The accuracy of the measurements is crucial in various industries, including automotive, aerospace, and medical device manufacturing. However, errors in CMM measurements can occur, leading to incorrect measurements and negatively affecting product quality. CMM calibration is the process of adjusting the machine to ensure that its measurements are accurate and consistent. Calibration is necessary to maintain the precision and accuracy of the CMM over time, as wear and tear and environmental factors can affect its performance. During calibration, technicians compare the machine’s measurements to known reference standards, adjusting as necessary. In this blog post, we will talk about the major causes of errors in coordinate measuring machines, with a focus on CMM calibration.
Causes of Errors in Coordinate Measuring Machine
There are several factors that can contribute to errors in CMM measurements, including:
1. Environmental Factors
Changes in temperature, humidity, and air pressure can affect the performance of the CMM. Temperature changes can cause the machine’s components to expand or contract, leading to inaccuracies. High humidity can cause corrosion and damage to the machine’s electronics, while low humidity can create static electricity that interferes with measurements.
2. Wear and Tear
As a CMM is used over time, its components can wear out or become damaged. For example, the bearings that allow the machine to move smoothly may wear down, leading to imprecise movements. The probe used to take measurements can also become damaged or worn out, leading to inaccurate readings.
3. Software Errors
CMM software is used to control the machine and process measurement data. However, errors in the software can lead to incorrect measurements. For example, if the software is not properly calibrated, it may not accurately process measurement data.
4. Operator Error
Even the most accurate CMM can produce inaccurate measurements if it is not used correctly. Operator error can occur if the operator is not properly trained or if they do not follow proper operating procedures. For example, if the probe is not properly aligned with the part being measured, the resulting measurements will be inaccurate.
CMM Calibration to Prevent Errors
To prevent errors in CMM measurements, calibration is essential. Calibration should be performed regularly to ensure that the machine is operating within its specified accuracy range. Calibration should be performed by trained technicians who are familiar with the machine’s operation and the calibration process.
During calibration, the machine’s accuracy is checked against known reference standards. Adjustments are made as necessary to ensure that the machine is operating within its specified accuracy range. The calibration process should be documented, and records should be kept tracking the machine’s performance over time.
If you are looking for a reliable CMM calibration service, we recommend KES Machine. KES Machine is a leading provider of CMM calibration services, with a team of experienced technicians who are trained to calibrate a wide range of CMMs. KES Machine uses state-of-the-art calibration equipment and techniques to ensure that your CMM is operating within its specified accuracy range. Contact KES Machine today to learn more about their CMM calibration services.
