Tag: cmm

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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 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

Mitutoyo cantilever cmm
Mitutoyo shop-Flore 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 cmm
Swan 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.

Gantry cmm
Image: Mitutoyo

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

Read More about Probs of CMM

Read more about Principles and Parts of CMM

Learn Coordinate Measuring Machine

  • Learn the Basics of Coordinate Measuring Machine
  • Learn principle, parts, terminology, types of probs of CMM
  • Learn the basics of the standard used for Calibration of CMM

Read More about the Online CMM Course

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CMM |Types of CMM probs

CMM probs convert physical measurements into electrical signals. CMM probes have a wide classification for direct and comparative measurements.

mitutoyo probs

CMM probes are available in three main forms:

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

Learn CMM

Touch-Trigger probes

Renishaw Touch-Trigger probes

Touch-trigger probes are the most common type. They actually touch the surface of the work-piece, and open contact, send a signal with the coordinates of the point to the CMM.

mitutoyo cmm

The probe is than backed off and move to the next location where the process is repeated.

Displacement measuring CMM probes

senser prob

Displacement measuring CMM probes are also known as scanning probes. This method generally involves passing the prob over a target surface at its working range. As the probe scans the surface, it transmits the continuous flow of data to the measurement system.

Scanning contact probes many use LVDT(Linear variable differential transformer) or optoelectronic position sensing.

senser scanning by mitutoyo

Proximity or non-contact probes

Proximity or non-contact probes function similarly to displacement measuring CMM probes, but they use laser, capacitive or video measurement technology instead of LVDT’s.

Types of CMM

There are four basic types of stationary CMM:

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

Read More about Types of CMM

Learn CMM: Check here for an online course

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Basics of CMM(Coordinate Measuring Machine)

What is CMM?

CMM(Coordinate Measuring Machine) is an advanced measurement machine that works to 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. Learn more

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.

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
crysta plus mitutoyo cmm

This is Mitutoyo’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

Read more about Prob of CMM

Types of CMM

There are four basic types of stationary CMM:

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

Read More about Types of CMM