The company has newly introduced a Heidelberg four-color offset printing machine. Recently, when printing higher-grade samples and albums, some tiny ink bars often appear on the printed products, which are difficult to eliminate. Although it is not serious, it appears in this more advanced Is not normal on the machine.
After careful observation and analysis, it is found that these ink bars are less than 1cm apart and are very regular, which should be rack bars. And such a small rack can only be caused by the water bucket motor driven by the water transmission roller. So, after wiping off the rubber roller, re-ink the pressure bar to adjust the relevant pressure. When the water transfer roller was manually pressed on the water string test pressure, it was found that the pressure between the two was a little bit larger, and they were all chrome-plated hard iron rollers. Excessive pressure will cause the water transfer roller to stand on the string It is the same on the water roller, which leads to the mismatch between the shaft head of the water transfer roller and the transmission gear of the water bucket motor, the gap is large, and there will be some vibration during operation. This kind of vibration is directly reflected on the printed product through the transmission of the water roller and the water roller, which affects the quality of the product. After finding the crux of the problem, readjust the pressure of the water transfer roller and the water transfer roller, and this rack will disappear.
This shows that the adjustment of the machine must be accurate and standardized, otherwise it will cause many strange and strange failures, and even damage the machine.
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