Innov-is BP3500D FAQs & Troubleshooting Innov-is BP3500D Not your product? Sort by Updated Date Popularity 3 Results 1. 04/26/2022 How to adjust the thread tension 2. 02/28/2017 How do I sew with the twin needle? 3. 02/28/2017 How do I thread the machine (Threading the upper thread)? Getting Ready FAQs & Troubleshooting