Old 09-28-2011, 06:15 AM
  #9  
Maia B
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Join Date: Nov 2010
Location: IL
Posts: 2,671
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The theory is that the horizontal bobbin orientation creates more drag, and another turn, that the bobbin thread must withstand. However, many domestic machines (Janome 6600 and Horizon 7700 come to mind) well-loved by serious, even professional quilters, have horizontal bobbins. I do perceive superior stitch quality with the vertical bobbin, so that's what I buy, but I know that others feel differently.
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