CMM Quarterly Publications

This book allows you to teach yourself the basics of Zeiss Calypso. Through this manual you learn such topics as alignment setups, probe qualification, measuring features, defining characteristics, and much more. You will also learn how to program with or without CAD models,

This manual includes instructional videos.
This book covers all revisions from 5.0 and including 5.6

We do offer Over the Web training to assist in any questions you have.

Discounts are available for multiple purchases. Please contact us directly at cmmquarterly@gmail.com for more information.
This book sells for $500.00 USD plus $10.00 shipping



Bilateral Equal Profile

A common question about profile is, if I take the minimum and the maximum values of my profile output they don’t add up to the profile results value. What is happening with the profile calculation?


Let’s look at one of the profile tolerance zone shapes.
Bilateral (Equal Distribution)

Let’s break down this picture above:
The black line is the Nominal Geometry.
The green line is the actual profile.

The blue lines are as designated, the upper and lower tolerance lines. Taking the blueprint tolerance and dividing that number by two, i.e. 0.10 is +/- 0.05 will assign the position of these lines.
The red lines are the actual reported profile deviation. This is where things won’t seem to add up. If my min is -0.0006 and my max is 0.0009 why is it not reported as 0.0015? Instead Calypso reports the profile as 0.0018. Calypso takes the point with the greatest deviation from the nominal geometry and doubles that result for the actual profile result.
Where A is the absolute value of either the min or the max the actual profile deviation = 2xA. 
1.     Find the maximum value, or the largest deviation toward the outside of the part
2.     Find the minimum value, or the largest deviation toward the inside of the part
3.     A = The largest absolute vale of either the min, or max
4.     Reported Actual profile deviation = 2xA
Max:    .0009
Min:   -.0006
A = 0.0009
Profile Actual = 2xA = 0.0018

 NOTE FROM EDITOR: Although this article is focused on Calypso this formula is used in all softwares to calculate Bilateral Equal Distribution.

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Tolerancing Curve Form Segments

Creating different tolerance bands on a Curve Form graph


If your looking to create a graph with a tolerance variation just follow these steps.


The first step is to generate a curve then we will apply the tolerance variations.





Click on the arrow below the Clearance Group pull down menu and begin to move through the list to identify the points where the tolerance bands change. Write these numbers down.















Now open the tolerance fly out from the curve dialog box by clicking on the arrow.

















Check the Segment Tolerances

Click on Settings

When you click on Settings the follow dialog box will open. Your last point will be listed in the list.











Click on the Create Tolerance Segments icon




Begin to fill in the Start and End point values.


Enter the tolerances associated with these points.










In our example the values will look like this

1 to 299 +/- 0.180

300 to 1059  +/- 0.090

1060 to 1569 +/- 0.180

1570 to 1800 +/- 0.090


After the first entry this dialog box will appear. Answer YES the first time to remove the last point in the list. After each subsequent entry answer NO or your previous entry will be removed.





This is what the list begins to look like.

























To assist you as you define the tolerance bands you can right click on the CAD window and select Show Tolerance Lines.

Create a Curve Form Characteristic by clicking on Form and Location/ Curve Form. Open the Curve Form and select the curve as the Feature.








Open the characteristic and click on the Graphic icon. The graphic will appear like this.







Calypso Sheet Metal Part 1

Calypso offers a variety of sheet metal functions and yet these options are rarely shown in an OEM training class. These measurement techniques may also be used outside of sheet metal applications to better define a measurement strategy.
Circle
Let's say that your part flexes like sheet metal does, this makes it difficult controlling the probe depth when measuring the diameter. Three points around a diameter will help in controlling a consistent probing depth. Calypso will actually use the nominal of the feature to define where these three points should be measured.

In the circle dialog box click the Projection button, currently it show None

Now select the Working Plane Tab

Define as desired. Set the D2 radius value, as you can see the value is from the nominal edge of the diameter out onto the part. The D1 is the depth the probe  will measure the feature.

Because this is a relative measurement function the depth will be consistant no matter where the flexing moves the feature. We will cover more sheet metal applications in future articles.

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Searching for References for Selected Features

Finding the features used in Characteristics

This tip allows you to find a feature used in Characteristics in your feature list. Select a Characteristic and right-click on the mouse and choose References for selected Features
















A dialog box will open. Find the desired feature and double-click and the feature list will open highlighting the desired feature.