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Old 08-09-2014, 07:09 AM
  #4  
Tartan
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Join Date: Mar 2011
Location: Ontario, Canada
Posts: 41,476
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Could the yarn be thick enough that when it zigs over the yarn the thread doesn't go far enough under for the bobbin hook to catch it. Maybe loosen the top tension so the thread has a little more slack to get over the yarn?
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