Using the Golz KS400E wire saw is quite easy. First, choose the appropriate diamond wire according to your cutting job. Connect the saw to a proper power source as it's an electric - driven tool. Place the saw on the area you want to cut and adjust it to the right position. For small and precise cuts, you can work either dry or wet as per your need. When you're done with the cutting, make sure to disconnect the power. As for maintenance, clean the saw regularly, especially after wet cutting to prevent rust. Check the wire and other parts for wear and tear frequently. If you notice any damage, replace the parts promptly. Also, keep the saw in a dry and safe place when not in use. Remember to follow all safety instructions provided with the saw to ensure your safety during operation.