FS40s FAQs & Troubleshooting FS40s Not your product? Sort by Updated Date Popularity 3 Results 1. 15/07/2022 Winding and Installing the Bobbin [Video instructions] 2. 15/07/2022 Basic operations and sewing [Video instructions] 3. 08/10/2020 Upper threading [Video instructions] Instructional videos FAQs & Troubleshooting