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Cam design requires good interactive cam analysis.
Once you have built a mechanism and added a cam and designed a preliminary motion on a part, you start to use analysis to optimize your design. This involves editing the motion to ensure correct functionality; for example, reducing product impact velocities, deciding how much time you need to generate suction for gripping. When designing motion you must also pay attention to pressure angle and curvature.
Pressure Angle is important as this determines what proportion of force will be applied to driving the load and what will just load bearings. Low pressure angle is generally good.
Radius of Curvature is also important. If too low, then the cam may undercut, also sub surface stresses will increase at low curvature.
You can also change link lengths and roller radius to improve performance
If you know mass properties of the mechanism and any external loads, MechDesigner will calculate joint forces and graph them on-the-fly as you make your edits.
The you can calculate cam contact stresses to identify where in the cam you may have fatigue
You can easily analyze Cams for:
- Pressure Angle,
- Radius of Curvature,
- Contact Force,
- Maximum Contact Shear Stress.