Measure the Cam Radii of Curvature
1.  Add two CamData FunctionBlocks to the graphicarea. 
2.  Add one Graph FB 
3.  Link the CamData FunctionBlocks to the 2DCams with the rollers on the left and the right. 
4.  the Cam RadiusofCurvature output from the two CamData FunctionBlocks to two different inputconnectors of the Graph FB 
5.  To indicate to which Cam/Roller the CamData FB is linked, rename the CamData FBs to LeftRoller and RightRoller. 
Note: You can also use a Measurement FB and measure between the centre of the cam and the cam contactpoints.
Display the Graph:
1.  Doubleclick the Graph FB icon in the graphicarea. The GraphPlot opens. 
2.  Select the correct RadiusofCurvature [1 or2] for the the two cams with the Yaxis datachannel dropdown boxes [to the rightside of the graphplot area]. 
Important Notes:
Each 2DCam has two Cams: Cam 1 and Cam 2. Thus, you can also plot, RadiusofCurvature 1, and RadiusofCurvature 2.
For each Cam, use the Yaxis datachannel dropdown [to the rightside of the graphplot area] to select which Radius of Curvature you want to plot  RoC1 or RoC2?
For this model, with two different cams, there is a small '2' next to their contactpoints. Thus, we want to plot the RadiusofCurvature 2 for the two cams.
To read the radiusofcurvature values in the graphplot
2.  Move your mousepointer to the graphplot area 
3.  Drag your mouse in the graphplot area 
As you drag in the graph area...
•  the Vertical Bar moves with your mousepointer 
•  the updates so that it equals the Red Vertical Pointer and the kinematicchains follow the MMA  of course 
•  The shows the exact value[s] of the graphed variable at the red cursor 
You can edit the Minimum and Maximum graphplot values in the Graph Settings dialogbox.
I have changed the maximum and minimum of the two graphs to ±100.
Measure the Minimum and Maximum Radius of Cam Radii of Curvature
1.  Drag the Cursor Pointer to put the kinematicchain in the Dwell Segment of the motion at the maximum or minimum radius of the cam. 
2.  Read the RadiiofCurvature from the DROs 
Do Steps 1 and 2 again for the other Dwell Segment
