Six tips for self-maintenance of screen printing equipment

When the electrical system of a piece of equipment fails, don't rush to disassemble it. First, understand the cause, process, scope, and phenomenon of the electrical equipment's failure, familiarize yourself with the basic working principles of the equipment and electrical system, and analyze each specific circuit. Clear the interrelation between all levels in the principle and the ins and outs of the signal in the circuit, and carefully analyze. Should be good at seeing the essence through the phenomenon, and be good at grasping the main contradiction of things. Combining my actual experience, after careful consideration, determine a scientific and actual maintenance plan.

Among them, the quick and effective maintenance technique is the "six sequence":

(1) First mechanical, then circuit. Electrical equipment is based on electrical-mechanical principles, especially the advanced equipment of mechatronics. The mechanical and electrical functions are organically coordinated and are two aspects of a whole. Often mechanical components fail, which affects the electrical system, and the functions of many electrical components do not work. So don't be confused by the superficial phenomenon, but through the essence of the phenomenon, the failure of the electrical system is not all the problem of the electrical itself, it may be caused by the failure of the mechanical parts. Therefore, if the faults caused by the mechanical system are repaired first, and then the faults of the electrical part are eliminated, it will often get twice the result with half the effort.

(2) Simple first. After complicated. This technique has two meanings: First, when troubleshooting, you must first use the simplest and easy method that is best for the maintenance personnel, and then use the complex, precise, or unfamiliar method. Second, when troubleshooting, first eliminate intuitive, obvious, simple and common faults, and then eliminate difficult and unhandled faults. In short: easy first and difficult later.

(3) First external debugging. After internal processing. External refers to the various switches, buttons, sockets and indicators exposed outside the enclosure or seal of the electrical equipment; internal refers to the printed circuit board, components and various connecting wires inside the enclosure or seal of the electrical equipment. First external debugging, then internal processing, is to use the switches, buttons, knobs, sockets, etc. on the electrical equipment panel to debug and check without disassembling the electrical equipment to reduce the scope of the fault. First, eliminate the fault caused by the external components of the electrical equipment. Check and repair the internal faults of the equipment and try to avoid unnecessary disassembly.

(4) First static side test, then dynamic side measurement. "Static refers to the overhaul of electrical equipment after a failure occurs without powering on; dynamic,'refers to the overhaul of electrical equipment after the electrical equipment is powered on. Most electrical equipment cannot be powered on immediately when overhauled after a failure. If energized, it may artificially expand the fault range, damage more components, and cause undue losses. Therefore, measure the resistance of the faulty electrical equipment before energizing, and take necessary precautions. Power-on overhaul

(5) Public circuit first, then dedicated circuit. If the public circuit of any electrical equipment fails, its energy and information cannot be transmitted, and the functions and performances assigned to each specific circuit and dedicated circuit will not work. If the power supply of an electrical equipment fails, the entire system cannot operate normally. It is impossible to realize the energy and information delivered to various dedicated circuits. Therefore, only follow the public circuit first. Only after the order of the dedicated circuit can the fault of the electrical equipment be eliminated quickly and accurately

(6) Check and repair common problems first, and then tackle intractable diseases. Electrical equipment is often prone to the same type of failure, which is a common problem. Because "common problems are more common. There are many treatments and elimination methods, and the accumulated experience is richer. Therefore, they can be eliminated quickly, so that you can concentrate on and time to eliminate rare and difficult diseases. Odd and intricate diseases are simplified. Steps to reduce the scope of the circle, have a target, and improve the speed of maintenance.

Things are often ever-changing and diverse. The same kind of fault of electrical equipment may have different appearances, and the same kind of appearance may have different faults. The situation where multiple faults exist at the same time is more complicated. There are six maintenance techniques in sequence, which must be targeted, flexible, and the order is not static. After any faulty electrical equipment is overhauled, you can't assume that everything is going well. A dedicated electrician should record the failure phenomenon, cause, overhaul process, skills, experience, etc. in a special notebook. At the same time, learn and master the electromechanical theory knowledge of various new types of electrical equipment, be familiar with its working principle, and upgrade one's own experience, skills, and experience to theory. Under the guidance of theory, specific faults are analyzed in detail. In order to be accurate, fast, and avoid detours to improve the efficiency of troubleshooting. Only in this way can I train myself to be an expert in overhauling electrical equipment. This is also the skill of electrical equipment maintenance: "summing up experience and improving efficiency".