You should check and turn off the bobbin winder, as the noise may be caused by simultaneous bobbin winding in newer BERNINA models. ![]() Try rethreading the machine or cleaning the hook area before calling for service, as thread bunching and skipped stitches often stem from lint buildup over time. Having trouble with your Bernina sewing machine? From noisy operations to poor stitch quality, we have the solutions for your most common issues. Clear thick areas, rethread top and bobbin, check power source and cord connections. Machine stopping mid-sew may indicate hitting thick seam, thread jam, electrical issue.Rethread top and bobbin, adjust tensions, use better thread, check fabric positioning. Thread bunching can come from improper threading, tension problems, poor quality thread, hitting fabric edge during sewing.Change needle and thread per fabric type, adjust tensions, check winding and placement of bobbin, clean under plate. Look for reasons for poor stitch quality: wrong needle/thread, tension issues, bobbin wound wrong, build up under plate. ![]() Tighten loose parts, oil per manual instructions, remove lint and thread build up.
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