During the operation of electronic tensile testing machines, errors may occur due to improper personnel operation or equipment reasons. Faced with these errors, workers often do not know how to adjust them. Today, Jinan Zhongnuo conducted the following analysis based on the common indication errors of electronic tensile testing machines:
1、 The positive deviation of the indication exceeds the tolerance.
1. After confirming that the installation level of the equipment meets the requirements of the regulations, check whether the friction force of the working part is too high, and if so, adjust the clearance between the guide wheels;
2. If there is still a positive deviation after excluding friction, loosen the fastening screws of the shaft sleeve connecting the swing rod and the push plate, adjust the push plate inward, and tighten the fastening screws. Verify step by step with a small dial. Repeat several times until the inspection is qualified;
3. If the small dial is qualified, but the large and medium dial still exceeds the tolerance, the weight of B thallium and C thallium should be appropriately increased until they pass the inspection.
2、 The indication error shows a "positive front and negative back" or "negative front and positive back" pattern on the dial, and some points exceed the tolerance.
The angle of the contact surface between the push plate and the tooth rod head needs to be changed. The adjustment method is to loosen the two screws and place a copper sheet or other thin metal sheet on the upper or lower side between the steel sheet and the push plate to change the angle. After repeated verification and adjustment until it is qualified.
3、 The negative deviation of the indication exceeds the tolerance.
Check if the force measuring piston is installed correctly and if there is excessive friction. After these reasons are eliminated, adjust the small dial to be qualified. If it still exceeds the tolerance, reduce the weight of B thallium and C thallium appropriately until it is qualified.