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Training
CMM Manager CAD Alignment
Written by Mark Boucher Consulting   

 

The CAD Alignment method is to establish a minimum of 6 points on the model then measure these same points on the part.

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Does your cmm software report concentricity correctly ?
Written by Ray Xing   

Recently I provided a one day customized GD&T training to one of my customers, who’s been in pump manufacturing business for long time. Their drawings are very old school because you can tell from all those GD&T symbols, e.g. datum letter is before tolerance in FCF, etc..

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Cylinder, The Basics
Written by Administrator   

A cylinder has a total of three surfaces: a top, bottom, and middle. The top and bottom, which are circles, are easy to visualize. The third is actually the curved wall of the cylinder. It is a surface that has measurable volume.

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Circle
Written by Mark Boucher   

What is it?

Circles are simply closed curves. Where points along the curve converge to close the curve and the results are a circle.

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Filtering of Scanned Data
Written by Mark Boucher, CMM Quarterly   

With all instruments used for scanning, i.e. roundness machines and surface roughness gages, when scanning with a CMM the raw data must be filtered. When using a CMM to scan features on a part there are data filtering options that can affect the scanning results.

The software default selections may not always be the best option. As CMM programmers, when software messes with our data we better have a good understanding of what is going on with that data. Understanding filtering is key when faced with the multiple filtering options available.

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Understanding the 6 Degrees of Freedom
Written by Mark Boucher, CMM Quarterly   
Using The Correct Alignment Principles 

 

Understanding the principle of the 6 degrees of freedom is essential to aligning your part correctly on the Coordinate Measuring Machine (CMM).
When a part is placed on the CMM the location of the part is not known.  It must be defined by using several features known as datums
.

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