CMMs can be broadly categorized based on their shape or construction, measurement methods, and operating methods. When selecting a CMM for your business, it is crucial to choose a type that aligns with your specific needs and applications. Below is a summary and explanation of each category.
Coordinate measuring machines (CMMs) are broadly categorized into two types based on their measurement methods. Let's look at the characteristics of each type:
The contact type (touch probe) CMM measures by making direct contact with the object. Common examples include gantry-type and articulated arm-type CMMs, which are primarily used for measuring coordinates and dimensions.
The non-contact type refers to measuring machines that do not touch the object directly but use scanned data to perform measurements. Examples include laser scanning and CCD-based CMMs, which measure various dimensions using data obtained from 3D scanners.
Coordinate measuring machines (CMMs) can also be classified based on their operating methods:
Manual CMMs are manually operated by the tool head using a controller or other device.
CNC type CMM operates the tool head under computer control. In this method, a path is created by software, the path data is sent to the CMM, and the tool head moves along the defined path.
CMMs can be classified into several shapes or types of construction: "Bridge-type", "Arm-type", "Gantry-type", "Cantilever-type", and "Handheld-type".
This section introduces the advantages and disadvantages of each type of CMM construction, as well as their specific applications. Understanding the selection criteria based on construction can guide you in making the right choice when implementing a CMM for your business.
Learn more about CMM Shapes / Types of Construction
CMMs perform three-dimensional coordinate and dimensional measurements by contacting an object with a spherical probe, known as a stylus. This section explains in detail the mechanism of CMM measurement methods, along with their advantages, disadvantages, and applications.
Learn more about Measurement Methods of CMM
There are manual-method and CNC (Computer Numerical Control)-method CMMs. The traditional manual method involves measurement staff using a controller to operate the tool head by hand. Manual-method measurements can be time-consuming and labor-intensive.
With the evolution of IT technology, automated CNC-method operation has become widespread. In CNC-method operation, software programming, enables stable measurements. While manual-method operation may lead to measurement errors depending on the operator’s skill level, computer-controlled CNC-method operation eliminates these errors and allows for rapid measurements.
In this section, you can find out more about CMM operating methods. It explains the advantages and disadvantages of both manual-method and CNC-method CMMs, as well as their applications. When considering the implementation of a CMM, understanding the selection criteria based on operation method is crucialfor choosing the right device.
