This book draws upon the author's skills and qualifications in Sheet Metal Trades, his Certificate of Applied Science in CAD, and Diploma of Engineering in Drafting. Despite having no qualification in mathematics he has developed as a self taught student in this field, and that of pure mathematics. The bases of pure mathematics are to prove and explain why the maths works and this also is true for geometry, which is another expression of mathematics. The two are linked together and help to prove each other. This book allows ...
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This book draws upon the author's skills and qualifications in Sheet Metal Trades, his Certificate of Applied Science in CAD, and Diploma of Engineering in Drafting. Despite having no qualification in mathematics he has developed as a self taught student in this field, and that of pure mathematics. The bases of pure mathematics are to prove and explain why the maths works and this also is true for geometry, which is another expression of mathematics. The two are linked together and help to prove each other. This book allows the reader and practical sheet metal tradesperson to take the tried and tested old means of a handmade approach.
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Add this copy of Sheet Metal Mathematics and Geometry Development: to cart. $16.25, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2016 by Createspace Independent Publishing Platform.
Add this copy of Sheet Metal Mathematics and Geometry Development: to cart. $32.69, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2016 by CreateSpace Independent Publis.
Add this copy of Sheet Metal Mathematics and Geometry Development: to cart. $61.20, new condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2016 by CreateSpace Independent Publis.
This book is very disappointing.
1. The figures appear after the step-by-step construction text rather than before or wrapped with, so one has to continually flip pages back and forth.
2. The figures are evidently computer drawn and, in conversion to the printed work, lose significant resolution. In some the numerical values are hardly readable, so one has to figure out what they might be from their length and position, and the discussion (on previous pages, as mentioned).
3. There is no explanation of why he uses "12" divisions of circles and other figures. I recognize it's common in commercial sheet metal practice, but would be inappropriate for larger, more precision work (or rough work of lower precision).
4. His method for dividing a line into equal segments is remarkably complex, prone to accumulation of error, and unnecessary.
5. He treats simplistic examples, and few of them at that. There are, aside from rudimentary ones, a right circular cone, a square to round transition, a round to round transition, and a quarter sphere. All are special cases (parallel and central entry and exit, regular geometric forms), not discussing more complex and frequently-found real world cases.
5. His figures lack labels (for example, names of the views). The reader might learn something from completing the figures themselves, but it's time that could be better spent.
6. He sometimes describes a procedure in words with embedded expressions, then follows with another similar description with expressions in different form, without the text. Either, done correctly and formatted wisely, would be sufficient and more efficient.
7. His mathematical expressions are frequently bizarre and sometimes incorrect, even if interpreted favorably (for example a Pythagorean calculation of the side of a triangle is given as "sqrt(rad 40 + 60-34.641 sq) + (100 - 20 sq) = 103.305").
8. His instruction to round off to the nearest half millimeter is probably realistic for commercial sheet metal work of ordinary precision and size, but entirely unjustified in general.
9. There are no perspective views of the examples. These would help readers figure out what he's trying to accomplish. This is particularly problematic in his final example of a quarter sphere development.
In short, the reader is forced to spend a lot of effort finding out what he's trying to say, without learning anything beyond elementary methods better explained elsewhere.
