FAQs & Troubleshooting Popular CV3550 Not your product? 38 Results 31. How to attach and remove the presser foot 32. How to remove and install the needle 33. Stitches are not uniform 34. Stitches are skipped. 35. Threads break 36. Needles break 37. Preparation before threading 38. Adjusting the thread tension dials FAQs & Troubleshooting