CV3440 FAQs & Troubleshooting CV3440 Not your product? Sort by Updated Date Popularity 5 Results 1. 25/01/2018 Turning direction of handwheel 2. 09/08/2017 Adjusting the thread tension dials 3. 02/08/2017 How to adjust the stitch length 4. 01/08/2017 How to adjust the looper thread tension 5. 01/08/2017 Opening and closing the front cover Operation FAQs & Troubleshooting