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You can improve accuracy by recalibrating your machine frequently and ensuring the spindle and bed are perfectly level. When working on a CNC prototype, use high-quality, sharp cutting tools to minimize vibration and deflection. Choose stable materials like aluminum for testing before moving to harder metals. In your CAM software, enable adaptive toolpaths to reduce tool stress and improve precision. Keep your machine clean and regularly check for wear in bearings and guides. Also, maintain a consistent room temperature to prevent expansion or contraction of materials. These steps will greatly enhance overall precision and consistency.