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+--- Thread: 3 degrees wobble (/showthread.php?tid=347)
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3 degrees wobble - Edgepal - 07-11-2018
My experiance is that freehand sharpening wobble minimum 3 degrees and that it is impossible for the human hands to come below 3 degrees wobble.
I have also read a scientific research that also say this dor meny years ago - but I cannot find that research now.
I think that a new research about this are important to do.
3 degree wobble = freehand sharpening = both hands free in the air, knife in ine hand, sharpener in the the other hand.
2 degree wobble when the sharpener are fixed and stabile and the knife are hand hold with 1 hand
1-2 degree wobble when the sharpener are fixed and stabile and the knife are hanshold with 2 hands
0 degree wobble when both tha sharpener and the knife are fixed in position in a stabile sharpening tool.
This is my experiances - but my experiances are not scientific...
Also;
Freehand sharpening, semi freehand sharpening, one hand, two hands...we need words for different types/ways of sharpening...that also give, or describe, how much wobble there is...?
A research like this will soon be Basic knowledge I think and it will also kill a lot of myths about sharpening.
Is it possible to make a sientific research like this here on BESS Forum?
It will be hard discussed with much anger and resistance - but also much accepted and i think loved - and it will absolutley market the BESS Forum
Thomas
RE: 3 degrees wobble - grepper - 07-11-2018
I know I can't hold a steady angle hand held, especially going around the tip and flipping the knife from one side to the other. Nowhere even close. I don't know the exact number of degrees, but I have no doubt there is significant variation.
I'm sure there are some folks who might be pretty good at it, but for me a guided system of some sort is much faster, more accurate and produces a far more consistent edge.
RE: 3 degrees wobble - Edgepal - 07-11-2018
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
RE: 3 degrees wobble - EOU - 07-12-2018
It would be an interesting study Thomas but not exactly sure "who" would be studied or "how". Our best bet would be that just like sawing a straight line with a handsaw, some can and most can't.
RE: 3 degrees wobble - Edgepal - 07-13-2018
That is my point EOU, no one can sharpen by freehand without wobble - but some think they can, some know they cannot. Those who knows they cannot can develop and learn more, those who think they can have stop learning.
I like to help also them to develop and learn more.
Thomas
RE: 3 degrees wobble - grepper - 07-13-2018
You are a true sage and bastion of wisdom and generosity Mr. Thomas. I agree with you 100%.
RE: 3 degrees wobble - Edgepal - 07-14-2018
I have learn that when we humans think we know something - we also stop learning about what we think we know.
But - when we really know and understand something - we understand that we still have a lot to learn...
People that have halv knowledge know so little that they think they know everything...and stop learning.
Example. 3 years after people have got their driving licens they think that they are exelent drivers and that other people cant drive at all - and that is also when most people die in car accidents... = lack of knowledge and understanding of knowledge kills them.
Thomas
RE: 3 degrees wobble - grepper - 07-14-2018
Another great utterance, "When we humans think we know something - we also stop learning about what we think we know. But - when we really know and understand something - we understand that we still have a lot to learn..."
You should write a book.
RE: 3 degrees wobble - Larrin - 07-14-2018
The problem with writing a book in life philosophy is you quickly learn that everything you have to say has been said by someone else already.
RE: 3 degrees wobble - Geno - 10-11-2018
I think what you where looking for is already in existence Mr Thomas https://www.youtube.com/watch?v=84ReMZbopis