The objectives are to edit the four dimensions in the Design-Set, and
•Make sure the maximum radius of the smaller cam does not exceed :
•Minimize the Pressure-Angle
We will use a Cam-Data FB and a Graph FB to plot the Pressure Angle and the Radius-of-Curvature* to find the maximum radius of the Cam.
Note: * We could also use a Measurement FB to measure between the the center of the Cam-Shaft and the contact-point between the Cam and the Cam-Roller.
STEP 1: Edit the 2D-Cam to display only the Inner cam.
STEP 2: Add a Cam-Data FB and Graph FB to the graphic-area
A Cam-Data FB and a Graph FB are now in the graphic-area.
STEP 3: Link the 2D-Cam in the model with the Cam-Data FB
The 2D-Cam is now linked to the Cam-Data FB.
STEP 4: Connect wires from the Cam-Data FB to the Graph FB (see image above)
Y-Axis Data Channel
We need to make sure we are looking at the Radius of Curvature of the Inside Cam in the plot.
STEP 5: In the Graph interface, select Inside RoC (see image above)
The Y-axis scale for the Radius-of-Curvature can have a massive range - from plus to minus infinity.
It is easier to use the plot if we set the Minimum and Maximum values of each Y-input with the Graph-Settings
STEP 6: Open the Graph-Settings dialog
STEP 7: Edit the Minimum and Maximum Scales for each Plot.
I would normally set the maximum and minimum Pressure-Angle values to ±35.
However, the Pressure-Angle is very biased to a large negative value. Hence, we can set a large range, and reduce it as the Pressure-Angle improves.