Precise measurements play a key role in CNC machining processes such as milling, turning and drilling. The main goal is to ensure that the dimensions of the workpieces conform to technical requirements and maintain high production quality. Dimensional accuracy directly affects the functionality and durability of final products, so it is essential to constantly control machining parameters, especially in serial production, where repeatability is a priority.
Measurements also make it possible to quickly detect and correct deviations, which minimizes material losses. In advanced manufacturing processes such as those used at SIM Gdynia, measurements are an integral part of quality assurance.
Traditional measurement methods
Traditional measuring tools, such as calipers and micrometers, have been the cornerstone of dimensional control in CNC machining for decades. Calipers can measure lengths, diameters and depths to an accuracy of about 0.02 mm, making them versatile tools. Micrometers, on the other hand, offer an accuracy of up to 0.001 mm, making them suitable for measuring workpieces that require greater precision, such as shafts and bushings.
Despite their versatility, traditional tools have limitations. Measuring complex shapes or workpieces with complex geometries can be time-consuming and subject to greater risk of error. In such cases, it becomes necessary to use more advanced technologies that automate the measurement process and achieve greater accuracy.
Modern solutions – coordinate measuring machines
Coordinate measuring machines (CMMs) represent a state-of-the-art approach to dimensional control in CNC machining. They enable precise measurement of workpieces in three axes (X, Y, Z) using contact or non-contact probes. Measuring machines such as Mitutoyo’s offer the ability to measure complex geometries with accuracy down to microns.
The machine works on the principle of collecting points from the surface of the workpiece, moving along pre-programmed trajectories. The measurement program for each workpiece is created once, which guarantees repeatability and standardization of the process for subsequent measurements. At SIM Gdynia, we use such solutions to obtain detailed dimensional analysis of parts with complex shapes, which allows us to maintain high quality standards.
The design of the measuring machine makes it possible to measure parts with large dimensions, such as machine parts or components used in aviation. By automating the measurement process, the impact of human error can be minimized and the speed of dimensional analysis can be increased.
3D scanners and laser sensors in CNC measurement
Today, industry is increasingly using non-contact technologies such as 3D scanners and laser sensors. Scanners allow comprehensive mapping of the geometry of a workpiece, which is particularly useful for parts with irregular shapes. The technology enables the creation of 3D models that can be used for comparison with CAD data and for further analysis.
Optical and laser sensors offer precision and speed, making them ideal for real-time measurements, especially in mass production. Their use minimizes the risk of damage to the workpiece, which is important for delicate or deformation-prone materials.
How to choose the right measuring methods?
Choosing the right measuring tool depends on several factors, such as dimensional tolerances, workpiece geometry and surface quality requirements. For simple workpieces with less stringent tolerances, traditional tools such as calipers or micrometers may be sufficient. However, for more complex workpieces that require analysis in multiple planes, coordinate measuring machines or 3D scanners are the best solution.
At SIM Gdynia, we take a diverse approach to measurement, adapting methods to the specifics of the project. As a result, we are able to ensure precision in both unit and batch production.
Summary
Measurement in CNC machining is the foundation of precise and efficient production. From traditional tools such as calipers and micrometers to advanced CMMs and 3D scanners, each technology has its place depending on the specifics of the project. At SIM Gdynia, we are constantly developing our measurement capabilities, using the latest technologies to deliver products that meet the most stringent technical standards. This allows us to offer our customers reliability, repeatability and the highest quality at every stage of order fulfillment.
