Online edge finder

Sam Salvati · Sep 21, 2009

http://www.amblesideprimary.com/ambleweb/mentalmaths/protractor.html

Found this today, looked for my protractor but could not find it. This works quite well for finding edge angles, hold your blade up to the screen and sight along the edge.

mete · Sep 21, 2009

Cut out a section of the blade and put it on an optical compariter then measurements are easy !!

Javelin · Sep 21, 2009

apparently I keep my 1920s case single spey blade at 12 degrees

Roger999 · Sep 22, 2009

I don't get how you are doing this, could you post a picture of it how you measure it? The edge is too small to measure with just my eyes........

Leu Custom · Sep 22, 2009

Roger999 said:
I don't get how you are doing this, could you post a picture of it how you measure it? The edge is too small to measure with just my eyes........

Skip the into and use one of the choice and put the spine of your blade up to the screen and use the screens protractor ! Would help if your screen's resolution isn't super high

Roger999 · Sep 22, 2009

My screen resolution is at 1920X1080, I don't want to accidentally stab my monitor lol, do you put the tip or spine against the screen? I don't understand how you can measure the the edge angle by putting the spine against it

.

Halecky Knives · Sep 22, 2009

Tried the protractor, but now my blade is stuck in the screen. I'll stick to my brown and sharpe protractor in the future

Leu Custom · Sep 22, 2009

Roger999 said:
My screen resolution is at 1920X1080, I don't want to accidentally stab my monitor lol, do you put the tip or spine against the screen? I don't understand how you can measure the the edge angle by putting the spine against it .

I'm gonna assume you're kidding about not knowing how to do this, but just in case you are serious this is what I did.

Took one of my knives (which happened to be chisel ground)

and then measured the angle of the grind using the protractor on the screen !

by putting the spine (which is flat against the screen) till the bottom of the blade flat side
lined up with the 0 degree line of the online protractor.

this one is at a 20 degree chisel grind.

Roger999 · Sep 23, 2009

What if it's a flat ground blade with a secondary bevel, how will you measure the edge angle?

EDIT: I took a picture, what angle is it?

.......

Leu Custom · Sep 23, 2009

now that looks much much harder to estimate ! Perhaps this is a situation where it would be easier to use the spine and guestamate !

Keith_H · Sep 23, 2009

The make the angle game is pretty fun. I am pretty good at it. When I was at camp we learnt some rifle drill and the instructor said that port arms is roughly 45 degrees, I said it was 20-ish...