1. Introduction

Surface roughness is an important indicator for measuring the micro geometric shape error of the workpiece surface, which is crucial for industries such as mechanical processing and precision manufacturing. As a key equipment for detecting this indicator, the accuracy of the surface roughness measuring instrument directly affects the evaluation of product quality. However, in practical use, the measuring instrument may encounter various errors due to various factors. This article will elaborate on common error troubleshooting solutions.

2、 Errors caused by internal factors of the instrument and their investigation

1. Sensor malfunction: The sensor isSurface roughness measuring instrumentIf the core components are damaged or their performance deteriorates, it will result in measurement deviation. During inspection, observe whether there are any signs of damage on the appearance of the sensor; Conduct calibration tests using standard sample blocks, compare the differences between the measured values and the standard values, and determine whether the sensor needs to be replaced.

2. Abnormal drive box: The drive box is responsible for driving the sensor to move smoothly along the surface of the workpiece. When the drive box runs unstably, such as stuttering, jumping, etc., it will cause the measurement trajectory to deviate from the ideal state, resulting in errors. At this time, the transmission mechanism inside the drive box should be checked to see if the gears are worn or if the chains are loose, and relevant parts should be adjusted or replaced in a timely manner.

3. Aging of electronic components: Electronic components that have been used for a long time may experience parameter drift, which affects the accuracy of signal processing. Regularly inspect the internal circuit board of the instrument to check for issues such as virtual soldering and capacitor bulging. If necessary, seek professional repair or replacement of damaged components.

3、 Errors caused by external environment and solutions

1. Temperature changes: When the ambient temperature fluctuates greatly, it will cause thermal expansion and contraction between the measured workpiece and the measuring instrument, changing the relative position relationship between the two and the physical properties of the material, thereby introducing errors. Keep the laboratory temperature relatively stable, try to control it within a certain range (usually around 20 ℃), and allow the workpiece and instrument to fully adapt to the ambient temperature before measurement.

2. Humidity impact: In high humidity environments, water vapor in the air may condense into droplets on the surface of the workpiece, interfering with the measurement process; At the same time, it will accelerate the rusting and corrosion of metal components, reducing the accuracy of the instrument. Ensure a dry and ventilated working environment, equipped with dehumidification devices to maintain appropriate humidity levels.

3. Vibration interference: Strong vibrations from surrounding equipment can be transmitted to the measuring instrument, disrupting the normal measurement state. Stay away from large mechanical equipment, punching machines, and other sources of vibration, or take effective vibration isolation measures such as installing shock absorbers.

4、 Errors caused by improper operation and corrective measures

1. Unstable workpiece clamping: If the workpiece is displaced or tilted during the measurement process, it will inevitably lead to measurement data distortion. The correct approach is to select a suitable fixture based on the shape of the workpiece, firmly fix the workpiece, and ensure that it remains stable during measurement.

2. Measurement parameter setting error: Different types of workpieces need to be matched with corresponding measurement parameters, such as sampling length, evaluation length, etc. Operators must be familiar with various standard specifications, accurately input the correct parameter values, and avoid erroneous results caused by incorrect settings.

3. Incorrect probe contact method: Excessive contact pressure between the probe and the workpiece surface may scratch the workpiece surface, while insufficient contact pressure may not accurately reflect the contour information. Use appropriate force to gently adhere the probe to the surface of the workpiece, following the manufacturer's recommended usage method.

V. Summary

In summary, to effectively identify common errors in surface roughness measuring instruments, it is necessary to comprehensively consider multiple aspects such as the instrument's own state, external environmental conditions, and human operation. Through meticulous daily maintenance, strict environmental management, and standardized operating procedures, the occurrence of errors can be greatly reduced, the accuracy and reliability of measurement results can be improved, and strong quality assurance can be provided for industrial production.