Knife Box – Williamsburg, Part 2
My last blog entry set the stage for building this Knife Box, one that was presented at the January Williamsburg conference “Working Wood in the 18th Century”. This video is second in the series covering the initial steps in creating the SketchUp model.
The compound angles of the box make the modeling work more challenging. The tracing process over a photograph image produces flat faces that are orthographic. In other words, the traced faces are projections of the real splayed out components. The projection does not represent the full width of the component when in the splayed position. Therefore, there is some extra work to find the real width of the side and end components.
The 3D modeling also uncovers an issue at the corner joints; that the parts are too short to fully overlap. So the End and Side components need to be extended in length slightly to ensure a full overlap for the future dovetail joinery.
Screen 1: The traced over shapes positioned on the Box base. Note no splay.
Screen 2: My method shown in the following video for finding the real size of the splayed End and Side components. First step is pulling out the shapes to overlap in the corner. Then making faces at the splayed compound angle.
Screen 3: Using the Intersection feature, and removing the waste shows components at the correct splay and size.
Screen 4: Close-up view of the corner, showing the issue that the components do not fully overlap at the corner.
Screen 5: Increasing the length of each component to ensure adequate overlap. These extended lengths are required for milling of blank pieces in the shop.
Here is the 12 minute video.