Printing machine maintenance experience - smelling faults
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Here are a few examples of the sounds of common faults:
1. The paper feed nozzle emits a slippery “beep” sound: this is caused by the wear of the nozzle during long-term use, the wear surface is smooth, or the air path is not smooth, the inhalation is too small, or it may be It is because the paper is too thick, too slippery, or stuck, etc., and can be handled according to the situation. Generally there are the following methods:
(1) set rubber ring on the nozzle
(2) Scratch the suction surface of the nozzle with a saw blade or sandpaper to increase the friction
(3) cleaning Feida, ventilation road
(4) remove the fouling in the air pump
(5) Relevant processing of the paper.
2. There are “squeaky” sounds in both mouths of the paper nozzle: it may be caused by the following reasons:
(1) is improper adjustment, the suction hole is not correct
(2) is the piston fixed screw automatically moves outward, causing the angle of the two nozzles to change, not parallel with the paper.
(3) is blocked by the gas path, or the air volume of the wind pump is too small. This is sometimes the case when the blower does not blow the paper or the presser foot presses too much, and the brush stops the paper. Can be handled according to the situation.
3. The drum part emits a "jingle" sound when printing: this sound may be caused by loosening of the plate screw of the plate plate. This is often the case when the two pull screws in the middle of the clip are loose. Shut down and tighten the screws.
4. The upper part of the machine emits a “beep” sound. The faster the speed, the louder the sound: this is because the ink is too sticky, sticky paper powder, too much paper, and accumulated in the ink roller. Clean the ink roller and wipe the paper wool on the heavy roller with a cloth.
5. The separation nozzle emits a "sudden" sound that is sucked out: this situation is purely a suction hole. A small screwdriver can be used to extend into the suction hole, and the suction hole is positively aligned to make it conform to the nozzle link.
6. The motor makes a “shock” sound: once this sound appears, the motor shaft and cymbal are seriously worn. Stop immediately and look for electricians and maintenance personnel.
7. There is a “click” sound in the shield: this is the resonance phenomenon generated when the machine is running, which causes the large tension spring of the pendulum to swing sharply. The striking shield can be adjusted appropriately. The sound disappears.
8. There is a serious squeaking sound of the squeaking part: If the sound appears continuously after turning on the machine, you can stop it and try it again, or the sound will appear and the paper will not pick up the paper, causing the paper to enter the drum inertia. This is a problem with the dental shaft. Stop the hand and move the shaft of the tooth with a hand, and feel the shaking, indicating that the shaft of the pendulum is worn seriously and there is a gap between the sleeve and the sleeve. Replace and repair it.
9. The electromagnetic iron has a continuous “beep” sound, but the paper pile does not rise: there are many reasons for this. For example, there is something wrong with the electrical appliance, the connection of the electromagnetic iron wick is broken, or the mechanical part is turned up. Causes this malfunction and responds to the problem.
10. The flying part suddenly has a harsh "click" sound: the sound is most easily discernible, that is, the mouthpiece is disconnected from the blowpipe, and the operator only needs to quickly insert the mouthpiece into the blowpipe.
11. The Feida electromagnet does not suck, the sound is not: the paper is piled up, try to open the Feida, if the above situation occurs again, the trip switch on the presser foot is broken, and it can be replaced. If it is in poor contact, it will be treated separately.
12. When the operation is turned on, the motor will scream and the machine will not turn: the brake is working, the machine can be reversed, and then run again, it will be normal.
13. The wind pump suddenly makes a harsh "beep" sound: generally the hair is too small, and it is not coordinated with the inhalation, and the wind pump knob can be quickly adjusted to restore the normal state.
14. When the side gauges rise and fall, the sound of “cracking” is issued: there are two reasons. One is that the pressure regulating spring of the side gauge is too tight; the other is that the paper roller is falling at the lowest point of the cam and the cam. Touch, the rhythm becomes longer, so it produces a squeaking sound. Adjust according to the situation.
15. After the paper is stopped, the paper feeding parts such as Feida and the belt pulley are all required to move, and the sound of “cracking” is randomly issued: this is that the clutch of the flying part is not completely separated, that is, the top spring is too tight. Loosen the top spring fixing screw and loosen the top spring a little.
16. The undulating roller is too large to make a "plop" sound: this is the adjustment of the water roller frame on both sides is too low. Tighten the top screws on both sides and re-adjust the water roller pressure.