In the automotive industry, accuracy is vital because if components aren’t measured correctly, they may not function as they should and can present safety risks.
Hand tools will sometimes serve the purpose, but they have limited accuracy and can be time-consuming. Coordinate measuring machines (CMMs) are another option that can often prove more suitable.
So, what is a coordinate measuring machine, and how does a CMM work? Keep reading to find out.
What Is a Coordinate Measuring Machine?
A CMM is a device often used in the automotive industry (and several others) to take accurate measurements. Depending on the type, some can measure items more than 10m.
CMM is a contact model that takes measurements using a touch probe. Alternatively, they can be non-contact and use cameras or lasers for measurements.
CMM Machine Benefits
One of the main benefits of coordinate measuring technology is its accuracy. It offers a level of precision that most other machines can’t achieve, so it can be one of the best options when there’s a low degree of acceptable tolerance.
For example, calipers or micrometers are unsuitable for measuring the 3D coordinates of a specific point from a virtual starting point. A CMM can easily do this.
Even other advanced machines are usually not ideal for certain types of measurements, such as:
- Using virtual points
- Using virtual lines
- Geometric tolerances
For this reason, there is wide use of CMM in manufacturing.
Design of a CCM
CMMs are most often bridge or gantry machines. They have a spherical contact point on a probe tip, which is used to take measurements of three dimensions.
There are various accessories for CMM machines that can be used for different situations, including:
- The stylus/probe tip, which is often made of hard materials such as roby or zirconium
- Granite table, which is durable and helps achieve a high degree of precision
- Fittings to hold the measuring disc in the correct position
- Compressors and air dryers, which are found on standard bridge and gantry CMMs
There’s also software for CMMs, and there are currently two types available. One type is software that individual CMM manufacturers develop. The other is third-party software that other manufacturers can use on their machines.
Applications of a CMM
CMMs are often used in manufacturing for various purposes. Some of the most common include:
- Quality control
- Reverse engineering
- Statistical process control (SPC)
- Instrument alignment
- Prototyping
- Assembly
CMMs have a wide range of applications as they can take different kinds of measurements, such as:
- Lengths
- Diameters
- Points
- Free-form parts
- Geometric relationships
- Metal die castings
- Turbines
- Gears
These machines are used in various industries, such as automotive, aerospace, medical, construction, and more.
Using CMMs
Now you’re no longer wondering, “What is a coordinate measuring machine?” and may have decided it’s right for your project. If so, Nova Stevensville can help.
We’re a world-class producer of plastic molding components. We use the latest technologies (including CMM) to create the highest-quality parts. Our team has over 100 years of collective experience, which allows us to meet custom needs and adhere to punctual delivery times. Contact us today for your free quote.
