All right, John. You've teased us enough, now tell us the whole story about this tool that's accurate to one-half of a bees-dick.
On Nov 30, 2009, at 8:07 AM, JDM wrote:
G'day fellahs,What do other vision-impaired woodworkers do to mark a scribe line on the exact center edge or face of a board? Do you use some system of successive approximation? Measuring the width, then halving it, making a mark, then testing it? And, then after drilling, finding that the hole is a sixteenth, an eighth or a bees-dick out of exact center? And then, feeling mightily disappointed?If you, like me, have had problems finding the exact centerline of a boards edge or face, for the purpose of drilling, nailing or dowelling, then, I have an impeccable answer. It is 99.99% accurate every time!But, maybe you already know the answer, and I'm merely offering to teach my Grandmother how to knit socks, suck eggs or distill Moonshine?But, if not, I can tell you how to make a small tool in your own workshop, that will find the exact centerline on the edge or face of any board that you are likely to use in your day to day wood work.The tool is simply an application of the rule about right-angle triangles. Which is, that a line that bisects the base line of a right angle triangle at 90º, also intersects the hypotenuse at its mid-point. Please let me know if you are interested to know more about how to make this handy tool? Me? I never enter my workshop or leave home without it!John Melbourne Australia.
Larry Martin woodworkingfortheblind@xxxxxxxxxxx
