7. Wetting system, can be configured with traditional dampening (standard configuration) or alcohol dampening (optional configuration) system.

1) Traditional dampening device

* Relying on the plate water roller, the number is 2, and the pressure of the plate water roller on the string water roller and the printing plate can be adjusted separately. The working state is controlled by logic program and cylinder. However, the man-machine interface and each color group can be realized by the three-position switch (automatic, manual and prohibited).
* The water bucket roller is driven by a separate motor, frequency conversion speed regulation.
* Equipped with circulating water tank to realize automatic circulating water supply.

2) Alcohol dampening device (optional configuration)

* It is composed of five rollers, water bucket roller, metering roller, water loading roller, string water roller and intermediate roller.
* The water bucket roller of each color group is driven independently by a motor, and the frequency conversion speed adjustment is implemented to automatically track the working speed of the host. You can also fine-tune the water amount of each color group on the man-machine interface according to the needs of the use, and you can also manipulate it through the color group The side acceleration button enables quick water supply.
* The pressure between the metering roller, water bucket roller and water roller; water roller and water roller and printing plate; the pressure between the middle roller, water roller and first ink roller can be adjusted and controlled.
* The working state of the system is controlled by logic program and cylinder. However, in the man-machine interface and each color group, the working requirements of the color group can be realized through the three-position switch (automatic, manual and prohibited).
* The system can realize the conversion between the pre-wetting state, working state, water separation and cleaning state.
* Centralized water supply, composed of central wetting water tank, circulating water supply and water cooling device, alcohol ratio measurement and control device. The PVC water pipe is covered with thermal insulation on the outside of the water pipe and the bucket.
* The water bucket is equipped with a liquid level detector.

8. Main drive

* Frequency conversion speed regulation braking three-phase asynchronous motor: 1480r / min.
Main motor power: two-color machine 7.5kW, four-color machine, five-color machine 15kW.
Frequency. Maximum machine speed: 12000 sheets / h; running speed: 3000r / h,
Jog speed: 400r / h.
* Multi-peak wedge belt transmission.

Nine, take-up unit

* Fully enclosed paper receiving chain guide. The lubrication of the guide rail adopts the oil cup refueling method.
* Tooth bite, box-shaped structure, each bite tooth gets its bite force through its own torsion spring.
* The suction roller of the paper retarder (paper reducer) is driven by the motor alone, and the speed is controlled by frequency conversion. The working position can be adjusted according to the size of the printing paper, the adjustment range: 393mm-540mm.
* The 12 axial fans are arranged in a 3 × 4 array, and the air volume from the middle to the side edges is adjusted symmetrically.
* High-level paper collection, the maximum height of the stack is 780mm.
* Receiving paper without stopping the machine, inserting the rack manually to operate, the insertion rack touches the limit switch to ensure the smooth progress of the work.
* Sampling device.
* Paper unwinding device.
* Electrostatic powder sprayer.
* Static eliminator.
* Centralized control panel and touch screen man-machine interface for paper collection operation.

Ten, lubrication

The lubrication of the machine uses a combination of different lubrication methods:

* The rain-type lubrication method is adopted for the serial control mechanism and the roller transmission gear in the transmission side cover. The roller support bearing group adopts grease lubrication.
* Partial lubrication point lubrication can realize fixed point, timing and quantitative automatic lubrication through the lubrication work station. The working time interval of the oil pump is set through the special page of the man-machine interface.
* Some lubrication points are manually lubricated according to the instructions.

11. Security Settings

* Each main operating station is equipped with a safety interlock switch (head switch).
* Each rotating part is provided with a safety shield to realize electrical linkage protection.
* There are two-step footboards on both sides of the machine, and its width:
The control side is 620mm and the transmission side is 600mm.

Twelve, electrical control system

The human-oriented design concept, such as man-machine interface, ink color remote control system, dampening control system, register control system and other operation interfaces and digital transmission control system, etc., have improved the automation degree of the machine and the level of electromechanical integration. It has left a vast space for future product upgrades.

1) Digital control

* PLC programmable logic controller is used to realize automatic program operation and logic control of electronic paper and roller clutch pressure. PLC programmable controller selects Japanese "Mitsubishi" company products.
* Position control of the whole machine through digital encoder.
* Digital communication with multiple frequency converters, alcohol dampening motor can track the working speed of the host, digital proportional speed regulation, and the working speed can also be set independently.
* Main motor, dampening motor and retarder motor reducer frequency control. The inverters are all selected from Japan's "Mitsubishi" company products.

2) Set up a man-machine interface window (four-color machine is equipped with a central console) to realize man-machine dialogue, Chinese menu, can display the printing status, process control and related data. Can achieve:

* Preset function, preset job data on touch screen.
* Printer control, set various working parameters of the machine, can complete the machine printing control, and can fully display all the status of the machine.
* Real-time monitoring, real-time monitoring of various operating conditions of the printing press, and manual intervention, real-time online modification.
* Diagnosis function, quickly diagnose machine faults, and suggest solutions.
* Ink zone control (optional configuration), accurate ink distribution for each ink zone. Enable the fine-tuning function to make the prints more fine.
* Inking control, computer controlled ink fountain roller injects ink accurately according to the percentage you set.
* The dampening control, the water roller and the printing machine achieve synchronous proportional follow-up, providing stable water-ink balance conditions.
* Registration control, the correction motor makes axial and circumferential adjustments to the plate cylinders of various groups, with an adjustment accuracy of ± 0.01 mm.
* Cleaning control. After the printing operation is completed, the ink is quickly closed, which makes the cleaning operation of the printing machine simple, convenient and fast.

3) The system also has the following functions:

* Super value storage function, can store thousands of job data for recall at any time.
* Remote monitoring function, connect the printing machine to our service network through modem to realize remote monitoring and instant service.
* Expansion function, reserved digital pre-press interface for easy upgrade.

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