Innov-is F400 FAQs & Troubleshooting Innov-is F400 Not your product? Sort by Updated Date Popularity 2 Results 1. 07/10/2016 How do I sew with the twin needle? 2. 07/10/2016 How do I adjust the sensitivity of the operation keys? More FAQs (English only) Operation FAQs & Troubleshooting