Calypso - Point Recall with LOOP

 

This will create a wall thickness 360° around the part top and bottom 8 points each.

To read the article click this link.

https://cmm-quarterly.squarespace.com/articles/calypso-point-recall-with-loop

The current CMM Quarterly training programs on Teachable.

https://cmm-quarterly.teachable.com

Calypso Basic Training 1, 2, & 3

Calypso CAD Model Training

GD&T and Calypso

CMM Manager DCC Training 1, 2, & 3

All training come with downloadable videos and pdfs. Train at your own pace.

Using the Virtual Probe Method

When calibrating a stylus tip in Calypso software it is recommended that you use Dynamic Tensor calibration at least in the initial calibration. This allows Calypso to gather the “bend data” of each individual stylus. Tensor or Geometric calibration may be used for recalibration purposes.

 

When using Dynamic Tensor calibration is not uncommon to receive this type of error.

This error requires you to rotate the reference sphere so that Calypso can access an unobstructed path around the reference sphere. To resolve this you may have reloaded the master probe and re-reference the sphere location. Then reloaded the stylus system and went through the entire calibration process.

 

Next time, try this procedure.

Creating a Set of Virtual Reference Spheres

Within the Stylus System Qualification dialog box click on the Reference Sphere Management icon.

This will open the Reference Sphere Management dialog. It is here that you will create the Virtual Reference Sphere positions. You may create as many positions as you would like. Below in Table 1 are listed the most used positions and these rotations might be a good start.

Above is your default Reference Sphere position screen. We will now add the Virtual Reference Sphere positions. To begin, click on the Copy as Virtual Reference Sphere button. This will bring up this next prompt.

Calypso will automatically select the next number for the reference sphere. Leave the number as is and click ok.

 

Now another reference sphere is added.

Change the Rotation Angle, in this case to 135 degrees, and Click Apply.

Let’s add another position. Click back on number 1 in the list and repeat the steps. Click on the Copy as Virtual Reference Sphere button. Name this one #3 and click ok. Highlight #3 in the list and change the rotation angle to 225.00 degrees and click Apply.

Repeat the steps until all of the positions are created.

Note: Inclination will be 135 on all examples

Ref Sphere Position           Rotation

1                                           45 

2                                          135

3                                          225

4                                          315

5                                          0

6                                          90

7                                          180

8                                          270

Remember all these steps where done to circumvent this error during calibration. Once you have completed the above steps it is not necessary to do them again. They will be stored for future use.

 

Using a Virtual Reference Sphere Position during calibration

The stylus will do a tensor calibration before this error appears.

Once this error has occurred change the Mode to Dyn. Tensor Re-qualification Mode.

Rotate the Master Sphere on the CMM table to the desired position that will allow for a dynamic calibration. It is important to just rotate around the existing position on the table. Do move it to some other location just rotate it around where it is currently located.

 

Open the Reference Sphere Management dialog

Now select the corresponding Virtual Reference Sphere that matches the new position on the table

Click Activate. This will now make, in this example, #3 active

You can now see that the Reference Sphere is Sphere #3

Now click on the Qualify Stylus button.

You are prompted to move the stylus and touch the stylus in the direction of the shaft.

 

This will now begin the dynamic tensor calibration. This is the scanning of the master ball since the tensor calibration portion was already completed prior to the error

The calibration is complete. Notice the Dynamic Qualification check mark is present and the Mode has changed back to Dynamic Tensor.

 

 

 

NOTE: By using the virtual sphere procedure, you first measure all styli in one position of the reference sphere and only then rotate the sphere to carry out the dynamic stylus qualification. Otherwise, you would have to re-qualify the sphere each time again.

PiWeb Reporting




Zeiss has added a new report feature that is fantastic. Calypso 6.0 now has the ability to expanding your reporting options. We will cover these options. Please note that PiWeb Reporting is only part of a larger optional reporting package PiWeb Reporting Plus.


PiWeb Reporting and Multiple Printout


After creating your CMM program you may want to add an additional report format. For example, you may currently have a company report format that contains your specific input parameters but in addition to that you may want to have a report that has the plots embedded within the report and a compressed format.


We will show you how to do that within this article.

PiWeb Reporting – Standard Format

Click on the link below to go to CMM Quarterly




How to setup the Standard Format Report in PiWeb Reporting

Calypso - Form Datum

What the Form Datum does is establish a FUNCTIONAL Datum Reference Frame coordinate system, similar to if you were setting up the primary, secondary, and tertiary datums on a functional checking gage. This is ONLY for a datum reference frame and does not modify how the base and secondary alignments evaluate their respective coordinate system. In the screen shot below, you can notice the different origin points are for a base alignment and datum reference frame.

To set the Form Datum correctly click on Extras/ Settings/ Measurement/ Form Datum, check both the Outer Tangential Element and the Re. Calculation as per ISO 5459 boxes.

What is happening?

When we create our base alignment the alignment uses the intersection point of your features as below.

This is based on the measurement of the actual features of the part.

Form Datum uses the highest contact points that would touch a Datum Feature Simulator, in order of primary, secondary, and tertiary features, establish a real coordinate system. Calypso will establish the proper location through the form datum reference calculation per ISO 5459. Again this is ONLY used for a Datum Reference Frame and does not affect the Base Alignment.

Form Datum Applied.

As you can imagine this will affect your location and true position results.

Want to learn more

Bilateral Equal Tolerance - Calypso

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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