Moving the Workplane Origin

Turn the view to Top view, then view the model in Wireframe display mode.

From the WorkPlane menu, select Show Workplane.

Move the Workplane to the position shown below. Workplanes were discussed and demonstrated in more detail in Session 5.

Please Note

Because the object is cylindrical, no midpoint will be found. Use instead the intersection of the construction line and the edge, shown below.

If the vertical construction line is too short to create an intersection with the bottom edge, use the Extend (Dynamic) tool.

Model viewed from Top view, Workplane origin seated as shown

Drawing the Slots

Make sure the Workplane snap is enabled. Use Windows > Snaps to do this.

Turn the view to an orthographic view such as Front then view the model in Shaded display mode. The model can also be set to Transparency mode for higher visual clarity. Position the cursor over the model, right click and select Transparency.

Reduce the zoom magnification slightly, then insert 2 concentric circles onto the center of the object with diameters of 62 and 52, shown below.

Alignment Angle

Make sure an alignment angle of 30° is enabled in Preferences > Snap. This was discussed and demonstrated in greater detail in Session 2.

Start a Single Line from the center of the circles, allowing the LogiCursor to track to 30°, shown below. Allow the line to extend beyond the newly created concentric circles.

Drawing the lines at 30° angles from the center

Repeat this for the opposite angle so that a corresponding line at -30° extends beyond the circles, shown below. In the illustration below, the regions are highlighted for illustrative clarity only.

Lines drawn at 30 angles to intersect the concentric circles

Trim

Modify | Trim | Trim

The Trim tool trims lines, arcs of circles to a defined boundary edge.

The keyboard SHIFT key is used to select multiple objects and can be used to add or remove objects to the selection.

Select the Trim tool from the toolbar of use Modify | Trim | Trim.

Use the Trim tool so that only the regions shown shaded above remain from the concentric circles and the angled lines.

It may be necessary to remove the Face On snap. Use the Window > Snaps to do this.

First region for slot created | view rotated for illustrative clarity

Extrude Solid (midplane)

Draw | Solid from Curves | Extrude Solid

This extrusion tool sweeps a 2D profile in a plane perpendicular to the Workplane to create a 3D object.

A bi-directional extrusion can be created which creates an equidistant above and below Workplane extrusion.

Closed profiles only can be extruded.

When closed objects within the profile are selected as part of the profile, the volume of the extruded inner objects will be subtracted from the primary solid.

Select the Extrude Solid tool, then turn the view to Front. TAB to the Distance field and input 13.  Make sure the option is set to Midplane.

Using a left-to-right pick window, select the sketch objects which form the first slot, shown below.

Selecting the objects to extrude by their midplane

The result when viewed from a Top and Isometric view is shown below.

First wheel slot extruded