How to make your CTP as young and long as you? Let's take a look at the environmental factors that affect the service life and imaging quality of CTP:
1. The quality of the electrical environment For electronic equipment, special attention needs to be paid to the quality of power supply. Many circuit board failures are related to the quality of power supply. The quality of the electrical environment is evaluated from the following aspects:
(1) The stability of the power supply voltage. Generally speaking, the voltage error must be within ± 10V, the peak voltage is stable, and no large peak voltage can occur. Otherwise, it is easy to burn the insurance or even burn the entire circuit board. Similarly, too small a voltage will cause damage to the device.
(2) There is a good ground wire. In general, each device is best to have a separate ground wire. The ground resistance is less than the value required by the device (generally about 0.5 ohm), and the voltage between the zero ground wires is less than the specified value. When piling and burying the ground wire, if the conductive condition of the soil is not good, the ground wire should be buried a little deeper to reduce the grounding resistance. In addition, the ground wire should not be too thin and the conductivity is better.
(3) When the power of the device is large, you should choose a power cord with high power. And use the air switch control, do not use the socket to access, because the contact performance of the socket is not as good as the air switch.
(4) When choosing a regulated power supply or a USP uninterruptible power supply according to the requirements of the equipment, pay attention to the choice of power. Too little power will have a greater impact on the equipment.
If the mains power is often accidentally interrupted, it is best to connect the server to the USP uninterruptible power supply. Unexpected power interruption will cause great damage to the server's hard disk, which may directly damage the hard disk and cause data loss.
2. Both the water supply quality punching machine and the punching machine need water. The quality of the water will affect the operation of these devices. Water quality includes many factors: water hardness, pH, purity, water pressure, etc. If the hardness of the water is too large, it is easy to cause calcification of the rubber roller; the acidity and alkalinity of the water affect the corrosion rate of the equipment; purity refers to the cleanliness of the water, there are many impurities in the water, and the impact of the film and the plate is very large. There are trachoma, dirty spots on the printing plate, and the CTP printing plate has reduced durability. Water pressure is also an important factor. If the water pressure of the CTP plate is too small, it will lead to insufficient rinsing, and the developer will remain on the plate to continue to function, resulting in a decline in the quality of the plate. In addition, organic organisms in the water will also affect the maintenance of the equipment, a large number of microorganisms multiply, and the sink is easy to get dirty.
The methods to improve water quality are mainly filtration treatment and pressure treatment. When the water quality is poor, it must be filtered, and the filter element should be cleaned and replaced frequently; when there is insufficient water pressure, it is best to use a booster pump to increase the water pressure.
3. A common example of temperature is that when the temperature is too high in summer, the computer is prone to freeze. Temperature mainly affects the operation of electronic components. There are chips in the main board of the prepress equipment. When the temperature is too high, it will malfunction, the work will become unstable, and even the chip will be burned. Of course, the temperature is too low is not suitable for the work of electronic and electromechanical equipment.
There are two requirements for temperature: one is that the ambient temperature for normal operation must be within the range required by the equipment, generally 21 ℃ to 25 ℃ is most suitable; the second is that the temperature change rate should not be too large, generally less than 2 ℃ per hour. Especially in winter, when the temperature rises in a short time, it is easy to condense the water mist and burn the circuit board. It is recommended to keep the room temperature unchanged when the equipment stops working in the winter night, otherwise the equipment's loss cost will be much greater than the saved heating cost.
4. Humidity As mentioned above, abnormal humidity can easily lead to the failure of imagesetter. In addition, humidity will affect the service life of the equipment. If the humidity is too low, the static electricity generated by friction is not easy to take away, it is easy to damage the electronic components, and it will cause the performance of the film to change, causing the failure of the imagesetter. It becomes a path, and water mist is easily condensed on the equipment and optical devices, which can damage the equipment.
The normal equipment humidity condition is 50% -60% RH, and people can feel suitable under this humidity. In addition, the change in humidity should also be less than 5% RH per hour. The climatic conditions in our country are basically dry in autumn and winter, and low in humidity, especially in the northern region, which requires humidification. Spring and summer have a humid climate and high humidity, especially during the rainy season in the south, dehumidification is required.
There are many types of humidifiers. It should be noted that the imagesetter and CTP do not use ultrasonic humidifiers, which have water and alkali, which are easy to form alkali on the lens.
5. Air quality Dust, oil and gas, and volatile gases in the air will have a certain impact on the use and maintenance of prepress equipment. Air quality is a factor that cannot be underestimated in the pre-press working environment requirements.
(1) Dust has a greater impact on the service life and production quality of pre-press equipment, especially on photoelectric equipment such as scanners, imagesetters, and CTP. Film output, CTP platemaking, if dust appears in the optical path of the machine, it will hinder laser exposure, resulting in white spots on the film and printing plate; when a lot of dust accumulates on the optical device, it will reduce the luminous flux, affect the output density, An error will also be reported, causing the device not to work properly. In addition, the dust in the air falls on the circuit board, and a passage is formed over time, generating capacitance and inductance effects. When the humidity of the air increases, the dust absorbs moisture in the air to form a complete passage, which burns the capacitor and resistance, resulting in the circuit board damage.
In order to reduce the source of dust, most prepress workshops have set up dust-free workshops, and they are required to take off their shoes to enter. Clean and vacuum frequently. Reduce the amount of dust in the air.
(2) Secondly, prevent oil and gas from polluting the air in the prepress workshop. If the prepress workshop is close to the printing workshop, the oil and gas in the printing workshop can easily run to the prepress workshop. Oil and gas are combined with dust in the air and adhere to the circuit board and optical devices, which will affect the work of the equipment for a long time and even cause damage to the equipment.
(3) When the liquid medicine in the tablet machine and plate processor evaporates into the air, it will change the acidity and alkalinity of the air and increase the corrosion of the air. When the exhaust effect is not good and can not take away these exhaust gases in time, it will accelerate the corrosion of the equipment and shorten the service life of the equipment. In order to ensure the air quality, the prepress workshop must be dustproof, ventilated and exhausted.
6. Vibration pre-press photoelectric equipment has strict requirements on vibration conditions. If the printing machine and post-press processing equipment are relatively close to the pre-press equipment, the ground will generate strong vibrations, affecting the pre-press equipment. When the factory building is multi-story, photoelectric equipment such as imagesetter and CTP must be placed on the floor where printing and post-press processing are located to reduce the impact of vibration.
The hazards of vibration are mainly in two aspects: first, the circuit interface may be loose due to vibration, resulting in poor contact, unstable operation of the device, and easy failure, and the cause of this failure is relatively hidden, and it is difficult to find out; second, the mechanical part of the device Rubbing each other due to vibration accelerates the loss of its components, shortens the service life, and reduces the accuracy of the equipment. Especially for precision photoelectric equipment such as electrical extensions, scanners, imagesetters, and CTP, vibration has a great influence on its accuracy, which will lead to a reduction in imaging accuracy. When installing the equipment, try to choose a working environment with less vibration.
There are three technical indicators to assess the vibration conditions: vibration frequency, maximum vibration amplitude, and vibration acceleration. The smaller the parameters of the three indicators, the better. The environmental requirements of optoelectronic equipment generally have vibration parameter index requirements, which need to be strictly implemented.
7. Ground requirements There are many aspects to the ground requirements:
(1) Flatness. Generally speaking, the ground should be as level as possible. Basically, all electromechanical equipment must work in a horizontal state. When placing imagesetters and CTP equipment, in order to facilitate the horizontal adjustment of the equipment, the ground should generally be as level as possible.
(2) Ground carrying capacity. Equipment such as electrical extensions, wide-format imagesetters, CTP, etc. are of relatively high quality. They have high requirements on the load-bearing capacity of the ground and the ground hardness must be large to ensure that the feet of the equipment will not sink for a long time in order to maintain the level of the equipment . When wood floors and skeleton floors are used on the ground, the hardness of the floor needs to be tested to determine the load-bearing capacity. If it is not hard enough, you can lay a layer of steel plate on it. For the skeleton floor, you can also use the method of brick padding to improve the bearing capacity of the floor.
(3) Whether anti-static is required. Some equipment requires anti-static floor. For this, you can lay anti-static floor or paint anti-static paint to solve; some equipment requires that anti-static floor cannot be used. This is simple, just use cement and tile floors. Ground strength Hard and strong carrying capacity.
(4) Ground height treatment. Some devices have high requirements for waterproofing, so ground padding is required. Skeleton floor can be used, but pay attention to choose different skeleton floors according to the quality of the equipment and the performance requirements of the floor.
8. Indoor environment requirements The requirements of the indoor environment depend on the specific equipment, and the main points need to be noted:
(1) The size of the room. The size of the room should be moderate, too large to facilitate temperature and humidity control and air quality control, too small to facilitate operation and maintenance.
(2) Selection of wall materials. Consider its shading degree, whether it is anti-static, and whether there is volatile gas. Choose materials according to equipment requirements.
(3) Ambient light. Some devices also require ambient light. Most equipment is required to avoid strong light.
(4) Pay attention to the surrounding electromagnetic field environment. Prevent interference from strong electromagnetic fields.
(5) Some equipment is required to stay away from certain solvents and gases. It is necessary to strictly follow the equipment maintenance instructions, and do not place related solvents near the equipment.
9. Increase lightning protection measures Every year, the equipment will be damaged or damaged by lightning. Be sure to take lightning protection measures. The interface line of the device has the function of an antenna. When these lines pass through outside the house, the possibility of being struck by lightning is greatly increased. The voltage during lightning strikes is very high, the current is very large, even if there is a separate ground wire, the danger of damage cannot be avoided, and there is also a threat to personal safety.
10. Equipment layout requirements For the convenience of operation, the related equipment is generally put together. At this time, it is necessary to pay attention to avoid the influence and electromagnetic interference between the equipment. For example, if we put the monitor next to the switch, the monitor will be interfered by the electromagnetic field generated by the switch, which will affect the display effect and the service life of the monitor.
Secondly, the interface lines should be laid out to prevent many lines from interweaving each other to interfere with each other. In addition, to protect the interface data lines, the SCSI data lines are relatively fragile and expensive. Being stepped on and kicked.
11. Altitude requirements Some devices have certain requirements for altitude, and manufacturers usually put them out separately, and they should follow their requirements as much as possible.
12. Fire prevention and anti-virus Attention should be paid to the fire protection of the equipment. Except for the corresponding fire-fighting facilities, do not stack flammable and explosive materials near the equipment. In addition, the device's control system software may also be attacked by viruses, and do anti-virus work.
13. Pay attention to human usage habits In order to provide a good working environment for the device, it is necessary to pay attention to some human usage habits:
(1) Do not stack things on the device, especially heavy objects.
(2) Do not put the liquid that is easy to pour near the device. (3) Operate the device in the correct order of power on and off. When the system itself has a shutdown function, use its system to shut down, and do not force the power off. When multiple devices are connected, the turning on and off of a certain device may produce voltage and current impact on the interface of another device. At this time, it is necessary to turn on and off in strict accordance with the order required by the manufacturer. For example, CTP devices usually turn on CTP first, and then turn on the computer. On the contrary, when turning off the computer, turn off the computer first, then turn off CTP.
(4) Reducing the accidental power failure The damage to the equipment caused by accidental power failure is very large. In addition to the electrical and electrical damage, the mechanical parts will also be greatly damaged. Just like the emergency brake of the car, the damage can be imagined know. Of course, there are some unexpected power outages that we cannot control, but we should try our best to minimize the sudden power outages caused by humans.
(5) Do not start the device frequently, and do not turn it on immediately after it is turned off.
Frequently opening and closing the equipment is easier to shorten the service life of the equipment than the equipment is turned on for a long time. Because the circuit generates a strong voltage and current impact at the moment of switching, it is easy to damage the electronic components, especially to prevent the phenomenon of starting immediately after shutdown, because the capacitor is discharged before the discharge is completed, it is easy to break the capacitor, resulting in damage to the entire circuit board .
(6) Don't plug and unplug equipment while power is on. Many people are flustered for laziness, or have developed bad operating habits. Devices that do not support plug and socket are also plugged and unplugged. This situation can easily damage the device.
(7) Prevent objects from falling into the device When the device is in operation, pay attention to preventing items such as ornaments, pens, jewelry, hairpins, etc. from falling into the device and damaging the device.
14. Reduce maintenance and repair misoperation (1) The maintenance of many equipment may be different from the normal operation, and it must be done in accordance with its operation and maintenance instructions, which cannot be taken for granted. For example, the moving parts of some equipment should never be lubricated, and some parts cannot be cleaned with alcohol, etc.
(2) Non-professionals should not carry out equipment maintenance. Non-professionals will only make mistakes, which may be counterproductive, damage good parts, and may also cause personal safety problems.
3. Summary The above are some basic requirements for establishing a good prepress equipment working environment. In addition, many prepress equipment may also have its unique environmental requirements, which must be strictly observed. Only in this way can equipment failures be reduced, service life extended, production quality improved, and maintenance costs reduced.
A good environment is very important for the maintenance and repair of equipment. The benefits it brings to the enterprise are huge and long-term, and it will soon be reflected in the economy. Many companies have done very well, and posted the environmental requirements of each device near the device to remind the operator. Establish a standardized and perfect system to control and improve the working environment of the equipment, implement it to people, and record the case, which provides a favorable guarantee for the normal operation of the equipment. These are worthy of our reference.
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