Recently, I came to know about a group buy for a custom 65% keyboard, the Space65 by Gray Studio. It’s a very beautifully finished keyboard, with a number of details that make the keyboard stand out from the crowd.
One of those details that I found interesting is the recessed chamfer at the back of the keyboard. Since I’m learning Fusion360 to design and 3D print my own cases with, I wanted to try remaking this feature.
We have a quite detailed reference to work with. For this step-by-step tutorial, let’s make a simple case and work from there.
Start by making a sketch. Draw a Center Rectangle and make it 120mm wide and 60mm deep.
In order to replicate the case, I chose to apply a Fillet to the case edges. While you can apply a fillet in the 3D view, it won’t be the same as when you apply it in the drawing. Doing it in 2D allows the chamfer we apply later to maintain an even width around the corners.
Next, we Extrude the case, making a Body. I chose to make it 12mm high.
Next, pick one of the short sides, right click it and choose Create Sketch. I’ve drawn three lines: One from the top edge of the case where the fillet from earlier starts to the corner; another line that extends to the bottom; and a line connecting the two.
Apply the Equal relationship to two of the lines, securing it in place and making sure that the oblique line sits at an angle of 45°.
Next, Extrude the triangle. To let it start within the case instead of at the triangle, pick a negative Offset of -20mm. I then chose a Distance of 25mm.
Next, apply a Chamfer to the edges of the case. I chose a distance of 1mm.
Now we need to smooth the edges of the recessed chamfer. To do that, we can use the Draft feature.
First, we need to choose the plane that we’ll draft along. We’ll choose the plane that was created by the extrude from earlier.
Then we need to choose the faces to Draft. You may hold the
Control key to perform a multiple-selection. Select the two faces that are perpendicular to the plane we just selected.
Last, pick an angle to Draft with. I picked a high angle of 70°, making the transition smoother.
I like to apply a small Fillet to all case edges to make it a bit more friendly to handle. Select all edges dragging a rectangle over the entire model, then pick a low fillet value. I chose for a value of 0.25mm.
For the render, I applied an ABS material and chose a teal colour for it. It highlights the faces cleanly.
With these steps, you can now apply a recessed chamfer to your designs as well! I’m glad with how it turned out.