[QUOTE=Chef Niloc;233323]Wait, I have a 2 questions that I don't think has been addressed regarding kens demo. 1) why the hell would you have to set the platen to any degree of a angle? I mean at any degree is it not still the flat platen and edge angle going to be the same?
Assuming that I am on the mark.....
For sharpening, My Belt grinder's platten is set at angle ( Platten is not parallel to the belt) so that one end is almost in contact adn the other end further away form the belt. The greater the slack, the greater the convexity and also the secondary edge . The closer the platten is to the belt less slack and less convexity with smaller secondary edge.
I also put the vertical grinder at 10 degrees so that when when I run the blade at 0 degrees ( knife upright with edge facing down) I have 10 degrees and with it tilted slightly towards me.. it wld be greater than 10 degrees.
Hope that this answers your question.