Top Thread Not Picking Up Bobbin Thread?

Frugal Sunnie
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October 30, 20140 found this helpful

A thread nest like you're describing could be from incorrect upper tension (when was the last time you flossed the tension discs? Also, make sure you're using the correct upper tension for the fabric, thread, and needle you're using.),

or using the wrong needle for the fabric you're trying to sew (have you checked your manual or an online sewing site for correct needles for fabric types?),

or the feed-dogs being set wrong (have you checked your manual for the correct setting for the fabric you're sewing?),

or the stitch width, length, type isn't right (some machines have several settings for straight, zig-zag, or stretch, and all have to have all the settings adjusted per the manual instructions or thread nests and worse happen)

or the fabric you're using being so thin the machine pulls the fabric into the bobbin area just enough to cause the machine to spit a shedload of thread at it to get enough grip to move it under the needle and presser foot (try holding the thread tails at the back of the machine and gently pulling the thread tails taut as you start stitching).

Any of the above SHOULD solve your problem - if nothing works, it's time for a visit to the repair tech to have the bobbin gear replaced - usually the worst case scenario with thread nests.