I’m working on another Windsor – this time a fan back arm chair. This style, as shown below in a rough model, includes a curved crest rail which captures the top of the spindles and turned stiles.
Creating the crest rail in SketchUp has always been a challenge, but I’ve located a free plug-in that helps considerably. This Ruby script is called Joint Push Pull or jointpushpull.rb. The standard SketchUp Push/Pull Tool is extremely effective, but not so when applying to a curved component such as the crest rail.
The Joint Push Pull plug-in is designed to work where the standard tool fails, that is on curved components – it offsets each face of a curved component along the face normals, then fills in the gaps to create a contiguous shape.
Here’s how I used it on the Crest Rail…..
First I created a curved shape of the crest rail as shown here. The problem now is to create the crest thickness of 11/16-in.
I selected the face of the crest, then clicked on the Joint Push/Pull tool. You can place your cursor anywhere on the face of the selected component, then click and push. I typed in 3/4-in. for the desired thickness. (I had to change a setting in the plug-in to save the original face.)
Below I’ve captured the screen during this operation. You can also see the Tool Bar for the Joint Push/Pull plug-in.
The resulting crest rail is shown below and much better quality than I’ve achieved with previous procedures.
I found several download locations for this plug-in including SketchUcation Community Forum and SketchUp Pro Google Groups, but I believe there are others available by doing a Google search on jointpushpull.rb. Also through this search I found a handy, but highly technical, PDF user manual for the plug-in.
I’m sure to find additional applications for this useful plug-in.