# engineering a protractor

 Forum topic by lizardhead posted 03-09-2012 07:47 PM 3054 views 0 times favorited 12 replies
 lizardhead652 posts in 3083 days 03-09-2012 07:47 PM I do segmented turning, so I use angles, problem is with a small protractor the margin for error is very minuet, respectfully a very large protractor would have a larger margin for error. I want to take a 24” x 24” piece of MDF and make a large protractor to cut some angled jigs for my miter slider on my band-saw. My thinking is that if 45 degrees is 1/2 of 90 then the angle would be ticked out on my MDF at from lower left to upper right, OK that’s a no brainer, now if using that 24” square and 45 degree figures I would divide 24” into 45. = 9/16” Take that answer and multiply by the number of degrees I want 15 and I get 8”, so if I rise 8” from the lower right the angle from that point to the lower left should be 15 degrees. Close but not right. What am I wrong about. And if you plan on giving me vectors and X’s & Y’s & C2R & qfb’s don’t bother I do not care to go to school. If that’s the only way to get there then there is no bother to explain other that “THERE IS NO OTHER WAY” They have a website angles for Dummies, but I am not as smart as a Dummy. -- Good, Better, Best--Never let it rest---Always make your Good be Better & your Better Best