EX-660 FAQs & Troubleshooting EX-660 Not your product? Sort by Updated Date Popularity 4 Results 1. 05/14/2015 How do I draw up the lower thread by hand? (For models equipped with the quick-set bobbin) 2. 05/14/2015 How do I wind the bobbin? (For models equipped with the fast bobbin winding system) 3. 05/07/2015 How do I wind the bobbin? 4. 04/07/2009 How do I correctly install a bobbin? Getting Ready FAQs & Troubleshooting