the roller and the detection roller, the rotating rods can fix the printing paper, the error caused by the tension of the detection roller due to the gravity of the paper can be prevented, the error of tension control can bereduced, and the service life of the detection roller can be prolonged.

Description

technical field [0001] The invention relates to an automatic tension control device for printing. Background technique [0002] Automatic tension controller is mainly composed of tension detector, high-precision A / D, D / A converter, high-performance single-chip microcomputer and so on. The automatic constant tension controller is based on the comparison between the tension of the coil measured by the tension detector and the set target tension, and automatically adjusts the D / A output through the PID operation of the single-chip microcomputer to change the magnetic powder clutch, the excitation current of the brake or the servo motor. It can be widely used in various occasions that require precise measurement and control of tension, and has flexible use and wide applicability. [0003] However, the existing automatic tension control device still has certain defects in use. Although the existing tension control device can detect the magnitude of the tension and send the signa...

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Problems solved by technology

[0003] However, the existing automatic tension control device still has certain defects in use. Although the existing tension control device can detect the magnitude of the tension and send the signal to the motor to control the speed of the motor, due to the roller installed at one end of the motor and the detection There is a certain distance between the rollers. When the printing paper passes through the detection roller, due to its own gravity, it will bring a certain error to the tension sensor and affect the judgment of the sensor. If the bearing of the detection roller is damaged, the device will malfunction. , when the printing paper is printing, dust or paper powder on the surface will fly into the bearing, which will easily cause the bearing to get stuck and cannot be used normally.

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