I sharpen by freehand during 40 years and I was good at it, but I noticed that all flat edges become convex over time. I experimented how I shall keep the edge flat - but it was impossible, i experimented how to not let the convex edge go more and more convex - and find out how I shall do to keep an 3 degree convex edge to keep it 3 degrees convex, this was during the sixties and seventies.
Then I read a scientific research that have give the same result as my experiance that confirm my experiance - but I think this must be common knowledge becouse it is important to understand how different sharpening processes in fact works.
I can not do this research my self and publiciize the result becouse I make sharpening tools...people should not belive the result and se it as marketing
I se this knowledge as very important to understand - and it can kill many myths about sharpening.
I know the result allready - but I like to know if it is 3 degrees, or, 2,5 or 3.5 degrees - and also how many degrees other methods wobble.
I know that also sharpening tools "wobble". I can meaasure down to 1/100 part if 1 degree - but this wobble is lesser then that - I can see it - but not meassure it.
This "wobble" is about the direction I move the sharpeners, the angle differ between forward and back drags, this differance is 1-2 1000 parts off 1 degree, not more then that. That is on my sharpening tool Chef using a 10 micron well used diamond sharpener.
Thomas
Then I read a scientific research that have give the same result as my experiance that confirm my experiance - but I think this must be common knowledge becouse it is important to understand how different sharpening processes in fact works.
I can not do this research my self and publiciize the result becouse I make sharpening tools...people should not belive the result and se it as marketing
I se this knowledge as very important to understand - and it can kill many myths about sharpening.
I know the result allready - but I like to know if it is 3 degrees, or, 2,5 or 3.5 degrees - and also how many degrees other methods wobble.
I know that also sharpening tools "wobble". I can meaasure down to 1/100 part if 1 degree - but this wobble is lesser then that - I can see it - but not meassure it.
This "wobble" is about the direction I move the sharpeners, the angle differ between forward and back drags, this differance is 1-2 1000 parts off 1 degree, not more then that. That is on my sharpening tool Chef using a 10 micron well used diamond sharpener.
Thomas