A keyseater machine is a type of machine tool used to cut keyways in a wide range of materials. The working logic of a keyseater machine is relatively simple and can be described as follows:

1. Fixturing: The material to be cut is clamped onto the bed of the keyseater machine using specialized fixtures to ensure it is held securely in place.
2. Setup: The keyseater machine is then set up to cut the desired keyway. This involves selecting the appropriate cutter and setting the depth, width, and length of the cut.
3. Cutting: The keyseater machine uses a reciprocating cutter, which moves up and down through the material, cutting away small amounts of material with each pass. The cutter is mounted on a horizontal ram that moves back and forth along the length of the material.
4. Finishing: After the keyway has been cut to the desired dimensions, the material is removed from the machine and the keyway is typically deburred and cleaned up to ensure a smooth surface finish.

Keyseater machines are used to cut keyways in a wide range of materials, including steel, aluminum, brass, and plastics. They are commonly used in the manufacturing of machine components, such as gears, pulleys, and shafts, as well as in the repair and maintenance of machinery. The working logic of a keyseater machine is straightforward, but the precision and accuracy of the cuts it produces are essential for ensuring the proper operation of the components it is used to produce or repair.