Heidelberg HD102V four-color offset press troubleshooting example (below)
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Fault 17: The paper roller has a slight abnormal impact
Reason: The loosening of the fastening bolts of the toothed cam plate is loose or broken, which causes the cam to oscillate at the time of periodic opening, and the abnormal sound is emitted.
Repair: This fault is generally not easy to find. The key is to judge correctly. Once the fault is found, the repair is easy. Just tighten the three M6 bolts tightly.
Fault 18: periodic abnormal sound from the impression cylinder
Reason: Individual crepe paper is improperly adjusted and collides with the drum
Repair: Accurately determine the sound orientation, and carefully check whether there are scratches on the back of the paper and the roller. Individual adjustments can be made.
Fault 19: Ink roller does not move in place
Cause: The elastic cylindrical pin is cut.
Repair: replacement of new parts, due to space structure limitations, the problem is small, but difficult to find, difficult to disassemble, the piece can be processed according to the West German DINl481 standard, 86 years, the state has developed the standard GB879-86, there is no Less manufacturers start production, if you can't buy the goods for a while, you can make them with spring steel sheets.
Fault 20: The water roller does not turn
Cause:
1 The circuit or the water roller motor is broken, part number 93.178.1343;
2 The motor seat fastening bolt is loose, the motor is skewed;
3 The water roller needle bearing is damaged and jammed.
Repair:
1 check circuit and motor;
2 adjust the motor to tighten;
3 replace the bearing, it is recommended to choose the replacement parts, the price is at least 10-30 times cheaper
[A. Processed according to West German DIN618 standard;
B. Bearing substitutions with similar structural dimensions according to national standards, such as 942/20;
C. Replace with a nylon rod cover (sliding bearing)].
Fault 21: The transfer roller is inaccurately transferred, wrinkled paper, rotten paper, and the adjustment is not good for a long time.
Reason: The tooth roller (bearing) is damaged, part number 00.550.0096, this fault repair is easy. However, if you do not carefully observe the analysis, it is hard to find because the amount of swing is very small.
Repair: replace the new parts; or process according to the West German DIN5412 standard; or select the national standard bearing, used as a pin.
Fault 22: Feida paper is difficult to absorb paper
Cause:
1 The nozzle is worn out;
2 The air flow is not smooth or the air pump wears and the air volume is small.
Repair:
1 side draw processing nozzle;
2 check gas path and air pump, symptomatic treatment.
Fault 23: Feida lift adjustment pinion bad
Repair:
1 mapping processing;
2 bonding method repair.
Fault 24: Water, uneven ink, light weight or light weight
Reasons:
1 The water and the roller head of the ink roller are seriously worn, resulting in an increase in the gap and the roller is beating.
2 The bearing is short of oil, dirty or rotted, resulting in different weights.
Repair:
1 shaft head inlaid steel sleeve emergency, steel sleeve outer garden electric spark reinforcement treatment to increase hardness and wear resistance;
2 shaft head metal brush plating or spraying;
3 shaft head adhesion wear layer;
4 surveying and processing; 5Maintenance or replacement of bearings.
Fault 25: uniform water, uniform roller does not turn
Cause: The bearing is short of oil, dirty or rotted.
Repair: maintenance and repair or replacement of bearings
A. according to the West Germany DIN standard or similar national standard processing purchase;
B. with domestic 203 bearing outer garden grinding repair emergency.
Fault 26: The pressure of the ink roller is light, not adjusted, sometimes loose
Reasons:
1 The pressure worm and the worm are worn or damaged, and the
2 roller end bearings are dirty or damaged.
Repair:
1 Surveying and processing worm gears;
2 Maintenance and replacement of bearings as before.
Fault 27: The main air pump is very noisy, and the suction volume is small.
Reasons:
1 Dust blocks the air chamber;
2 The sliding piece, cylinder block, end cover, etc. are seriously worn, and the seal is not leaking.
Repair:
1 Wash and wash the parts; refueling,
2 change the sealing ring, slide the steel sheet;
3 end grinding a small amount, see flat;
4 repair the cylinder.
Fault 28: The main air pump is seriously worn, unusable, difficult to repair or lose economy
Repair:
1 Original pump mapping and external processing, hope to produce in professional air pump factory; 2 Use two Zhenjiang QB-80 air pumps in parallel, only need to slightly improve the pipe joint (the original pump air volume is 130 liters).
Fault 29: When running, the drive side hears a "beep" sound
Reason: The main drive multi-ribbed belt is slippery or too loose, and the long belt part number is 00.270.0051 short belt 00.270.0052.
Repair:
1 Open the hood. If the short belt is too slippery, loosen the fastening bolts of the bridge axle and tighten the belt. After tightening the belt, tighten the belt tightly.
2 If the belt is too loose, adjust the main Motor base.
Fault 30: The main drive multi-ribbed belt is broken, the same as the 29th case
Reasons:
1 Normal fatigue is broken;
2 Oil leakage erosion accelerates aging, and improper tightening accelerates fracture.
Repair:
1 change the new belt;
2 according to the West German DIN standard processing;
3 improve the original structure for the HTD belt drive, please refer to fault five;
4 improve the original structure for the V-belt drive, see fault 5.
Fault 31: The water tank cover is broken and leaking, part number 66.030.092F
Cause: The dampening solution was caused by long-term soaking.
Repair:
1 plastic glue bonding seal;
2 mapping processing, mold processing is best, the choice of bakelite or plastic turning can also be emergency.
Fault 32: The plastic coating of the ink roller is rotten, and the ink is uneven.
Reason: Most of the shovel blade was accidentally scratched and gradually expanded.
Repair:
1 If the rotten area is small, it can be partially replenished;
2 The rotten area is large, and the whole plating method or thermal spraying method can be used;
3 using the whole plastic tube hot-sleeve method, it is necessary to calculate the plastic tube The amount of thermal expansion, after grinding and polishing to the required size;
4 special brush plating method, simple equipment, novel technology, especially suitable for on-site maintenance without disassembling, more suitable for batch processing of printing machine factory, performance price is better, can be reduced The cost is about 20 times.
Fault 33: Decontamination, inking effect is degraded
Reasons:
1 The surface of the rubber roller is aging, the crack is lost;
2 local bump defects.
Repair:
1 Surface grinding with a lathe;
2 Inject the epoxy resin into the lower part of the depression and level it; if the small piece is smashed, it can be made by sticking.
Fault 34: Ink film is damaged, part number 91.008.042
Repair:
1 Replace the imported with the plug of Tianjin;
2 It can also be used for emergency treatment of the polyester sheet.
Fault 35: poor lubrication or low oil
Reason: Did not refuel according to the regulations, improper selection of oil number, too thick or too thin or impurities in the oil, blocking the local oil circuit.
Repair:
1 Strictly implement the lubrication management system, regularly refueling and oil change, and correctly select the oil number. If there is slight blockage, use the pump to help clear the plug.
2 If necessary, adjust the oil distribution control valve to determine the reasonable intermittent oil supply. Quantity, the machine uses proportional distribution control, the valve is at the corner of the electrical cabinet.
Fault 36: Front gauge but paper
Cause:
1 Mechanical failure;
2 Photocell hole is blocked by paper dust or photocell is burned, part number 68.110.1322A.
Repair:
1 mechanical adjustment of symptomatic repair;
2 remove dirt or replace new photocell.
Fault 37: pull gauge but paper
Reasons:
1 The mechanical parts are damaged or misaligned;
2 The pull control circuit board is broken, part number 91.165.151l.
Repair:
1 mechanical adjustment, repair damaged parts;
2 replace some components or replace the circuit board.
Fault 38: Speedometer failure
Reason:
1 The tachogenerator burned out, part number 00.780.1329;
2 mechanical failure.
Repair:
1 Repair the tachogenerator;
2 Mechanical repair should be sent to the metrology department, because the speedometer is a measuring instrument.
Fault 39: Local malfunction of remote control ink adjustment device
Causes:
1 Adjust mechanical block such as cam block jam;
2 Small servo motor is broken.
Repair:
1 mechanical symptom adjustment and repair;
2 replace the motor.
Fault 40: Auxiliary delivery shaft shaft break
Reason: Improper use.
Repair: Welding or mapping processing according to the degree of damage.
Fault 41: Sudden fire at the main motor
Reason: The main motor carbon brush holder is worn out, causing poor contact, generating electric sparks, and igniting the gasoline leaked when the machine is wiped.
Repair: Regularly check and maintain the motor, replace the carbon brush 00.780.0409, and avoid oil spills. The carbon brush can be replaced by the national standard.
Fault 42: Clutch pressure control link broken
Cause: Improper operation or fatigue break.
Repair: welding repair or mapping processing.
Fault 43: Severe wear or partial sprocket
Cause: Fatigue wear or tear, mostly caused by chain repair.
Repair:
1 local welding repair pliers repair, local heat treatment to remove stress;
2 mapping processing, at the same time replace the disrepair chain, adjust the center distance is appropriate.
Fault 44: Paper-receiving side paper shaft seat is broken
Cause: Caused by accidental force.
Repair:
1 welding repair pliers;
2 surveying and processing
Fault 45: Roller trauma
Cause: A bruise or accidental fall of the screw.
Repair:
1 brush plating, deep copper plating, nickel plating on the surface, and then flat polishing;
2 metal powder thermal spraying, post-polished polishing;
3 adhesive metal powder filling, grinding and polishing;
4 partial studs, The metal block is smoothed.