The Beading on the HIghboy

comments (4) May 6th, 2014 in blogs

Killenwood Tim Killen, contributor
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This is the lower section of a William & Mary Highboy. There are many details to work out on a complex piece like this one. For example, there is a thin beading that is applied to the scroll work on the Front and Side. It's one thing to do this in SketchUp, quite another to implement in the shop.

I suppose there are many ways of creating this beading in SketchUp, and I'll show you the method I ended up doing. Below there is a video of this process.

I copied three components - the Front, Post, and Side and moved them over to right. Then exploded the Front component so that I could use it's scroll shape to make the path for a Follow Me. I also scaled these three pieces by a factor of 10, so that I would not have the chance of small facets creating nuisance gaps and holes in the extruded shape. 

I also cut the front piece in half. This provides a convenient perpendicular face for the extrusion. It also simplifies the modeling due to the symmetry of the Front component.

As shown below, I then created the face and cross-sectional shape of the beading.


I selected the path, but first had to add lines across the front of the Post and around the lower corner of the Side components. Therefore, the beading would continue around the corner of the highboy.

Here is the final beading after re scaling by 0.1. The color ended up in reverse, so this is easily changed by triple clicking the Beading, right clicking, and picking Reverse Colors from the menu.


This shows the beading as it rounds the corner of the High Boy.




posted in: blogs, Sketchup, beading, highboy

Comments (4)

Killenwood Killenwood writes: Thanks Dave, I did use circles for the scroll work in the front piece. Therefore the model as shown in my picture is indicative of 24 sides. My turnings are also based on a circle path and therefore have 24 sides.

Posted: 2:56 pm on May 7th

DaveRichards DaveRichards writes: The default number of sides for circles in 24 and the default for arcs is 12.
Posted: 12:35 pm on May 7th

Killenwood Killenwood writes: David, I believe the default is 24 sides. I rarely increase this value as it can significantly degrade the performance of the modeling. Although these segments can be seen in the close up view, I don't think this impacts any of the engineering detail necessary for building the piece.
I'm modeling for its benefit to construction in the shop for me and my students. Therefore, the default value works better for me.

Posted: 10:21 am on May 7th

David_Heim David_Heim writes: One small refinement to Tim's bead-making method: When creating the outer arches on the case, I'd increase the number of segments in the arc (SketchUp's default is 12 segments, I believe). As you can see from one of the images above, those arches look a little rough when viewed close up; a smoother arc would help there.
I should have followed this advice, too, when I created this model, which Tim is using as the basis for the project. One lives and one learns.

Posted: 7:27 am on May 7th

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