Analysis of the compression phenomenon of ECRM-1030 laser imagesetter

Analysis of the compression phenomenon of ECRM-1030 laser imagesetter

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At present, many users are using the ECRM-1030 imagesetter, most of which have a usage time of 4-5 years. The prominent problem that is common nowadays is that there is a long and uneven compression phenomenon in the direction of the film, which often causes the discharge core to be smaller than the normal core, and the film cannot be used. Causes a lot of waste for many users.

Based on our experience in long-term maintenance of such faults, the emergence of such phenomena mainly comes from the following aspects.

First, the impact of the electrical components of the photo machine

Due to the long time of use of such imagesetters, some of the components of the electrical appliances have a aging property. The thermal stability of the existing components is reduced, so that the film is still normal when it is turned on, but the film is compressed for a long time. Some are still normal, such faults are more complicated to solve, so it is generally necessary to have certain electrical professionals to test the components one by one, and some even need to warm and test their performance parameters. Find the component in question and replace it. These components are primarily on the sheet motor control board. Among them, the performance of the adjustable resistor R1 on the motor control chip has a great influence on the film. At the same time, if the film core is out of the way, the core can be adjusted to adjust the size of the core. However, please note that when you adjust this resistor R1, you can't change it too much. Generally, the step should not be adjusted more than 1/4 full rotation at a time, and each time you make a change, observe the change of the film, so that the resistance value can be increased (or reduced) at any time until the correct core size is adjusted. .

Second, the impact of the mechanical transmission of the arrangement machine

Due to the many component failures in the mechanical transmission of the imagesetter, we will analyze the main components.

A. Go to the glue stick.

Because the machine is used for a long time, and some users lack certain maintenance knowledge, more users use the cleaning, so the long-term fatigue of the rubber stick is hard, there is no elasticity, the surface is not smooth, deformation, the right to use glue stick and photo arrangement The friction coefficient between the plates is reduced, the plates are slippery, and it is difficult to remove the sheets. If you use a whole roll that has just been installed, it is more difficult to make the film smoother because the whole roll is heavier. Therefore, according to the machine glue sticks should be cleaned frequently, do not use the acidity of the clean cleaning, not to use the industrial sprinkling to scrub, this will accelerate the aging of the stick, if the stick is not elastic, the surface is very smooth, it has to Replace it as well.

B, gearbox

On the one hand, due to the long use of the photo-aligning machine, the lubricating oil lacking maintenance of many mechanical gearboxes has been formed into a block shape, which is easy to bring to the gears and affect the running of the pieces. On the other hand, due to the increased clearance of the gear sets, the direct influence To take the film, usually looking for the gear box, the gear box should be cleaned and refueled according to the frequency of use of the machine for half a year or one year.

C, the film motor

The motor is a key component that directly affects the quality of the film. The replacement price is quite expensive. For long-term use, the motor lacks lubrication and wears. The brush wears and the motor does not conduct well. The motor cable is not moving, or After taking the film, pressing the film or the slice button will not cause a rapid phenomenon. Therefore, if it is judged that there is a problem with the motor, the contact with the maintenance unit should be contacted as soon as possible to prevent the motor from being worn out, so as to reduce the direct and indirect loss of the motor damage.

In addition to the above three main components, the transmission between the gearbox and the glue stick of the ECRM-1030 is driven by the belt, so the contact surface between the belt and the runner becomes very smooth after long-term use, so the film is taken. Sometimes it slips and can't be driven very well (the ECRM-1030 of the electric machine generally does not have this phenomenon), especially when it comes out of the flat net, there are phenomena such as re-election, pull-drawing, etc., if conditions permit. Replace a belt. If the conditions are not allowed, use a rosin on the inside of the belt to increase the friction.

In short, the photo-setting machine is a relatively expensive and high-precision device for the front end of the printing and publishing front. Therefore, it should not be used only and lacks maintenance, so that it can work for a long time. Once it is "sickly ill", it can really make up for it. The last reminder is the light film motor. The position of the gearbox directly affects the filming of the photo gallery, and some may even damage the motor or gearbox.

(2) Reasonable use and daily care of laser imagesetter

It has been found from the repair work of the photo-finishing machine in the past year that the phenomenon that the photo-aligning machine cannot be used due to the damage of the laser motor is still widespread. According to the understanding of the operators, they do not know how to use it properly. benefit. And the cost of replacing a motor is quite expensive, so we re-emphasize the importance of "reasonable use." 

First, the photo machine laser motor

In view of the laser imagesetters currently used by most users, the laser motors are mainly vibrating and rotating. For example, ECRM-1030, 1045, 1545 and other models use vibrating motors; ECRM-VRL30, VR30, VRL45, etc. It is a rotary motor. For rotary laser motors, they can be divided into ball type and air floating type: air suspension type rotary motor is used in series such as ECRM-make46. 

1. From the structure of the vibration motor, it is mainly composed of coils, bearings and reeds. The sinusoidal AC voltage is added to the motor coil to make the swing axis extend back and forth, and the reeds play back and fix. . Due to the high frequency swing of the motor, it is easy to cause the reed to fatigue or even break, making the motor inoperable. 

2. Bearing type rotary motor. There is one bearing on the upper and lower sides of the motor shaft (this can increase the stability). Due to the long-term high-speed rotation of the motor and the lack of maintenance and maintenance, the bearing will be damaged or damaged, which will affect the stability of the motor, and even the motor is locked. 

Second, the meaning of reasonable use

The reasonable use we are talking about mainly refers to the use of the operator in the arrangement process. Everyone knows that in the process of issuing, you should consider 1. Each file is not continuous. It takes time for the computer to process the page file. In particular, some files contain a large number of pictures and many irregular patterns (circles, polygons), etc., and the computer processing time is longer; 2. Due to the speed of the issuing host, the processing time is short. Not the same; 3. After the completion of a file, the next file is sent at any time; 4. The filming time, the change time and whether there are multiple boxes and other factors. In the occupation time of these many factors, we have been working in the machine motor. We understand and reasonably master these situations, so that the motor of the imagesetter can be stopped as much as possible during these useless hours, which can reduce the wear of the motor and greatly extend its service life. 

Third, the reasonable use of 

1. For vibrating motor imagesetters such as ECRM-1030, 1045, 1545, etc., since the motor has been in high-speed vibration since the start of a file until you press the stop button, we will consider your own consideration. In the case of a row, if the file map is too much, too large, the host is slow, or the time for waiting for the next file is long, first press the stop button of the photo machine to stop the motor of the photo machine, and the photo machine is in the online waiting state. Once the host gives the signal, the photo machine automatically responds to the photo, although this adds some work procedures, but the working life of the machine is very beneficial.

2. For rotary motor imagesetters, such as ECRM-VR30, VR45, make46, etc., the interior of the imagesetter itself is designed to control the idle time of the motor. We can set this time to the most reasonable state according to our actual situation, and can also greatly reduce the idling of the camera motor, which plays a protective role. The specific operation is:

1Press the menu button (menu) on the control panel;

2 Press select until the panel displays menu potions system setup;

3Press the forward button (next) until the panel displays spinner timeout value in minutes;

4Press the forward key (next) or the backward travel key (prev) to adjust to the desired digit value. Use the Select key (Select) to adjust the size of the selected digit.

5 If the setting is completed, press the (stop button) twice to save the settings.  

In the long-term maintenance process of the machine, we found that as long as the operator of the arrangement machine pays attention to it, it can play a certain maintenance role on the equipment, prolong the service life and reduce the maintenance cost. There are many other issues and protection experiences; we will give you a step-by-step introduction in the future. Also welcome users who have problems with the imagesetter to contact us directly, we will try our best to answer your questions, troubleshoot for you, and make your work smoother.

Quick question

1. How to solve the compression phenomenon of FUJI F6000 laser phototyper?

You should first check if there is a problem with the software RIP settings. Also install the RIP computer (including the hard disk, memory, interface, SCSI card and SCSI cable). Exclude the above hardware and software problems and then check the imagesetter.

2, SCREEN5055 laser phototyper film is not stable how to do?

1) Try to control the indoor temperature as much as possible, keep the temperature around 22° and the humidity about 60%.

2) Try to use the same brand of film, don't change the film of different brands frequently in the short term.

3) Check if there is any obvious wear on the cassette.

3, SCREEN3050 laser phototypesetting machine daily maintenance points?

1) Ensure indoor environment (small dust, room temperature is about 22°, humidity is about 60%).

2) Install the exhaust fan of the machine and keep the room clean when changing the potion.

3) Regularly clean the 3050 imagesetter power supply fan filter.

4, SCREEN5120 laser phototype machine often issued faults?

1) Clean the outer drum regularly.

2) Try to use LED film.

Adjustment of laser intensity of ECRM1545 imagesetter

The ECRM series winch type laser imagesetter is easy to operate and stable in performance, and has many users in China. However, some users have found that the density of the film output from the imagesetter becomes smaller and smaller after using for a period of time. Even if the laser intensity on the imagesetter is adjusted to the maximum, the film density cannot be achieved. Most of this situation is caused by dust contamination of individual components on the laser beam path of the imagesetter, resulting in divergence of the laser spot, a decrease in the intensity of the laser signal, and a decrease in the density of the image on the photographic film. It is also possible that the parameters of the individual components in the control system of the imagesetter have changed, resulting in a decrease in the quality of the laser carrier signal, which may also result in insufficient film exposure and a large bottom ash. The ECRM1545 imagesetter is taken as an example to discuss the solution to these two situations in detail.

First, remove the screws in the upper right corner of the rear end of the imagesetter, remove the right side panel and the upper cover, and you can see all the control boards and low voltage power modules in the imagesetter. Then, unscrew the eight inner hexagonal screws on the black hood of the imagesetter to remove the hood, and then you can see all the optical path devices including the laser tube, condenser, galvanometer and acousto-optic modulator. Assembly. Clean dust on the mirrors, condensers, polarizers, and all mirrors and beamsplitters in the beam path. Among them, the galvanometer is the most important. It is located at the left end of the concentrating mirror (viewed from the direction of the operation panel). Its function is to project the original laser beam emitted by the laser tube onto the grating through its own high-speed oscillating motion, providing the control circuit for the illuminating machine. Synchronization signal, at the same time, the laser beam modulated by the acousto-optic modulator is scanned onto the photographic film to form a graphic image. Take extra care when wiping the galvanometer, preferably with a camera lens paper or tweezers. If you do not have the above items, you can also immerse the cotton wool ball in 95% alcohol, then take it out, squeeze it out and clean the galvanometer. After wiping the galvanometer, carefully observe whether there is cotton fiber left on the galvanometer. If so, carefully remove it. The next step is to clean the condenser and other optical lenses on the optical path. The cleaning method is the same as the method of cleaning the galvanometer. Be sure to wipe it carefully because the various mirrors in the optical path are very sensitive to the position. If the force is too large during the wiping process, The position of the mirror moves, the laser path changes, and the position of the last scan of the laser beam also deviates. In severe cases, the camera will not work properly. After wiping all the lenses, it is also necessary to carefully check the presence or absence of fibrous residue on these lenses. Also, note that the polarizer cannot be wiped with an alcohol cotton ball, otherwise it will cause permanent damage to the polarizer. The next task is to test against the row machine, that is, use the self-checking function of the photo machine to output a film to check whether its density meets the normal use requirements. When performing the self-test on the imagesetter, be sure to attach the hood.

For an imagesetter using a He-Ne laser, the composition of the laser beam path is similar, and the components in the optical path can also be cleaned by the above method.

If the light intensity of the optical path after the cleaning process is still unable to reach the film density requirement, the position of the laser tube must be properly adjusted, and the purpose of improving the laser intensity and improving the quality of the laser spot can be achieved.

First, remove the hood on the imagesetter and turn on the power of the imagesetter so that the imagesetter is in standby. The shutter in front of the laser tube is pulled open and held up with a small screwdriver so that it is in the normally open position, and the working direction of the entire laser beam path can be observed. Use an oscilloscope to measure the amplitude and angle of the raster signal at the raster input of the main control board (No.: 9693) measuring point "TP15". Under normal circumstances, the signal amplitude should be greater than 2V, the angle is Xms / Yms = 4 / 1, as shown in Figure 1.

If the amplitude of the grating signal at "TP15" does not meet the above requirements, you can loosen the four locking screws of the fixed laser tube, gently rotate the angle of the laser tube, or move the front and rear positions of the laser tube slightly to observe the oscilloscope. The amplitude of the signal is such that it reaches between 2 and 3V. However, the larger the signal amplitude, the better. Although this can obtain a better synchronization signal, the quality of the spot is crucial for a secondary laser carrying a graphic signal. Only high-quality secondary lasers can get clear images on film. After adjusting the grating voltage amplitude of the laser tube to the required level, turn off the power of the imagesetter and tighten the screws that fix the laser tube. Then turn on the power of the laser tube, review the waveform and related parameters at “TP15” to ensure accuracy, and then cover the hood for self-test.

Since the laser debugging process of the entire imagesetter is carried out under live conditions, especially the high-voltage input inside the laser tube, special attention should be paid to safety throughout the debugging process. Because all the boards and low-voltage power modules of the imagesetter are exposed to the outside, do not drop metal objects or water on the circuit board during the cleaning of the laser light path and debugging laser to avoid short-circuit accidents. .

Attachment: Self-test method of ECRM1545 imagesetter

First, use the laser intensity adjustment knob on the photo-alignment machine to place the laser intensity in an appropriate position, such as placing the laser intensity indicator strip on the operation panel between 10 and 15 divisions. Then, place the "Shelf Test" switch in the "Test" position. Start the imagesetter to the normal working state. When the counter goes 5 points, press the “Stop” button and then press the “Crop” button to perform normal flushing of the self-test film. The result is as follows: If the film density If it is too large, it can be adjusted by the laser intensity adjustment knob on the photo-alignment machine to achieve the density requirement for normal use. It is no longer necessary to adjust the position of the laser tube.