Segmented turning

Segmented turning, also known as polychromatic turning, is a distinctive form of woodturning that involves joining pieces of wood together to create a blank. This blank is then turned on a lathe to produce various decorative and functional objects. Unlike traditional woodturning, where a single piece of wood is shaped, segmented turning allows for the incorporation of different woods, colors, and grain patterns, leading to unique and complex designs.

Overview

Segmented turning involves the process of constructing a turning blank from smaller, precisely cut pieces of wood. These pieces are glued together to form patterns or designs before being mounted on a lathe. The technique allows for a high degree of creativity and can be used to create bowls, vases, and other cylindrical shapes with intricate patterns not possible in single-piece woodturning.

Techniques

There are several techniques within segmented turning, each offering different aesthetic and structural possibilities:

• Ring Method: Involves creating rings of segmented wood, which are then stacked and glued together to form a hollow shape. Each ring consists of several segments cut at specific angles to fit together in a circle.

• Stave Construction: Similar to the method used in barrel making, this technique involves gluing long, angled staves around a central form. This method is often used for larger pieces.

• Open Segment Turning: This technique involves leaving gaps between the segments in each ring, creating a lattice-like appearance in the final piece.

• Closed Segment Turning: In contrast to open segment turning, this method involves gluing the segments in each ring with no gaps, resulting in a solid piece.

Materials

Segmented turners often use a variety of woods to take advantage of different colors and grain patterns. Common choices include domestic hardwoods like oak, maple, and cherry, as well as exotic woods such as ebony and purpleheart. In addition to wood, some artists incorporate non-wood materials like acrylics and metals into their designs.

Design and Planning

Design and planning are crucial in segmented turning. Artists must consider the wood's color, grain, and compatibility with other pieces. Detailed plans and drawings are often created to guide the construction of the segmented blank. Advanced techniques may involve computer software to design complex patterns and calculate precise angles for cutting the segments.

Finishing

Finishing is an important step in segmented turning, as it enhances the beauty of the wood and protects the piece. Common finishing methods include sanding, sealing, and applying finishes such as oil, lacquer, or wax.

Challenges

Segmented turning presents several challenges, including the precision required in cutting and gluing the segments. Misalignments can lead to gaps or weak joints. Additionally, the complexity of some designs requires advanced planning and problem-solving skills.

Popularity

Segmented turning has grown in popularity among woodturners seeking new challenges and ways to express their creativity. It has also gained attention for its potential to use scrap wood and smaller pieces that might otherwise be wasted.

See Also

• Woodworking
• Lathe
• Craftsmanship

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