Drafting & 3D Modeling 

Starting off with two solid page-length blocks, different intrusions and extrusions are sketched in patterns and in various shapes. 

I worked backwards and constructed isometric sketches (in half scale) from the given orthographic projections, and used what I know about hidden lines to help me with the missing views as well.

Transitioning to non-grid paper, I used a straightedge and compass to create this orthographic projection of a Dovetail Slide, including the hidden lines and center lines. 

A difficult part of creating the isometric sketch of the crane was estimating the dimensions. I had to experiment with the measurements a couple of times before finally deciding on making the height 18, the width as 27, and the depth as 10. As you can see, the crane is made up of several different shapes, such as cylinders, rectangular prisms, trapezoidal prisms, and dowels.

Since I did the isometric sketch first, I referenced the isometric to draw the orthographic projection. Using centerlines and hidden lines, I indicated the missing views, dowels, and cylinders in the projection. Once drawing all the views, I labeled at least 20 of the main and small features.

By using the isometric sketch and the measurements labelled in the orthographic, I created the 3D model of the crane on OnShape. I first made 3 sketches: one for the base components, one for the wheel, and a third for the lift and hook. Once I filleted a majority of the edges and edited the appearance, I rearranged all the parts in the assembly, used the Revolue Mate to attach the lift to the dowel and the wheels to the dowl, and fixed all other parts in place.