jshelton5040 -> RE: The challenge issued by my school teacher (Mar. 1 2011 21:57:33)
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ORIGINAL: estebanana Pattern makers chisels are called pattern makers chisels because there is no such thing as pattern makers sandpaper. I'm pretty sure traditionally trained pattern makers, cabinet makers are trained first with planes and admonished to learn how to square up stock without sandpaper. I really don't see any logic to an argument otherwise. I also don't shun power tool use, I have plenty of them. The point is that if you want to fabricate a guitar with jigs fine, but to train someone without taking them through a traditional route which backs up power tool use with a working knowledge of the hand tools that preceded them is fundumentally wrong. And here's why, it develops a faulty platform of skills from which to grow. If a person wants to go on to do repair work a knowledge and skill of how to work with all the hand tools to a high degree is an absolute skill one must have. Every thing stems from the makers expertise in hand eye work and power tools are only a mechanized extension of that skill set. Sandpaper joints technically has serious problems. At a microscopic level sanding is an act of removal of material by means of abrasion not and act of cutting. Two main problems are inherent in sanding whether it's by hand of machine: It macerates, (read chews) the surface of the work and closes the grain and pores of the wood. In this process the surface of the work become rounded, this can happen at a micro and macro level. Planing and scraping are cutting processes which remove material by paring it. When wood is pared rather than macerated the grain structure is parted in a more reliable plane and the structure of the wood and grain is not mashed over, but is left open to more effectively take glues. Planing & scraping produces both a flatter and truer surface, and a better gluing surface. Luthiers have known this since before the 16th century. In fact anyone from 150,000 years ago who split open a chunk of flint to make a blade to chop bones and skin would have known the difference between abrasion and parting. There's an old canard...if I want to know what time it is don't tell me how to build a clock. The kid wants to build a couple of guitars not become a luthier. Maybe after he's done some building it will inspire him to go ahead and learn the trade.
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