Bernhard Turf Technologies: Cylinder and Reel Sharpening ...
The led balance lights show the relative position of one side of the mainshaft to the other so that a parallel grind can always be applied. The green led shows both sides are the same relative to the point at which the reset button was pressed (Where light even stone to reel contact is made across the length of the reel) An amber light on one side shows that more feed is applied on that side ...