<< Click to Display Table of Contents >> Navigation: Getting Started Tutorials - MechDesigner > Tutorial 6: Cams: Flat, Barrel, Globoidal, 'Slot' > 6A1: Rotating Cam & Cam-Roller Follower > Step 6A.8: Get the 2D-Cam Coordinate Data |
To link a 2D-Cam to a Cam-Data FB and plot Pressure Angle.
This step will:
1.Add a Cam-Data FB
2.Link the Cam-Data FB to the 2D-Cam
3.Plot the Pressure Angle of the 2D-Cam with a Graph FB
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STEP 1: Click Kinematic-FBs toolbar > Add Cam-Data FB |
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STEP 2: Click in the graphic-area The Cam-Data FB is larger than other Function-Blocks. It has five output-connectors. We must link it to a 2D-Cam. |
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STEP 1: Double-Click the Cam-Data FB that is in the graphic-area The Cam-Coordinates dialog-box open. <<< the image is the Cam-Coordinates dialog-box. |
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Link the 2D-Cam to the Cam-Data FB. STEP 2: Click the 2D-Cam - in the graphic-area or the Assembly-Tree The name of the 2D-Cam shows in the Selected Cam-Track box STEP 3: Click We will open the Cam-Coordinates dialog again, when we want to calculate the Coordinates of the 2D-Cam |
![]() Cam Data FB output-connectors |
There are five(5) output-connectors from the Cam-Data FB < see image to see the output from each output-connector. To calculate the Contact-Force and Contact-Stress between the Cam and the Cam-Follower, the Parts in the Following System must have mass and inertia properties. We have not added mass or inertia to the Parts. We can analyze the Pressure Angle, Radius-of-Curvature, and Entrainment Velocity. In this tutorial we will analyze the Pressure-Angle. STEP 1: Drag a wire from the Cam-Data FB Pressure-Angle output-connector to a Graph FB The Pressure-Angle of a Cam is an important parameter to analyze. A high Pressure-Angle, means that the force is not transferred from the cam to cam-follower very efficiently. The Pressure-Angle imposes extra forces on the machine elements in the Cam and the Cam-Follower systems. The forces increase rapidly when the Pressure-Angle is greater than 40° (an arbitrary angle as it depends on what is being driven by the cam). Many designers aim to keep the Pressure-Angle to less than 30°. See Tutorial Forces 13 for force analysis. |