Cartesian Distance Video

Learn how Cartesian Distance works in Calypso

Cartesian Distance

Click on Size / Distance or Form and Location / Cartesian Distance

In this example, the “Primary Datum” is the same as the “Spatial Rotation” and “Secondary Datum” is the same as the “Planar Rotation” inside an alignment. Selecting “Parallel To” or “Perpendicular” specifies the axis direction. i.e. the “X”, “Y” or “Z” axis

NOTE: In Calypso whenever two features are recalled, the first feature defines the feature origin and the second feature defines the orientation of the feature.

Example:

If the Circle is the first input and Plane1 the second input. The initial distance orientation will be defined by Plane1. Further control is offered by defining the Primary and Secondary Datum

Simple Distance

Select Form and Location/ Distance/ Simple Distance

The holes are checked to each along a Datum Reference Frame. In this case the Base Alignment. That means the X and Y axes of this Characteristic are normal (parallel) to the Base Alignment X and Y.

Alignment with Offset Plane

The offset plane can be used in an alignment construction. A good example of an offset plane is cast datum points, where they are rarely on the same plane.

Offset Plane

The first step is to probe 3 Space Points on the model at different heights. If you have a CAD model change the feature type selection to Define a Space Point and place 3 points on the model at different heights, i.e. the cast datum points.

Click on Features/ Additional Features/ Offset Plane      

Click on Evaluation

Click on the Edit button at Point Modification

Point A1 in our example is at 0

·        Enter 0 in Point 1

·        Enter -10.00 in Point 2

·        Enter -8.00 in Point 3

This is the method to create an offset plane. It can now be used in a Base Alignment, or as you would any feature.

CAD TRANSFORMATION

Selecting Features From The CAD Model

Please load the CMM Quarterly model by clicking on CAD/ Load Model and navigating to the model.

You may use your own model and part if you wish. Make sure your first part is a verily prismatic part. Something square without a lot of curved surfaces to begin with. Just apply the same principles to your part program.

Move the CAD Origin

Our first step after importing the CAD model is to make sure the alignment is in the proper location. The CAD alignment on the model must match the blueprint. In addition, the CAD model must be rotated as the part sits on the CMM table.

In this example the origin must be moved to the corner of the part.

We will need to extract some features off the model to obtain the nominals from the model in order to move the origin to the correct location.

Click on the lower toolbar and select Extract Features.

Pick all three of the planes on the example and create an Intersection (Construction/ Intersection) of the three planes

Open the Intersection

Click on CAD/ Modification/ CAD Model Transformation