Pommels and Other Square to Round Transitions
The transitions between round and square sections are a common feature on things such as table legs and columns. Drawing them correctly in SketchUp can be a bit of a challenge if you aren’t familiar with the process but with the right tools it turns out to be quite simple. While it might not be obvious at first, drawing round tenons cut on the ends of square spindles is exactly the same process. Here’s a video to show I deal with these things.
One of the main tools for this is Follow Me. In some other tutorials I’ve done using Follow Me I’ve made the point that you sometimes need to draw the path longer than the part you need to keep. This might be the case for drawing stopped chamfers, for example. I use the analogy of starting a router bit spinning before it contacts the work and not stopping it until after the cutter has moved away from the work at the other end of the cut.
This time, when drawing the profile of the turned section of a leg or column, I tend to think of that edge as being the final cut of the lathe tool. When turning the transition at the lathe, the tool is run off the work gradually. The key to drawing that transition is to draw the profile edge in the same way. Take a look.