Sets parameters for the design of a disc cam.
Click Calculate to perform the calculation of geometric parameters.
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Access: |
Ribbon:
Design tab
Power Transmission panel
Disc Cam
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Cam
Specifies parameters of the cam. Use the pull-down menu to select Component or No Model Option. If you select Component, the Cylindrical Face and Start Plane commands are enabled. If you select No Model, the commands are not available.
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Component |
Creates a new component. |
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No Model |
Inserts only calculation. |
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Cylindrical Face |
Specifies a cylindrical face or axis. |
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Start Plane |
Specifies the start face or work plane. Click Flip to flip the orientation of start plane. |
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Preview |
Displays the graphical image of the disc cam. Note: Displayed image depends on the follower type selected in More Options (Translating or Swinging Arm type of follower).
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Follower
Specifies parameters of the follower.
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Roller Radius |
Radius of a roller. |
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Roller Width |
Width of roller (only for cylinder shape). |
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Eccentricity |
Follower eccentricity from the center of cam. |
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Pivot Distance |
Distance of swinging center of rotation from the cam center. |
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Arm Length |
Length of swinging arm. |
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Reaction Arm |
Length of reaction arm. |
Actual Segment
Specifies parameters of cam segments.
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Actual Segment |
Use the pull-down menu to select actual segment. |
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Motion Function |
Use the selection list to select the appropriate motion. Click Plus (Add) to open the Add Motion dialog box where you can specify your own motion, which is added to the list. Other commands are available only when a motion is selected in the list. The Minus (Delete) command deletes current/selected user motion. |
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Add Before |
Adds segment before the currently selected segment. |
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Delete |
Deletes current segment. |
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Add After |
Adds segment after the currently selected segment. |
Graphic display of segments area
As you select a button on the toolbar, a corresponding quantity graph displays in this area. To turn off the display of a graph, clear the selection.
If you place the cursor above the graphs area, a tooltip displays with graph values that correspond to units of the actual cursor position.
You can select the cam segment in an index in the combo box in the Actual Segment area, or by click an appropriate position in the graph area.
Zoom switches on/off the zoom to the cam element graphs only.
Save graph data to file saves all graph data and data about the cam profile and follower path to the tab delimited text file. You can open the saved data in the Microsoft Excel spreadsheet, if desired. Following columns are generated:
- Cam position [deg]
- Lift [mm]
- Speed [mps]
- Acceleration [m/s 2 ]
- Pulse [m/s 3 ]
- Pressure Angle [deg]
- Follower Force [N]
- Normal Force [N]
- Torque [N m]
- Radius of Curvature [mm]
- Specific Pressure [MPa]
- Profile angle [deg] - polar coordinates
- Profile radius [mm]
- Profile X coordinate [mm] - Cartesian coordinates
- Profile Y coordinate [mm]
- Follower path angle [deg] - polar coordinates
- Follower path radius [mm]
- Follower path X coordinate [mm] - Cartesian coordinates
- Follower path Y coordinate [mm]
(More)
Displays additional options for cam design.
Number of Split Points
Gives an accurate, detailed cam calculation, export values (the Calculation option), and part accuracy when inserting into Autodesk Inventor (the Model option). The angle between drawn points is specified by number of points on a circle (360 points means a 1 degree angle distance of points).
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Calculation |
Number of calculated points. |
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Model |
Number of points generated in Autodesk Inventor. |
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Cam Direction |
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Select cam direction of clockwise or counterclockwise. |
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Path Type |
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Click to select the path type. The direction of the path type affects calculation and the Autodesk Inventor model. |
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Inner |
Only lower/inner part. |
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Outer |
Only upper/outer part. |
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Both |
Both parts. |
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Follower Type |
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Select the type of the follower. |
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Translating |
Designs a follower with translation motion. |
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Swinging Arm |
Designs a follower with arc path of motion. |
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Follower Shape |
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Select the shape of the follower. |
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Cylinder |
Designs follower of cylindrical shape. |
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Sphere |
Designs follower of spherical shape. |
Results
To display the Results area on the right side of the Calculation and Design tabs, double-click the double line on the right or click the chevron.
The area displays the limiting values of calculated parameters, result of strength check, and cam shape. Values are calculated when the Calculate command is pressed.
Following output parameters are displayed on the Results pane:
- Results
- Max. Lift (h max )
- Min. Lift (h min )
- Max. Pressure Angle (γ max )
- Min. Pressure Angle (γ min )
- Max. Speed (v max )
- Max. Acceleration (a max )
- Min. Acceleration (a min )
- Segment
- Motion Start Position (l 0 )
- Lift at Start (h 0 )
- Max. Acceleration (a max )
- Min. Acceleration (a min )
- Max. Pulse (j max )
- Min. Pulse (j min )
- Max. Follower Force (F max )
- Min. Follower Force (F min )
- Max. Normal Force (Fn max )
- Min. Normal Force (Fn min )
- Max. Torque (T max )
- Min. Curvature Radius (+) (Rc min )
- Min. Curvature Radius (-) (Rc min2 )
- Max. Specific Pressure (p max )
Summary of Messages
Displays the reports about calculation. To open the Summary of Messages area at the bottom of the Calculation and Design tabs, double-click the double line at the bottom of tabs or click the chevron at the bottom of the tabs.