Before using the engraving knife, ensure the tool is securely clamped and aligned with the center to prevent blade breakage or chipping. Maintain moderate rotation speed during engraving. Use high-speed, slow-feed for small letters and fine patterns, while appropriately reducing speed for large letters and deep carvings to avoid material smearing or tool skipping. Begin engraving from shallow depths and work layer by layer, avoiding deep cuts in a single pass. Keep the tool movement steady and uniform, avoiding forceful pushing or prying. Reduce cutting depth for hard materials. Keep the blade sharp—dull blades cause rough edges and vibration. Secure the material before processing to prevent displacement. Wear safety goggles during operation, keep hands away from the blade, and replace or clean the tool only after stopping. Wipe the tool clean promptly, apply anti-rust measures, handle with care to avoid chipping the edge, and extend tool lifespan.