Lesson 4: 2D Finishing

In this lesson, learn how to use common 2D finishing strategies to create 2D toolpaths in Fusion 360.

 

Tutorial: Create 2D Finishing Toolpaths

In this tutorial, you add 2D finishing toolpaths for pockets, contours, and other prismatic features.


Create a 2D Pocket Toolpath

After roughing out the saw mold, you mill using fine passes that closely match the model surface. In this step, you create a 2D finishing toolpath for the saw pocket.

  1. If the Data Panel is not open, click Show Data Panel

    image.
  2. In the Data Panel, open CAM 4_2D Finishing from Projects Samples Workshops & Events Adoption Path ➤ Toolpath Programming ➤ 4_2D Finishing.

    TIP If toolpaths are out of date
    imageafter the design loads, choose Actions Generate Toolpath.

  3. In the CAM workspace, choose 2D Pocket.
  4. In the 2D Pocket dialog, click the Select button.
  5. In the Select Tool dialog, select Ø1/2" Flat (1/2" EM Long). Click OK.
  6. Click the Geometry tab.
    When creating 2D toolpaths, you select geometry that defines the boundary of the operation. Use the ViewCube to reorient the design so that you are facing the open pocket.
  7. Select the bottom contour of the pocket.
    image

  8. You want the toolpath to cut directly to the model geometry. On the Passes tab, clear the Stock To Leave box.
  9. Click OK to generate the toolpath.
    image

Create a 2D Contour Toolpath

A contour toolpath follows a path that matches a contour in the model. In this step, you add a 2D contour toolpath to finish the pocket shoulders.

  1. Choose 2D 2D Contour.
  2. On the Tool tab, verify that Tool is set to Ø1/2" Flat (1/2" EM Long).
  3. Click the Geometry tab.
  4. Select the two internal edges of the shoulders as the edges to machine.

    image

  5. You want to extend the toolpath past the outside edge of the part. Set the Tangential Extension Distance to 0.3 in.
  6. On the Passes tab, verify that the Stock To Leave box is clear.
  7. Click OK to generate the toolpath.

    image

Create a 2D Bore Toolpath

In this step, you finish the bore holes for the saw mold.

  1. Choose 2D Bore.
  2. On the Tool tab, verify that Tool is set to Ø1/2" Flat (1/2" EM Long).
  3. In the Bore dialog, click the Geometry tab.
  4. Select the cylindrical faces in the holes.

    image

  5. On the Passes tab, set Pitch to 0.05 in.
  6. Click OK to generate the toolpath.

    image


Create a 2D Chamfer Toolpath

2D Chamfer toolpaths are chamfer cutting passes that detect the distance from the model and automatically add retractions to avoid collisions. In this step, you create a toolpath to chamfer the top edge of the saw mold.

  1. Choose 2D 2D Chamfer.
  2. In the 2D Chamfer dialog, click the Select button.
  3. In the Select Tool dialog, select Ø3/8" Chamfer Mill (3/8" 90 Deg Drill Mill). Click OK.
  4. Click the Geometry tab.
  5. Select the outside contour.

    image

  6. On the Passes tab, set Chamfer Width to 0.05 in.
  7. Right-click in the Chamfer Tip Offset box and select Edit Expression.
  8. In the Expression dialog, enter tool_diameter/2 - chamferWidth - 0.05 in. Click OK.
    This formula sets the chamfer cut to include the outermost portion of the tool and the chamfer width. The formula calculates 0.0875 in.
  9. Click OK to generate the toolpath.

    image


Create a Drilling Toolpath

Now is a convenient time to add a drilling toolpath, even though it isn’t considered part of the finishing process.

  1. Select Drilling.
  2. In the Drill dialog, click the Select button.
  3. In the Select Tool dialog, select Ø3/4" Drill (Sample 3/4 Drill). Click OK.
  4. Click the Geometry tab.
  5. Select one of the three cylindrical hole faces.

    image

  6. In the dialog, enable Select Same Diameter.
    The other two hole faces are added to the selection.
  7. On the cycle tab, set Cycle Type to Chip Breaking - Partial Retract.
  8. Click OK to generate the toolpath.

    image

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