Mike Darlow's Woodturning Series: Useful Woodturning Projects. Mike Darlow. Читать онлайн. Newlib. NEWLIB.NET

Автор: Mike Darlow
Издательство: Ingram
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isbn: 9781607659150
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few tens of hours to achieve competence in the conventional techniques. What the advertising for these tools omits is that their use restricts a turner’s vocabulary of forms, lengthens the time to turn a design, and also requires more sanding. These disadvantages are however less significant to bowl and vessel turners than turners of useful items which are often spindles or incorporate them. Therefore promoting these tools must have favored a relative expansion in non-useful turning.

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      1.2.3 The misbelief that the range of useful turnings is small

      Some turners complain that the range of useful turnings is very limited. This book’s projects may partially dispel that belief, but represent only the tip of a very large iceberg. There are many other sources of ideas for useful turnings if you’re prepared to search. Figure 1.7 illustrates just one source—the criticism that some of the uses listed are obsolete is valid, but not necessarily critical.

      1.2.4 Wood supply and properties

      Wood is becoming relatively more expensive, and the range of available species is declining as is the supply of the straight-grained wood preferred for many useful turnings. In contrast, bowls and vessels can be produced from no- and low-cost found wood.

      The decline in professional turning is in part because wood was earlier the only feasible material able to fulfill particular uses. Now these and other uses can be satisfied more cheaply by using materials which do not occur in nature, notably plastic. These substitute materials can also be more practical: wood doesn’t fare well in dishwashers.

      1.2.5 Useful turning is perceived as less creative and of lower status

      By the early 19th century artists and their patrons had persuaded society that art really consisted of the Fine Arts which stimulated an emotional response and even edified behavior, and craft which had more mundane ambitions and consequences. This concept remains powerful today. Hence David Regester’s rueful comment: “the idea that the spindle turner [typically a producer of useful turnings] is an inferior beast to the bowl turner [a supposed creator of Fine Art]”.5 Not surprisingly, fewer aspire to be an “inferior beast”.

      1.2.6 Woodturning skills

      Another statement from Michael Dunbar:2

      Modern turning also differs from old-time turning in that turners no longer make large numbers of the same object. In other words they do not do a lot of duplication.

      Exact duplication is undesirable if you’re a turner of Fine Art, but there are two largely-true beliefs which discourage some from attempting useful turning:

      • It can require some of the equipment and skills used in cabinetmaking and/or joinery. (Fortunately the growth in woodturning clubs and other communal woodworking facilities including Mens Sheds and SheSheds has improved access to these for turners who don’t have the necessary other woodworking equipment themselves.)

      • It requires a greater range of turning competence than does non-useful turning.

      Is it difficult to achieve competence in the conventional turning techniques? Dale Nish in his book Creative Woodturning seems to think so because he states that the cutting method “can be learned only with much practice and patience on the part of the learner. . . The personal satisfaction and sense of achievement derived from a mastering of the cutting method is enjoyed by only a few master woodturners. This goal is something the beginner might set for himself.”3

      But go back in time, and you’ll find that turning was regarded as a low-status, low skill trade: “The turning lathe was, and still is, despised as unworthy of a skilled worker”.6 This statement by Gustav Ecke is too damning, but it is true that hand woodturning is not among the most difficult of hand skills. It does not require the high innate artistry of figurative woodcarving, nor the cabinetmakers’ ability to use a large range of machines and hand tools to achieve snug fits. Therefore I believe that Nish exaggerates the difficulty of achieving the level of turning competence required for success in useful turning.

      How long does it take to acquire a basic range of turning skills? If you don’t have any bad turning habits to unlearn and the teaching is sound, in my experience it’s about 20 hours of tuition and 20 hours of disciplined practice. Obviously, improvement will continue thereafter, but that 40 hours should provide a sound foundation on which to build greater speed and sureness. Alas, only a minority seem to be prepared to make that commitment. It is true that for many turning is a pastime or a social activity, but should that preclude the initial commitment of a mere 40 hours for a hobby which might be pursued for decades? Perhaps because the true situation isn’t explained to them, beginners mistakenly believe that all-round turning competence is beyond them.

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      Malcolm Gladwell in the second chapter of his popular 2008 book Outliers opined that to fulfill a person’s potential for demanding activities such as computer programing, violin playing to concern standard, lawyering, etc. needs about 10,000 hours of practicing, equivalent to 5 year’s full-time.7 Woodturning is a far less demanding activity, and therefore much less than 10,000 hours is needed for the enthusiastic amateur to achieve competence.

      Two factors which Gladwell doesn’t properly cover are:

      • The asymptotic nature of acquiring skill through instruction and practice. (An asymptote is a ‘straight line which is approached more and more closely by a curve, but not met by it.) As figure 1.8 illustrates, acceptable competence can be achieved in only a small proportion of the time needed for mastery.

      • Learning and practicing inferior rather than optimal techniques ensures that only partial competence can be achieved. To later achieve high competence would require ingrained suboptimal techniques to be “unlearned” before the optimal techniques could be learned.

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      Tuition

      Woodturning involves manipulating a sharp edge and usually an adjacent bevel against wood moving at high velocity. Turning is peculiar that the risk of a catch can only be reduced by increasing one’s turning competence, not by taking more but thinner cuts. And a person’s turning competence is strongly related to the quality of the techniques learnt and to the commitment to continue to replicate them.

      Teachers typically teach the techniques which they themselves use. These techniques may not be optimal. I doubt that there is an international consensus on which techniques are optimal and their exact details. Further, there is a reluctance to objectively compare the conflicting techniques promoted