Hi Philip, Thanks for your help, ideed the grinding wheel touched only the top of the bevel. I tried to adjust the arm and use the marker technic but it was very hard to match perfectly the blade and the grinder, especially since the adjustment of the arm is not precise at all. It took me all afternoon to find the right adjustment ^^', if you have a technic to find it more easily I would appriciate it (for future adujstment). Anyway, I think now it is ok. Thank you again, Joanna