Originally Posted by
raspberryparade09
My wish in a sewing machine is for the bobbin to be able to be an entire spool of thread! I just don't see why they can't make a machine to either hold a spool for the bobbin or have a way of threading an external thread held on a spindle!!
It's because of the way the sewing machine makes stitches. The top thread goes completely around the bobbin in order to make a lock stitch.
http://www.youtube.com/watch?v=HFo_FnozIM8
They have made machines with larger bobbins (size M), but the size is limited because the bigger the bobbin, the slower the machine has to sew. And after seeing that video, it's obvious that an external bobbin isn't possible.
Using a finer thread helps, you can load more thread on the bobbin.
My husband is the creative type and for fun, has been farting around in the garage with different quilting machine designs. He's Frankensteined several different sewing machines picked up from thrift stores. I told him if he could design a machine that had a huge bobbin and was in the $4000-$5000 range, we'd be millionaires.
