how to use a french curve in woodworking
In the proto-CAD (Computer Aided Design) world, draftsmen and drafting women have to rely on a set of curved patterns when they need to connect two or more points through an arc. or graceful curves. Where a simple arc, drawn with a compass, cannot be cut, the designer will draw curved patterns and try to find a curve among the many possible curves. an elegant sweep line to connect point A with B. France. Curves also have a clear place in woodworking. From helping in scaling the piece’s curves on the artboard to the fully scaled layout of the parts on the stock. While some woodworkers have large printers that can create full scale drawings that one can cut and transfer onto wood, most of us still need to pull out our pencils, rulers, compasses, and templates. French curves to do the job correctly. Read: How to Use French Curves in Woodworking In the last few years, two amazing sets of French curves have hit the market. These tools, one by Lee Valley and the other by Crucible Tools, an affiliate of Lost Art Press, have proven to be a good solution to our curvature needs. In fact, I have never seen such formidable curves in all my design career. Their size is really their big advantage as you can rely on them to draw Queen, Chippendale and the rest of straight classic canon curves on your mahogany or plywood medium. Just take a curve and try to find an elegant stroke to connect the design landmarks.Read more: How to tell what’s going on in Spanish In the picture above you can see the Veritas set we bought for our woodworking program. We use the giant template to set up curves on all sorts of projects but one of our primary needs was to draw an ellipse for our seat. Teaching the technique of drawing an ellipse with a string tied between the nails is fun and practical, but when time is short, I like to show students the curves and explain how to use them. First, we draw the long axis of the ellipse, then we intersect it with the short axis of the ellipse.
Then we look for a suitable curve to draw the quadrant of the ellipse. When looking for the right curve, aim for the curve that becomes the tangent to the rectangle that frames the ellipse. In other words, each quadrant needs to be fluid as it connects to its neighbors.
Once you find such a curve, make sure to delineate its boundaries. Many people use pencil marks on the start and end of the curve but I like to use masking tape that I fold over to the other side of the pattern. I do this to save the hassle of erasing pencil strokes later. Read more: How to wire a double breaker with 10-2 . wire
The masking tape technique is also useful when you are flipping the pattern to draw mirror quadrants. For greater clarity – which masking edge marks the end of the curve – you can cut and glue small masking tape triangles, or just use the pointed end and represent the relevant edge of the masking tape.
After the four quadrants are drawn, we peel off the tape and glue the patterns for future use. My final piece of advice: Lee Valley samples are unfinished so I recommend finishing them off with some protective oil or varnish.
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