High power dc governor production

High speed development in industrial equipment today some past import in the use of the equipment for a period of time will appear the aging such as a Taiwan JHML-T1000 type wet compound machine of the original of the microcomputer control system, with various kinds of interface card (signal acquisition input card, all kinds of output control card, tension control board, display card, etc.) and distributed control structure of the bus

High power dc governor making 1

High power dc governor making 2

. For ages ago and the effect of the production environment and not to the production process to implement effective tension control, cause the system stability. That makes the product quality and output decline. Tension control is the core of the whole machine, is also affecting the quality of products of the main factors. In a composite process, tension control proper, won't produce vertical or horizontal folds, material itself will not happen plastic deformation. In the printing process, as long as the tension stability, printing the alignment precision and scrap rate is very easy to control. The higher the machine speed, tension control is more important. To get high quality products, it must be equipped with the function is perfect tension control system. Therefore, to the compound machine tension control system for the comprehensive technical transformation: with PLC as the core of the control system replace original of the microcomputer control system of the equipment, in order to control the tension of stable and reliable, and meet the needs of the production process.
1 system is introduced
Compound machine tension control system structure as shown in figure 1 below. The whole system is divided into put volumes, tension control and composite, driven printing and winding active control two parts.

1.1 put volumes tension control follower
Put a roll tension control into two phases, namely the paper materials and compound roll the tension between control and aluminum foil composite materials and roll the tension between control. Put all use passive when roll of constant ZhangLiFang volume, so put roll process with the decrease of the coil diameter, tension to keep basic constant, let the magnetic powder brake by adjusting the transmission torque to meet the requirements of the tension constant. At the same time as the two paragraph distance is short, so the setting of the initial value of tension to small. Note the material, the heavier volume, the greater the tension; put roll Same coil diameter, material is wider, the greater the volume of tension.
1.2 composite-print-rewinding tension control
Composite-print-rewinder tension is compound roll by, printing roll and rewinding the speed difference between rollers, cause. In a composite machine, adjust the compound roll motor, printing roll motor and stacking of motor speed roller to adjust output this part of the tension. In addition to the influence of the poor by speed, but also to the actual adjustable rate base material, thickness changes, drying temperature, GaoSao area length, strip of other factors, such as the transmission speed. If the expansion rate base material, the greater the tension in the more easily under, so different material should be aimed at the base material of appropriate adjustments rectifier output, poor, and change speed to get a proper tension value. If the base material thickness not even, compound roll and printing roll stress is caused by the fluctuation, the speed of change, also influence the tension. If this part of the tension is too small, can appear drape, and even damage accumulation phenomenon. But also can not be too big, too much tension strip distortion, appear even longitudinal wrinkles.
2 system solutions
According to industrial computer system division interface card original, the defects of the structure with PLC as the core of the tension control system, digital input and output the CPU226 own input/output and the digital quantity EM221 expansion module of 8-channel input and EM223 16 road input/output 16 road implementation; The analog input EM235 module, analog output using EM235 module and EM232 module. The whole system structure diagram shown in figure 2. 2 sets of magnetic powder brake control process of tension, put volume 4 way to realize the tension tester each detecting input, 3 tension a dc speed regulationg equipment to 3 sets of dc motor control, drag the complete system by PLC control logic.

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High power dc governor making 2

System hardware
In the design of the tension control system, the Siemens s7-200 PLC as small as control core logic, through to its control compound machine production process each link. Through to the magnetic powder brake and dc motor control, realize the drag the production process of constant tension control. According to process flow, the order of composite tension control system can also be divided into the following according to different process four parts to deal with.
3.1 put volumes control
1, put roll process structure
Put a roll of tension control process into two phases: paper material and compound roll the tension between control and aluminum foil composite materials and roll the tension between control. Put the passive ZhangLiFang roll constant volume, so put roll process with the decrease of the coil diameter, tension to keep basic constant, let the magnetic powder brake by adjusting the braking torque to meet the constant tension. Tension sensor detection load, after tension signal amplifier tension after to controller,. Comprehensive given and feedback controller, the output control signal, tension by power amplifier drive magnetic powder brake function to scroll, form the tension closed-loop control system.
2, input/output signal
Put a roll process input/output signal flow as shown in figure 3 below. Packed in induction roller tension on both ends of the tension sensor induction into the pressure voltage signal and amplified into 0 ~ 10 V standard input signal, PLC analogue inputs mouth. In the tension control process, a given value and feedback value comparison, get a tension deviation e (t), is the way to calculate procedures PID control quantity to u (t), the power amplifier drive after magnetic powder brake to control the brake, and then control the size of brake current brake braking torque output, so that put volumes tension maintain in a certain range, realize the constant tension.

3.2 joint control
Paper material and aluminum foil material after release of volumes, in the role of the traction, respectively to strip form after guide roller. In the joint operation, first is must carry on the coating. Coating is the material with similar to bring the chemical substances, such glue to joint. The paper after coating materials and aluminum foil materials in traction under the action of roller, in the joint into joint roller and joint rounds of pressure and coated glue dual role, the paper material and aluminum foil material is tightly glued together, finish joint process. Joint process is the open loop to PLC. But dc governor and dc motor is between the speed and the current double