In fiber engineering, there is no such thing as a "one-size-fits-all" tool. Raw wool varies vastly across breeds, defined primarily by its mean fiber diameter—measured in microns ($\mu m$)—and staple length. The core efficiency of a wool comb is determined by a single mechanical variable: tine spacing. At fotool, our S, M, and L series are not just scaled versions of the same design; they are engineered with calculated gap ratios to manage specific fiber physics.
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| THE FOTOOL METRIC SYSTEM |
| [L Series] =======> Coarse/Long Carpet Wools (>35 microns) |
| [M Series] =======> Medium/Down-Type Breeds (24-34 microns) |
| [S Series] =======> Ultra-Fine/Luxury Fibers (<23 microns) |
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1. The Mechanics of Resistance and "The Jamming Point"
When processing raw fleece, the space between the high-carbon steel tines must accommodate both the fibers and the residual vegetable matter (VM) or grease.
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Too Narrow: If fine-pitched tines are forced into coarse wool, the accumulation of high-micron fibers creates excessive friction. This reaches a "jamming point," causing severe fiber breakage and unnecessary structural stress on the comb handle.
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Too Wide: Conversely, if fine wool (like Merino) passes through widely spaced tines, the fibers experience zero control. They bypass the alignment field completely, leaving short fibers (noils) and tangles untouched.
2. Engineering the S/M/L Matrix: Finding the Optimal Vector
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The L Series (Wide Spacing): Designed for long-wool breeds (e.g., Lincoln, Wensleydale) and coarse carpet wools, typically above 35 microns. The wider gap allows long, robust locks to pass through without tearing, effectively sorting long staples from dense vm without jamming.
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The M Series (Standard Spacing): Optimized for medium wools, down breeds, and general blending (e.g., Corriedale, Romney), ranging between 24 and 34 microns. This pitch balances pulling resistance with alignment control, making it the bedrock workstation tool for multi-breed processing.
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The S Series (Fine Pitch): Engineered specifically for luxury, ultra-fine short fibers under 23 microns (e.g., Merino, Cashmere, Angora). The ultra-dense tine matrix ensures that even the microscopic crimp of fine wool is captured, aligned, and cleaned of microscopic dust particles.
3. Maximizing Yield through Pitch Selection
Choosing the correct pitch directly impacts your final processing yield. Using the correct fotool model minimizes the number of passes required to achieve a perfect, spinning-ready top. Fewer passes mean less friction, less static buildup, and a significantly lower percentage of waste fibers trapped in the combs.
Conclusion:
Precision fiber preparation requires matching the physics of the fiber to the geometry of the tool. By understanding the micro-measurement of your fleece, you can select the exact fotool specification required to preserve fiber length and optimize spinning efficiency.
