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Sailing Canoe Chapter 7: Sew a Skin over the Hull Skeleton and Seal it.

Step 8Bottom Thread Tension Adjustment on Touch&Sew Sewing Machines

Bottom Thread Tension Adjustment on Touch&Sew Sewing Machines
Here's the unlabeled screw that adjusts the bottom thread tension on these Singer model 600 and 646 Touch&Sew sewing machines. If you loosen it too much the little lever that holds the bobbin in place will no longer latch and the machine will choke on thread. If you loosen it even more parts will fall off.

Your unclean desire to loosen the bottom tension so much is due to your lack of top tension.
Make sure the machine is threaded properly.

If you don't know how to thread a machine, open all the doors and look at your machine from all angles. Usually there's a threading diagram hidden on the inside of some door.
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Author:TimAnderson
Tim Anderson is the author of the "Heirloom Technology" column in Make Magazine. He is co-founder of www.zcorp.com, manufacturers of "3D Printer" output devices. His detailed drawings of traditional ...
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