Coordinate Measuring Machine

Teacher : Ru-Li Lin

Students : 49912049 Deng-Jhong Wang

49912069 Tsai-Feng ChiangSouthern Taiwan University of Science and Technology

Outlines History The Differences of 2D And 3D CMM Measurement Plan Contact probe measurement method

Probe types Non- Contact Measuring Machine

NCMM probe types

Pets Articulated

Name of parts

Applicable industries Video Conclusions

Coordinate Measuring Mitutoyo Japan in 1968 the company launched, then in 1971 the British Rolls ‧Royce has introduced a full range of touch probes, and gradually developed into a digital

Coordinate Measuring Machine.

History

The Differences of 2D And 3D CMM

CNC Coordinate Measuring typically, the second element of manual measurements , the main difference of three million yuan more than twice the Z-axis, suitable for a large number of identical three million artifacts , the advantage of high precision, but the machine is more expensive than the two million , is three to four times more than the second element.

Measurement Plan

First, develop the workpiece surface model for the reconstruction of the means, the coordinate measuring system settings, including the

probe calibration, coordinate system

settings and scanning parameters. Then take measurements path planning,

measurement results will be measured according to plan and get on the surface, the impact on the distribution of surface measurement

data continuity is important.

Measurement System Settings And Plan

Work platform Probe calibration Coordinate System Settings Auto scan parameter settings

Measurement area is divided Select the scanning method Scan Density decision

Contact probe measurement method

When using the touch probe surface measurements, select the methods have a great impact on the results. The measuring patterns can be divided into two kinds of triggers

and continuous measurements.

Triggered measurements

General coordinate measuring instrument most commonly used .When generating signals trigger probe, the resistance of the coil will produce change, and sends a trigger signal , three-axis position detector signal is received, it will record position, but the disadvantage is slower.

Continuous measurement

Continuous measurement commonly used in surface scanning, three-axis position variation generated by the contact sent to the controller uses the probe and the workpiece, so that the probe can

be measured automatically scan

the ups and downs alongthe surface.

probe types

Mechanical probe

Trigger probe

The Differences of Mechanical And Trigger

The main mechanical contact with the workpiece surface manually, use a foot switch to trigger signal is generated, the trigger is the center of the stylus from the original location to a specific angle, resulting detection signal measurements.

Analog probe

Ring bridge type

The most stable CMM-driven approach in the center of the table, you can reduce the

impact caused by the bridge move.

Bridge type gantry

Suitable for a large amount of volume and weight of the workpiece, and high-precision gears used in very large measure the workpiece, the aerospace industry, machine spindle.

Non- Contact Measuring Machine

NCMM with a laser scanner system is represented, compared to conventional touch probe, for complex workpiece measurement more easily , so the NCMM system users is increasing.

NCMM probe types

Laser Displacement

CCD type orientation

Laser Measurement

Pets Articulated

Because of lightweight portable multi-joint ， It can be installed in any location , coordinate measuring object contours traits scan. Portability Stable and reliable Featured Measuring Hassle

Name of parts

Applicable industries

Widely used in vehicles and vehicle parts, molds, aerospace, shipbuilding, turbines

and other machinery industry.

Vehicles and vehicle parts

Aerospace

Video

ARCS 3D Coordinate Measurin

https://www.youtube.com/watch?v=CEJJyPDIqCg

ROMER Articulated Arm PCMMs

https://www.youtube.com/watch?v=SijGxj1CAs4

Baces Arm with ZEPHYR II

http://www.youtube.com/watch?v=SK-mzm1_lC4

Conclusions

Because of the measurement functions in CMM, it made a very wide range of applications such as automotive, electronics, plastics and molds, etc.With the CMM, every industry has a close relationship to promote the development.CMM industry will gradually become an important instrument in the future,Simultaneously with the reverse engineering in enterprise development, it will also become an indispensable part.

Reference

http://www.pro-3d.com.tw/pviewitem1.asp?sn=697&area=&cat=

http://www2.ctu.edu.tw/98tew/98tew2-1/ https://www.google.com.tw/search?q=%E6%9E%97%E5

%AE%88%E5%84%80--%E4%B8%89%E6%AC%A1%E5%85%83%E7%B2%BE%E5%AF%86%E6%AA%A2%E6%B8%AC

http://www.baces3d.com/ http://www.mitutoyo.com.tw/product/category.php?id=17

Thank you for your listening