Sharpness Tester

I watched the video where they performed a slicing cut on a business card, so more than sharpness was being tested at that point, they would have to factor in edge geometry for deep slices. A screaming sharp axe head would require more force than a screaming sharp thin stock stamped blade.

Interesting for sure.
 
Probably computer sampling/reading of torque exert on the neck of the cutting device holder. That system looks like a prototype...
 
While not bad in theory its has some flaws, you being the one making the cut is the biggest flaw and can greatly change the results.
 
The (potentially) most useful thing I see in this, is the ability of the system's software to plot data points (1 to 50 points per second). One of their setups is geared to applying the cut with the knife in-hand, and another setup used with the knife held in a vise, which is then moved linearly down a ramp during the cut. The hand-held setup, combined with a graph of force exerted in each applied cut, might be useful in figuring out efficiency of the user's cutting technique (same blade held/pushed/drawn at varying angles or directions, plotting the pressure exerted during each cut). The vise-held setup would obviously be useful in comparing one knife's physical characteristics (sharpness, geometry) against the same characteristics of another blade, with both held at an equal and consistent angle, moving at a fixed rate during the cut.

That aside, the site's FAQ is indeed quite pathetic. :D

If only I had a couple or three grand to throw away; might be interesting to play with.


David
 
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