Over time you may want multiple dividers set at different measurements, but one is fine as a start.įigure 7-1 shows a wide range of compass types. In both cases, you’ll want it to balance being adjustable with holding its position once set. Machinist’s rules are nice, but more than you probably need.Ī compass and dividers are trickier. Triangular scales are really convenient that way, and I use a $2 "finger grip ruler". If you don’t have one and go shopping for one, consider choosing one that’s easy to pick up. You probably already have a straightedge, typically a ruler, around. Choosing a Compass, Dividers, and Straightedge The compass frequently works on neat re-use of the same measurement, while the dividers work with a more trial-and-error approach. While you can get caught up in the beauty of geometry itself, you’ll likely find that the geometry changes - and improves - the shapes of the things you create. Using the compass and straightedge will help you test ideas on paper, while using dividers will help you transfer those proportions to the reality of the pieces you build. These tools step back from the precision we expect of our machines, but they offer their own rewards. In a world obsessed with measurements, it may seem strange to lay out your projects with such simple tools. You probably remember the compass and straightedge from geometry classes, and you may have encountered dividers ("those funny compasses that don’t draw") in mechanical drawing or navigation. Many critical tools simply help you decide where to cut. Please enjoy this preview as it grows, and if you have feedback, send it to all tools shape the wood. For more on its status, please see Status of this Book. This book is not anywhere close to complete.
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