Spool Roll

Heidelberg offset press right preclude common faults and maintenance – Heidelberg, offset press, troubleshooting – Printing Industry

A judge accurate, method is simple

Maintenance required a short time, so must be accurate discrimination of the fault location, maintenance method of taking the most simple maintenance, in the shortest possible time to solve the problem. Replacement parts should be selected and good quality fittings, installation of precision in place to avoid future trouble. Following are some examples of routine maintenance.

Fault 1: Pacers always drive under the face faster paper

Factory approach: maintenance of feeder valves?? Valve Lapping valve shell holes, plating valve spool, then replace the roller.

Mistake for: more severe valve leakage after the repair, the replacement of paper round pick quality as before.

Right way: The next paper skew is mainly due to the host machine installed feeder and not parallel with the main feeder calibration parallelism.

Fault 2: the time of printing, a “stripping” failure

Operator approach: adjust embossing roller teeth on the adjustment screw, try to increase the strength of teeth Diao paper.

Wrong with the: Heidelberg Printer paper strength of teeth by the spring force Diao and dental precision decision, the above methods can not adjust the teeth Diao paper strength, while only changing the time of the transfer roller tooth row, resulting in overprinting fault.

Right way: check radiographs and dental pad wear, replace them when necessary; check the existence of dental rafts “dead tooth” and solve the “dead tooth” problem; check the transfer relationship between the teeth arrangements, if necessary regulation.

Fault 3: “Rejection Point” failure

Operator approach: regulation Biography roller teeth pedestal below the screw, adjust ink viscosity, adjusting the printing pressure.

Error between: regulation Biography roller teeth pedestal below the screw, changed the small dental pad transfer roller to adjust the level of the benchmark, so that the correction is even more cumbersome; ink viscosity and printing pressure to be determined in accordance with the needs of print, can not deliberately change the overlay issue. These methods can not solve the Indian goods “dumped angle” problem.

Necessary Description: used for many years without maintenance and equipment, common “rejection angle” fault. Many factors caused this failure, and only when the equipment maintenance can be done more thoroughly resolved.

II Good record Of the equipment failure situation, solutions, exchange of parts and repair do well after the effects of such records for inspection at any time and for future maintenance and overhaul work on a regular basis to provide reference.

Third, to avoid the quick success of the practice

Peak in production tasks, the factory is to open up the machine as soon as possible, while taking improper maintenance practices, to the future maintenance of equipment trouble or cause accidents. Practice shows that this may cause greater damage, the following are some examples in this regard.

Fault 1: string roller gear damage

Operator heard the voice of unusual machines, parking, and open the drive surface side protective cover, found a series of roller gear is damaged. As the printing business busy maintenance staff continues to turn a simple treatment. Equipment operation for some time, found some ink and wetting for a total of eight gears some serious damage.

Turned out, the first gear damage due to: string roller gear behind the bearings by the unusual role of external damage, which the ball drops, causing gear damage.
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