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Basics of CMM(Coordinate Measuring Machine)

What is CMM?

CMM(Coordinate Measuring Machine) is an advanced measurement machine works for measure complex and large component. 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.

Or Watch out this Video

Components of CMM

The 3 main component of CMM are-

1. Machine itself (includes its 3-axis)
2. Probing System
3. Controllers & Softwares

Working Principle of CMM

CMM record X, Y, Z coordinates of the object and generate point which analysis by regression algorithm. This points are collected by Prob via direct computer control.

Main Parts of CMM

• Air Bearing
• Scales & Encoders
• Prob system
• Servo motors
• Joystick
• Machine control system
• Software

This is Mitutoyoâ€™s manual floating bridge type CMM coordinate measuring machines designed to achieve very high accuracy in a wide range of applications.The model type is CRYSTA-PLUS M is the intelligent alternative to the complex, cost-intensive measuring equipment with conventional  multi-point measuring devices.

Pros of CMM

• Single Setup
• Accuracy
• Improved Productivity
• Reduced Setup Time

Probs of CMM

CMM probes are available in three main forms:

1. Touch-Trigger probes
2. Displacement Measuring CMM probes
3. Proximity or Non-contact Probes

Types of CMM

There are four basic types of stationary CMM:

• Bridge.
• Cantilever.
• Horizontal Arm.
• Gantry.

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5 thoughts on “Basics of CMM(Coordinate Measuring Machine)”

1. Good explain

1. Thanks Vishal

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