Heidelberg GTO series offset press failure and elimination (two)
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Fault five: the paper tongue is judged to be damaged
The reason:
Fatigue fracture
Troubleshooting method:
1. Welding repair;
2. Surveying and processing.
Fault six: the machine can not be clutched
The reason:
1. Control circuit failure;
2. The clutch pressure traction magnet fails.
Troubleshooting method:
1. Check the circuit;
2. If the electromagnet burns out, it needs to be wound around the coil; if it is not working properly because the magnet pull block is blocked, it is only necessary to eliminate the block gear;
3. If the above method does not work, you can replace the domestically produced MQ series of similar traction electromagnets. The traction force is 3Kg or less and the working stroke is 25mm or less. Be a small attachment.
Fault seven. The machine can't feed paper, the empty car is running normally, but it stops when it feeds.
The reason:
1. There is something wrong with the paper feeding circuit or the paper feed transmission mechanism;
2. The position switch of the limit switch (paper feed) is out of adjustment;
3. The adhesive layer on the front end of the paper feeding jaw is seriously worn;
4. The clamping force of the jaw is not enough;
5. The torsion spring of the dentition row is invalid;
Troubleshooting method:
1. Check the paper feeding circuit and transmission mechanism;
2. Adjust the limit switch contact to the normal position;
3. Replace the tooth piece or the mapping process, the rubber or polyurethane glue can be bonded on the tooth piece. Emergency method: remove the residual glue layer on the tooth piece, apply the acetone solution to the oil treatment with a brush, and then use the 502 glue to stick the cut piece of 0.5mm thick silicone cloth (or thick blanket, leather, canvas). For a while, please try it;
4. Remove the tooth piece, bend it a little to the inside, increase the elastic force, and then tighten the fixing screw firmly;
5. Replace the paper feeding torsion spring, surveying and mapping processing. The structural dimensions are steel wire φ1.2mm, spring outer diameter φ16mm, working length 25mm, number of turns 17, working twist angle φ140.
Analysis:
The downtime caused by cause 3 is very obvious, but it is not easy to judge quickly and accurately if it is encountered for the first time. Sometimes it is a waste of time and no progress. Because the paper feeding device is special, the domestic equipment does not have this structure, and the foreign models are rarely used, so it is often ignored and ignored. Moreover, there is a limit to judge the wear failure of the tooth. Please do a small test. Immediately, we can conclude that 2 pieces of 5X5mm medical tape are cut, the center is cut into small round holes, and it is glued to two smashed pieces. When the paper is normal, the problem is that the gingival piece wears out. If it sticks 2~3 layers of tape, It is normal to start feeding the paper, indicating that the clamping force of the tooth is not enough.
Fault eight. The ink-jet roller is peeled off and the ink is uneven.
Cause: The squeegee blade is scratched and expanded.
Repair method is the same as HDl02V machine.