What is CMM? and what types of Coordinate Measuring Machine?

What is CMM ?

The full form of CMM is Coordinate Measuring Machine. It is an advanced measurement machine that works for measure complex and large components. CMM is a device for measuring the physical characteristics of an object. The machine is controlled by a computer or an operator.

CMM consists of 3-axis namely X-axis, Y-axis, Z-axis. Measurement is done by the prob attached to a third moving axis. This prob could be mechanical, optical, laser or white light.

So, the machine who takes reading in 6 DOF(Degree of freedom) known as CMM.

Learn all about CMM in our online course of Coordinate Measuring machine.

Types of CMM

There are four basic types of stationary CMM:

Bridge.
Cantilever.
Horizontal Arm.
Gantry.

Bridge type CMM

Bridge CMMs are the most common type of coordinate measuring machine.

It is used for High accuracy, moderate flexibility, for medium-sized components.

Cantilever CMM

Cantilever CMMs differ from the bridge style in that the measuring head is only attached on one side of a rigid base.

This type of CMM is used for Highest Accuracy, Lowest Flexibility, for small-sized components.

Horizontal arm CMM

Horizontal arm CMMs are less accurate than the other types of CMM. because of their design. However, it also makes them useful for measuring large workpieces or components.

This is used for the Lowest accuracy, Highest flexibility, for very large components. Learn all about CMM in our online course of Coordinate Measuring machines.

Gantry CMM

Gantry CMMs are designed similar to bridge type CMMs, but tend to be much larger.

Gantry CMM is used for High accuracy, Moderate flexibility for large components.

Probs of CMM

CMM probes are available in three main forms:

Touch-Trigger probes
Displacement Measuring CMM probes
Proximity or Non-contact Probes

What is CMM? and what types of Coordinate Measuring Machine?

What is CMM ?