Scarfing machine

A scarfing machine for machining a scarf face at an edge of a wooden board material, the edge extending in a direction intersecting a fiber direction of the board material, the scarfing machine comprising:

• a holding unit configured to hold the board material with at least the edge of the board material protruding;
• a machining unit including a motor having a rotary shaft, and a disc cutter having a plurality of blades and connected to the rotary shaft, the machining unit positioned such that, on a virtual projection plane when viewed from one side of the extending direction of the edge of the board material, a projection of the edge of the board material intersects with a projection of the cutter;
• a supporting unit configured to support the machining unit in a state where the cutter is tilted at a first tilt angle relative to the board material so as to obtain the scarf face of a desired scarf ratio and also where the cutter is tilted at a second tilt angle relative to the board material so as to set the cutter to tilt downward in the direction of machining the scarf face;
• and
• a driving unit mechanically connected to the holding unit or the supporting unit and configured to move the holding unit relative to the supporting unit or move the supporting unit relative to the holding unit along the extending direction of the edge of the board material, wherein the second tilt angle has a value calculated based on the relative positional relationship between a rotation axis of the cutter and the scarf face, a camber of the scarf face having an arc concavity, the scarf ratio, a diameter of the cutter, and a thickness of the board material.