FreeCAD Tutorial 1c: Design of an Electronic Box, Continued

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Introduction

This tutorial continues the sequence for designing a sample electronics box to demonstrate how to use FreeCAD.

In the previous tutorials, most of the basic tools have already been addressed. In the steps that follow, knowledge of these tools will be assumed. If you are unfamiliar with any of these tools, you may want to review the previous entries in this sequence.

In the previous tutorials in this sequence, a thin-walled box was designed with mounting lugs attached to the bottom face. The first step in this tutorial is to add some additional lugs around the top of the box that could be used to attach a lid to the box. The operations to do this are mostly the same as those used in the previous tutorial. Accordingly, we will move quickly through this first operation until we need to use some new functions.

The box is shown with the plane of the top edge selected, ready to open a new sketch.

Attach Lugs to the Box Edge

Using the () "External Geometry" selection tool select the four inside edges of the box. These are needed in this sketch to locate the rectangular features we will add.