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Export a smooth Cam
You calculate the Cam-Coordinates with a Cam-Data FB.
Note: This topic was written before Save as Biarcs was developed for 2D-Cams. Each BiArcs is tangent to two adjacent BiArcs. You can save the Cam with BiArcs as a DXF or export it directly to SolidWorks.
Also, you can also Save as STEP, TXT, and SLDCRV file-types.
In the Cam-Coordinate Data dialog, you should calculate the Cam-Coordinates as:
•Equal increments of the Master Machine Angle - say 360 for a typical 'side-plate' size of cam.
Send Cam Data to SolidWorks button.
Make sure the SolidWorks is open, and a Part, existing or new, is the active document.
The data is sent to SolidWorks as a Curve Feature.
The Curve feature shows on the XY-Plane, which is the Front View in SOLIDWORKS.
Note: To move the Curve feature to the XZ or the YZ Plane, then in the Cam-Coordinated dialog-box:
1.Click the Save as button, and save the Data as a TXT file.
2.Edit the data in Excel, and swap the X-data, or Y-data, with the Z-data.
3.Save the Data to NotePad
Then, in SOLIDWORKS:
4.Click Insert menu > Curve > Curve Through XYZ Points...
1.Select a Plane that is coplanar or parallel to the Curve feature.
2.Start a sketch on the Plane
3.Use Convert Entities in SolidWorks® sketch editor
4.Extrude the Curve.
You can see the Cam does not have any facets.
1.Open the file, with file-type as... *.TXT
2.Select delimiter, as a ',' or 'tab'.
You want the 'X' and 'Y' Cam Points in separate columns.
Experiment with the import options if necessary.
3.Tidy up the data, remove headers etc.
4.Move all the data so the first X Point starts at Cell A1, and the first Y Point at B1.
5.Add a Column for the Z-Axis, and fill it with Zeros (0).
6.If necessary, make the first and last point to be identical.
Experiment as necessary. Some CAD will close the cam for you, other CAD will not.
7.If necessary, scale the Cam-Data to the units you are working in your CAD
8.Save your data as an Excel® spreadsheet, for back-up purposes.
9.Save your Data to a NotePad® file.
You will use the file that you save in Excel® or NotePad® to import into your CAD.
Insert Object / Curve by Table
1.Surfacing tab → Curves group → Keypoint → Curve By Table
2.On the Insert Object dialog-box, set the Create from File option and click OK.
Browse to and Open your Excel® spreadsheet
Curve by Table uses an Excel spreadsheet to define a construction curve. The spreadsheet, which is embedded in the Solid Edge document, allows you to more easily import your data.
Solid Edge: Curve by Table Parameters dialog
Curve by Table Parameters
Creates line segments between the data points in the table.
Applies the direct curve fit method to the data points in the table. Using this method, the curve passes directly through the points.
Applies the 'least squares' curve fit method to the data points in the table. Selecting this option enables the tolerance drop list. Using this method, the curve path is controlled by the tolerance value and does need to touch the points.
Allows you to specify a tolerance for the Smoothing On option. Gives the maximum distance the curve can deviate from the points.
Curve End Conditions
Allows you to specify an open curve. For example, the first and last data points do not touch each other or any part of the curve.
Specifies a closed curve. For example, the first and last data points can touch one another or any part of the curve. When this option is set, the Periodic and Natural options become available.
Connects the first data point with the last data point to make a smooth tangent closed curve.
Creates a closed curve without a tangency condition.
Note: The 'Curve by Table' Feature will fail if the first and last data points in the spreadsheet are coincident. If you select 'Closed', delete the last point in the table that is coincident with the first.
Allows you to select coordinate systems to offset the curve data to. Make the coordinate system prior to creating the curve through table of points.
Records the total number-of-points in spreadsheet.
Possible Problems with Curve by Table
The following are possible error messages resulting from Curve by Table:
•Invalid Geometry: Edit Feature Inputs
The data points in the spreadsheet are incorrect. Check the spreadsheet and make certain you have input at least two rows of X,Y,Z coordinates, have not skipped any cells, and have not entered data points that define a curve that runs back through itself either in 2D or 3D.
•Curve Is Self Intersecting
The curve runs back through itself in 2D or 3D. Change the data points in the spreadsheet.
•Units Set Out Of Range
The units are too large. Make sure the diameter of the model is less than five kilometers.
•Curve By Table Feature Failed
Closed and Periodic options are set on the Curve Table Parameters dialog box, and the first and last data points in the spreadsheet are coincident. Change one of the coincident data points.