woodfarmer
Established Member
Whenever I get styrations like that it can nearly always be fixed by sharpening the tool.
When it starts to get blunt, the amount of wood cut by the edge starts to vary a lot when the hardness of the wood starts to vary. So it will remove more of the softer wood than the harder wood. This will cause the tool edge to rise and fall over the hard/soft parts. Once the tool has cut the indentations the bevel will follow the cut indentations causing the cutting edge to rise and fall extending them along in the direction of the rotation. It will continue to do so as the bevel runs in the cut part, a sort of closed loop feedback.
When it starts to get blunt, the amount of wood cut by the edge starts to vary a lot when the hardness of the wood starts to vary. So it will remove more of the softer wood than the harder wood. This will cause the tool edge to rise and fall over the hard/soft parts. Once the tool has cut the indentations the bevel will follow the cut indentations causing the cutting edge to rise and fall extending them along in the direction of the rotation. It will continue to do so as the bevel runs in the cut part, a sort of closed loop feedback.
