Innov-is 500D FAQs & Troubleshooting Innov-is 500D Not your product? Sort by Updated Date Popularity 2 Results 1. 02/04/2008 It is difficult to pass the thread through the needle bar thread guide(hook). 2. 11/05/2006 My automatic threader is not working. More FAQs (English only) Preparation FAQs & Troubleshooting