There are various reasons for the noise made by your sewing machine: 1. Your machine might require cleaning and lubrication. Stop the operations and inspect the machine. 2. Your needle might need a replacement. 3. There could be an accumulation of lint under the needle plate and the bobbin area. Use a lint brush to clean the area gently. 4. Tread wrapped around the take-up level can also cause the machine to make noise. 5. Check out for any loose screws.