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Common fault one: The passive needle does not stop well at any position and does not coincide with the main needle. The method of removal is to remove the dial glass, adjust the passive needle compression spring screw, and adjust the pointer to coincide with the main needle.
Common fault 2: The dial pointer has poor sensitivity, and there is a stop phenomenon after unloading, or the zero position often changes. There are many reasons for this.
1. The pendulum has obstructions during the lifting process, or the pendulum shaft is too dirty or rusted, causing the pointer to change back to zero.
2. The force of the piston in the cylinder is increased or stuck in the cylinder, and the chrome oxide paste is applied to the grinding until normal.
3. The belt on the force measuring piston is loose or too loose (so that the piston cannot run at a constant speed).
4. The buffer return oil is not good and should be adjusted or cleaned.
5. There is contact between the racker and the rack and should be loosened.
6. The pointer rotates the shaft dirty and should be cleaned.
7. The pulley on the rack and its track are too dusty and rusted. At this point you need to remove the cleaning, plus a little watch oil.
The electro-hydraulic universal testing machine is a basic instrument that is often used, so its loss and failure should be commonplace. It is necessary to master the common faults of the universal machine and its repair methods so as to improve the efficiency of production and ensure that it is not because of omnipotence. The machine malfunctions and delays production.
The electro-hydraulic universal testing machine mainly includes a hydraulic universal testing machine and an electronic universal testing machine. The universal testing machine includes one or more vertically supported columns, a fixed horizontal base is mounted on the column, and a movable horizontal crosshead is arranged on the top. (cross beam). In today's universal testing machine, there is usually a ball screw on the column to fix the movable crosshead. The size of the universal testing machine is characterized by the maximum load level of the frame and the dynamometer measuring the load/tension. The dynamometer is attached to a movable crosshead that is driven by an electric motor or hydraulic device.
Common faults and elimination of electro-hydraulic universal testing machine