Role of Linear Scale Calibration in Achieving Measurement Accuracy

Calibration consists of comparing a known measurement to a measurement using your equipment. Having something professionally calibrated accomplishes two things. First, it checks the accuracy of the instrument you use. Second, it determines the traceability of the measurement. Reliable machine tool suppliers offer a broad range of machining solutions and services, including linear scale calibration.

Applications of Linear Scale Calibration

This calibration is the preferred choice for certain types of equipment. Some examples of these include surveying instrumentation, comparators, and microscopes. Professionals use each piece of equipment for high accuracy length measurements.

Typically, CNC distributors often use linear scales made of glass. On the surface is precision engraving that includes equidistant parallel lines. These run perpendicular to the line scale axis. This high-tech solution is ideal for measuring and verifying distances between the graduating line scale.

Significant Advances

The linear scale calibration services that reputable machine tool suppliers provide their customers had come a long way from when Ernst Abbe first discovered the “principle of alignment” in 1890.

Just as it did then, this same calibration method determines the distance between a reference line and the target graduation. The systems used today are far more advanced, though. As a result, they’re more accurate and reliable.

A prime example is the automation of linear scale calibration. Based on the operator’s input, the sliding stage goes to a default position for the measurement of the target line. Once it becomes stationary, a laser interferometer gathers positional data. At that same time, a camera snaps images of the graduated scale.

To determine the current position, those images get analyzed. Then, there’s a comparison made of the position to the calculated position. That’s when the system makes up for any difference by signaling the sliding state to better align the position.

Finally, the interferometer captures a second reading of the position data. This process repeats itself several times. It only stops when the error falls within a specified pixel range. That’s when the system obtains the final line position. The linear scale services that top machine tool distributors use do all of this automatically.

Critical Measurement Solution

Considering the kind of equipment that linear scale calibration works with, this is an important part of operations for many industries. Even a slight deviation in the measurement could make a huge difference in the outcome. Using calibration services from one of the most trusted CNC distributors will put your mind at ease.

If you have equipment that you need to have calibrated or you want to check the readings of your calibration tools, our experts at Maintenance Diagnostic Systems, Inc. (MDS) can help. Contact us today.