Innov-is BP3500D FAQs & Troubleshooting Innov-is BP3500D Not your product? Sort by Updated Date Popularity 3 Results 1. 02/28/2017 How do I sew with the twin needle? 2. 07/26/2016 How do I adjust the sensitivity of the operation keys? 3. 11/12/2015 How do I select or display patterns according to the embroidery frame size? Operation FAQs & Troubleshooting