In manufacturing processes, shaping, planing, and slotting machines are reciprocating-motion machine tools that generate flat (and related bounded) surfaces through the combined action of a cutting motion (relative reciprocation between a single-point tool and the workpiece) and an intermittent feed motion perpendicular to it; the three machine types are kinematically and functionally analogous, differing chiefly in which element (tool or workpiece) reciprocates, the plane of motion, and machine scale/rigidity. Their kinematic systems—chains of mechanisms (belt-pulley, gear, rack-pinion, oscillating-lever, ratchet-pawl) transmitting motion from a power source to the tool and workpiece—also produce an inherent asymmetry between cutting and return strokes, known as the quick-return effect, characterized by a quick-return ratio.
In manufacturing processes, shaping, planing, and slotting machines are reciprocating-motion machine tools that generate flat (and related bounded) surfaces through the combined action of a cutting m…