Recently I used to be requested about an attention-grabbing approach referred to as Inside-Out Turning, and the way this might work in SketchUp. This lathe turning course of is used for creating ornamental objects and significantly tree ornaments. Here is an easy instance: my design used to check the SketchUp course of. This object is Eight in. tall with a 3-3/8-in. dia. That general dimension set the dimension for the 4 glued blocks.
In this course of, you mix 4 similar sized blocks and glue them with paper within the joints. This permits the blocks to be disassembled, rearranged, and turned once more. There are two turnings: one to create the “inside” form and a second turning for the skin form. From what I perceive about this course of, the primary turning is completed to create the “inside” form. This is smart for the lathe work because it requires the blocks to be rearranged as soon as.
It appeared to me that SketchUp would permit a special sequence of turning and allow a extra determinate design course of. To avid turners, I understand this design concept is misplaced. Much of turning is completed with out design, fairly advert hoc shaping to suit the fabric and the attention. But my engineering background takes over, in order that I’m going to the store with all the main points in hand.
My course of in SketchUp is reversed; that’s, I do the skin turning first. I wish to know the ultimate dimension and form within the very starting of the method. This units the sizes of the blocks that shall be used. It additionally facilitates the design of the second “inside” turning that should protrude by means of outdoors pores and skin of the piece. That protrusion decides the dimensions of the “windows” by means of which the hole inside is uncovered.
In doing the “inside” turning first, you might be restricted on form, dimension, and look of the ultimate object. This appears backward to me.
Shown beneath is the primary turning utilizing the profile proven and the Follow Me Tool. Note that I did an Intersection on this full form on one quarter block. So that full form beneath is definitely 4 similar parts. The later video exhibits this course of intimately.
By having the general outdoors form and dimension, I may decide the profile form and dimension required to make the second inside turning. This second turning determines the window dimension lower and the hole form. It additionally determines the thickness of fabric left within the last design, and thus its resistance to breakage.