Parting-off the Part

In the following section of the tutorial we will generate a NC program for parting-off the part. In order to select the Cutoff operation, the below described steps must be performed.

Create a Cuttoff Toolpath

Ensure the file type (NC Format) for our Cutoff example program is ISO Turning.

Then select the feature Cutoff Turning by clicking on the Cutoff icon in the Turning Operations toolbar.

This will open the Cutoff Turning pane to the left of the drawing area. Now insert the values shown in the dialog below.

The Cutoff is defined by the above parameters, after the entry of which the screen will look something like the one shown below.

The three values entered are shown as a vertical line on the drawing.

Click on the button Parameters in the Cutoff Turning pane to open the parameters dialog. Enter the following values into the parameter dialogs shown below.

Cutting Tab

Configures cutting parameters for the operation.

• Tool Side: Use these two icons to define the right side of the tool as the cutting side.

• Tool Corner Radius: The corner radius of the tool.

• Tool Width: The width of the tool used for the operation.

• Entry Amount: The length that the tool will start the cut above Start Depth X.

• Retract Amount: The length that the tool will pull free along the radial direction at the end of the cut.

• Compensation Type: The compensation type that is used for the operation. The two most commonly used are Controller or Computer.

• Compensation Side: The compensation side that should be used in the operation.

• Use Pecking: By selecting this option the operation will be performed with pecking movements.

• Pecking: When Use Pecking is selected, use this button to open a new window to define the cutoof pecking parameters.

Corner Geometry Tab

Configures the geometry of the corner - sharp, round, chamfer.

• None: Select this option to perform a straight down cut with no corner machining (square corner).

• Corner Radius: Select this option if a rounded corner should be machined with the specified Corner Radius.

• Chamfer: Select this option if a chamfered corner should be machined with the specified Angle and Width/Height. Round corners for the chamfer can be defined with the Inner/Outer Radius values.

• Use Clearance Cut: Check this option if a clearance cut should be done to clear the corner fillet/chamfer before the cutoff operation is performed.

• Stepover: This is the amount of material removed in each clearance cut.

• Stock to Leave Z: Is the amount of material that will be left in the Z-direction after the clearance operation is performed.

• Use Pecking: By selecting this option the clearance cut will be performed with pecking movements.

• Pecking: When Use Pecking is selected, use this button to open a new window to define the clearance pecking parameters.

Click on OK to use the values and close the dialog.

Try experimenting with the various parameters and see how they change the generated toolpath.

Exporting the Toolpath and Backplot in the Editor

Click on Export Clipboard in order to generate the actual program. The program is now in the computer's clipboard and is ready to be inserted into the CNC program.

Change the window to the NC program and move the cursor to the very end by pressing Ctrl+End. Insert the text from the clipboard, either by pressing Ctrl+V, or selecting the icon Paste from the Edit toolbar in the Editor tab.

Now the NC program should look like the following screen.

To verify the generated toolpath, we must simulate it using the integrated Graphical Backplot.

To open the backplot window, click on the Backplot tab at the top of the Ribbon and then on the Backplot Window icon in the File toolbar.

Nu visas ett fönster som det nedan.

Spara Nu NC-programmet som CNC-Calc Svarvningshandledning 2.NC.